locomotive safety valve in stock

After a boiler has been engineered, built and tested for a given operating pressure there is only one reliable way to prevent operation of the boiler above this design pressure.  This is a safety valve.  The safety valve should be sized so that a single valve can handle the maximum steam production rate of the boiler and once open prevent boiler pressure to continue to rise.  Standard operating procedure for the last century has been to install two safety valves on the boiler, one set 3-5 lbs below the design pressure and one valve set at the design pressure.

The 1st valve listed below is a true adjustable differential pop valve.  The differential is adjured through the differential rings lock screw hole, from 3 PSI to whatever the operator desires.  The pressure of the valve can be adjusted from 40 to 200 PSI.

The other valves listed are adjustable for release pressure and have a "pop" action:  The pressure differential is not adjustable on these valves.  If the valves are operated above their nominal pressure, the set-reset differential increases.  If operated at lower pressure, the differential decreases to the point of disappearing about 10-15% below nominal pressure.

Kunkle Relief Valve OverviewWhen it comes to industrial and commercial safety and relief valve products, Kunkle’s valve’s catalog is second to none in steam, air, gas, and liquid applications.

Kunkle relief valves range in size from ¼” NPT to 6” flange and are suitable in cryogenic and high temperatures up to 800°F environments at vacuum to 7,500 psig pressure. Kunkle Valve’s code certifications meet several global and national board standards, including ASME Section I, Section IV, and Section VIII, PED, CRN, TU and Chinese, as well as non-code requirements.

Relief Valves for Steam ServiceSteam supplies heat for industrial and chemical processes and also is used to heat buildings, supply mechanical energy, and drive mechanical equipment. Steam moves from the boiler to the end point, then heats by direct heating or indirect heating through a heat exchanger. Kunkle steam relief valves are critical to protecting equipment such as boilers, steam lines, and pressure valves, from being over-pressurized.

Relief Valves for Air ServiceKunkle designs valves for air service, for example for air compressors in mechanical shops and small factories where either low-pressure or high-pressure air is required. NASVI stocks Kunkle relief valves for air service in iron, steel and bronze for a variety of uses.

Relief Valves for Liquid ServiceKunkle also makes valves for liquid service, which provide bypass relief in a variety of applications and liquid types.

More About KunkleKunkle Valve is a renowned pressure relief valve manufacturer. Erastus B. Kunkle invented the safety valve to prevent overpressure in locomotive engines. Kunkle patented it in 1875. Since that time, Kunkle has earned its reputation for high-quality valves, and other equipment manufacturers ship their products with Kunkle’s valves pre-installed.

NASVI has stocked Kunkle safety relief valves since we opened in 1975, so we are confident when we call ourselves Kunkle safety valve experts. Every day we fulfill orders for our customers looking for Kunkle relief valves for steam, air, gas, and liquid applications.

Modern “code” safety relief valves are not designed to operate continuously, as required in locomotive service. Locomotive style valves are designed for locomotive service. Our Consolidated type pressure relief valves are made to the original Consolidated design, and have the same reliability and durability as the originals. Consolidated did not recertify its locomotive style safety valves in the 1950s due to the lack of demand resulting from the demise of the steam locomotive. Though our pressure relief valves are identical to the original design, they are not National Board certified safety valves, as it is not economically feasible to have National Board recertify the design due to the small quantities required by steam locomotives today. If your jurisdiction requires a “code” safety valve, a practical solution is to install a “code” valve set at MAWP, as the “high pop,” and a Strasburg Rail Road pressure relief valve, set at 5 PSI below MAWP, as the “low pop.” This avoids lifting and wearing out the “code” safety valve.

One of the charms of steam locomotives is their individuality, but the downside of that lack of standardization is the tremendous number and variety of spare parts. The Strasburg Rail Road helps to solve that problem with our selection of flexible staybolt caps and sleeves. All are made of material certified to ASME specifications, and to the same dimensions as the old “standard” sizes. By consulting the thumbnail drawings below, it should be easy to match what we offer to your needs.

Boiler work on steam locomotives often means replacing staybolts. The Strasburg Rail Road stocks mill runs of certified, easy to drive SA-675 Grade 50 staybolt stock that we offer for sale as plain bar stock, or made to order in the form of rough or finished rigid, flexible or crown staybolts. We forge oversized heads on flexible and crown bolts, and our CNC lathes make getting your order ofcustom made bolts an easy and economical process. Thread, head and relief size and profile, bolt length and depth of telltale hole can all be customized to your specification.

RM2ABTFR2–gin 356 Coating Iron Pipes with Glass. New Nautical Instrument. New Tobacco Sifter. Life Boats. IMPROVED HARPOON. Duplex Safety Valve. Daguerreotype of a Star. A New Rotary Steam Engine. Hard Black-Lead Pencils for Artists. Imitation of Gold. Imitation of Platina. New Soft Metalic Packing for StuftIng Boxes. New Mode of Preserving Pork. New Reaping Machine. The Wheeling Bridge., scientific american, 1850-07-27

RM2AN28YJ–Knight"s American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . Lever-Presses, requires, or the weight is shifted in or out on thelever. See Safety-valve.Lev-i-gation. A j)rocess of rubbing a moist Fig. 2918.. Duplex Lever-Pttnch. material between two hard surfaces, as in grindingpigments and printers ink. LEWIS. 1299 LIEBERKUHN.

RM2AJF7TK–Cotton weaving: its development, principles, and practice . Fig. 191. 376 COTTON WEAVING. Another important safety provision is a combined high-steam and low-water safety valve, by the same inventor,and issuing from the same firm. It has been speciallydesigned to give prompt warning of the running short ofthe water supply, and to automatically reduce the pressurein the boiler, by allowing the steam to escape at tke same. time. It consists, as will be seen from the accompanyingillustration (fig. 192) of a duplex arrangement of levers,with a balance-weight suspended centrally above the float.The

RM2CH3G02–. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . LOCOMOTIVE MUFFLEDPOP SAFETY VALVE. DUPLEX AIRiBRAKE QAUQE. I STEAM HKAT^QAUQE.

RM2CPRK47–. Official proceedings . CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously.MAIN OFFICE AND WORKS. BOSTON, MASS.Stores : Boston, New York, Chicago and London, England. Send for Catalogue and Prices,

RM2CH1FA7–. Official proceedings . CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with Sargents Electrical Attacluiieiit for tak-ing? any number of diagrams simultaneously.MAIN OFFICE AND WORKS. BOSTON, MASS.Stores : Boston, New York, Chicago and London, England. Send for (.atalogiie and Prii;es,

RM2CH3WRT–. Official proceedings . CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Efjuiimieut. Crosby Locomotive Pop Safety Valves, Ilain or Muffled. Crosby Steam Pressure and Duplex Gages. Crosby Counter and Pressure Recorders. ORIGINAL Single Bell Chime Uhistles. Johnstone Blow-off Valves. CROSBY SIEAM ENGINE INDICATOR, with SarKeiits Electrical Attachment for tak-iiiK any iiunilier of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTO.N, MASS.Stores : Boston, New York, Chicago and London, Enf^land. Senil for Catalogue ami Irices,

RM2CRJM8N–. Official proceedings . HOMESTEAD,^^., OFF A catalog or call by Representativefor the asking. & 0 0 » 0 Homesteaft Valve Mf|. Co., Works: Homestead, Pltt$birgli, Pt.. CROSBY STEAM GAGE & VALVE CO. Standard Locomolive Specialties Make a Perfect Eauipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Ctosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whjslles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTO>J

RM2CRGXWK–. Official proceedings . A catalog or call by Representativefor the asking. & * & & * Homestead Valve Hit Co., Works: Homestead, Pittsburgh. Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves.CROSBY S1EAM ENGINE INDICATOR, with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously.MAIN OFFICE AND WORKS. BOSTON, MASS.Stores : Boston, New

RM2CH3AY6–. Official proceedings . A catalog or call by Representativefor the asking. ^ m e 0 9 Smaesleai YalTe Mt Co., Works: Homestead, Pittsburgli, Pa,. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, riaiii or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. with Sargents Electrical Attacliinent for tak-iiif^ any iiuiiilier of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS. Stores :

RM2CPW4DC–. Official proceedings . A catalog or call by Representativefor the asking. # # * * # Homestead Valve M|. Co., Works: Homestead, Pittsburgh. Pi.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with Sargents Electrical Attachment for tak-ing any Dumber of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS.Stores : Boston, Ne

RM2CH19T5–. Official proceedings . A catalog or call by Representativ*for the asking. £10 0 0 0 Hoiiiesteai Valve Ml. Co., Works; Homestead, Pittsliurgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipuieiit.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whisllcs.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously.MAIN OFFICE AND WORKS. BOSTON, MASS.Stores : Boston

RM2CH2861–. Official proceedings . A catalog or call by Representativ*for the asking. 0 if & £> m Hoaesteal ValYC Mi Co., Works: Homestead, Pittsburgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment. Crosby Locomotive Pop Safety Valves, Plain or Mufifled. Crosby Steam Pressure and Duplex Gages. Crosby Counter and Pressure Recorders. ORIGINAL Single Bell Chime Whistles. Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. witli Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously-MAIN OFFICE AND WORKS. BOSTON, MASS. Stores :

RM2CH0RKH–. Official proceedings . A catalog or call by Representativefor the asking. & H & & 0 Hofflesteai Valve . Co., Works: Homestead, Pittsburgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Eriuipment. Crosby Locomotive Pop Safety Valves, Plain or Munied. Crosby Steam Pressure and Duplex Gages. Crosby Counter and Pressure Recorders. ORIGINAL Single Bel! Chime Whistles. Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with Sartteiits ]<^lectrical Attaehnteiit for taiv-iiit^ any nuinlier of diatcranis .simultaneously. MAIN OFFICE AND WORKS. BOSTON,

RM2CRJ9C4–. Official proceedings . A catalog or call by Representativefor the asking. i» 0 £1 £> 0 HoBiesteal Valve fflf|. Co., Works: Homestead, Plltsbrreii. Pi.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS. Stores

RM2CH2KMB–. Railway mechanical engineer . Details of Rigby Liquid Fuel Regulating Valve provides a guarantee against waste of fuel. The installationof the valve from a safety point of view is highly important,as explosions due to leakage are almost an impossibility. Itis stated that savings of five to 15 per cent are possible byusing the Rigby regulating valve. The valve is manufacturedin sizes suitable for various conditions, with two standardsizes; namely: type A with 1-in. valve travel; and tvpeB with y2-in. travel. March, 1921 RAILWAY MKCHANICAL ENG1NKKK 195 Duplex Mono Flue Gas Analyzer ANEW type o

RM2CRJ5P3–. Official proceedings . A catalog or call by Representativefor the asking, e » & » tt Hiiiiesteafl Valfe % Co., Works: Homestead, Pittsburgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Eauipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. with Sarsetits Electrical Attachment for tak-iiiK any number of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS. Stores : ; Bo

RM2CRN0PR–. Official proceedings . A catalog or call by Representativefor the asking. 0 & & & 8P Homestead Valve M|. Co., Works: Homestead, Pittsburgh. Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS. Stores : Boston,

RM2CH2F7J–. Official proceedings . A catalog or call by Representativefor the asking. 0 ft 0 0 m mM. Valve Mf|. Co., Works: Homestead, Pittsburtli, P«.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment. Crosby Locomotive Pop Safety Valves, Plain or Muffled. Crosby Steam Pressure and Duplex Gages. Ciosby Counter and Pressure Recorders. ORIGINAL Single Bell Chime VVhislles. Johnstone Blow-off Valves. CROSBY S1EAM ENGINE INDICATOR, with SaiKents Elpctrical Attaelinieiit for tak-iii}^ any number <jf diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS.store

RM2CH14R4–. Official proceedings . A catalog or call by Representativefor the eisklng. 0 0 & £i 0 HoiaestEafl Talfe Mi Co., Works: Homestead, Pittsburgh, Pa.. CROSBY STEAM GAGE & VALVE CO Standard Locomotive Specialties Make a Perfect Equii)meDt.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. witli Sart^eiits Ekctrieal Attaeiiiiient for tak-iiJK any number of tliagrains simultaneously.MAIN OFFICE AND WORKS. BOSTON, MASS.Stores :

RM2CH20NN–. Official proceedings . Hofflesteaa Yalie Mfj. Co., Works; Homestead, Pittsburgh, Pa,. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equiinnent.Crosby Locomotive Pop Safety Valves, riain or Muffle-l.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with Sargents Elcctiieal Attaclinient Icir tak-ing any mini tier iit iliatiranis simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS. Stores: !Boston, New York, Ctiicago and London, England. Send

RM2CH0M7J–. Official proceedings . A catalog or call hj Representathr*for the asking. 0 » m m 0 HoDesteai Yalre Mfn. Co., Works: Homeslead, PItlsbuigk, Pi.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties M;ike a Perfect Efjuipment.Crosby Locomotive Pop Safety Valves, Pliiiii or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves.CROSBY STEAM ENGINE INDICATOR. with Sartjents Eit-etrieal Attachiiieiit for tak-iiiK any nunilier of cliaKraiiis siiiiultaiieously.MAIN OFFICE AND WORKS. BOSTON, MASS.St

RM2CR8BF9–. Official proceedings . A catalog or call by Representativefor the asking. & & & & & Homestead Valve M|. Co., Works: Homestead, Pittsairgb. ft.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment. Crosby Locomotive Pop Safety Valves, Plain or Muffled. Crosby Steam Pressure and Duplex Gages. Crosby Counter and Pressure Recorders. ORIGINAL Single Bell Chime Whistles. Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS. Stores : Bost

RM2CR6DKW–. Official proceedings . HOMESTEAD , 0,FF A catalog or call by Representativ*for the asking. ^ 0 ^ J9 0 ImM Valve Wi Co., Works: Homestead, Pittsburgh, P«.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves.CROSBY STEAM ENGINE INDICATOR, with Sargents Electrieal Attachment for tak-ing any number of diagrams simultaneously.MAIN OFFICE AND WORKS. BOSTON, MASS.Stores : B

RM2CR2E5P–. Official proceedings . A catalog or call by Representativefor the asking. 0 0 0 0 0 Homestead Valve Mfj. Co., Works: Homestead, Pittsburgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Hake a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves.CROSBY STEAM ENGINE INDICATOR. with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously.MAIN OFFICE AND WORKS. BOSTON, MASS.Stores : Boston, New

RM2CR7FTY–. Official proceedings . HOMESTEAD Off A catalog or call by Representativefor the asking. 0 t> 0 £i 0 ImM. ValTe Mfi Co., Works: Homestead, Pittsburgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment. Crosby Locomotive Pop Safety Valves, Plain or Muffled. Crosby Steam Pressure and Duplex Gages. Crosby Counter and Pressure Recorders. ORIGINAL Single Bell Chime Whistles. Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. witli Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS

RM2CR77E9–. Official proceedings . A catalog or call by Representativefor the zisking. 0 t» ^ & m miiii Valie MfE. Co., Works: Homesteail, Pittsburgh, Pa.. r CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS. Stores : Bosto

RM2CH1TBJ–. Official proceedings . io:mesteap fj., A catalo|[ or call by Representativefor the askini;. & 0 & 0 0 Eomesteafl Valve Mfj. Co., Works: Homesteid, Pittsburgh, Pi.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a PerfeL-t Equipnuiit. Crosby Locomotive Pop Safety Valves, riain Ml- MutTlr Crosby Steam Pressure and Duplex Gages. Crosby Counter and Pressure Recorders. ORIGINAL Single Bell Chime Whistles. Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. with Sargtiifs Elot-trieal Attaehnieiit U>v taiiitr any iminlier of diagrams siimiitancously MAIN OPFICE-AND WORK

RM2CH23MY–. Official proceedings . A catalog or call by Representativefor the asking. ^ j& j& j& Sf MiM YalTB 1%. Co., Works: Homestead, Pittsiurgb, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect EciuipiiitMit. Crosby Locomotive Pop Safety Valves, Plain .ir Muffled. Crosby Steam Pressure and Duplex Gages. Crosby Counter and Pressure Recorders. ORIUINAL Singe Bell Chime Whittles. Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. witli Sargents Electrical Attachiiieiit for tak-intc any niunber ui diagrams siauiltaneously. MAIN OFFICE AND WORKS. BOSTON, MASS-iStor

RM2CR2J21–. Official proceedings . A catalog or call by Representativefor the asking. 0 0 0 0 0 Homestead Valve Mi Co., Works: Homestead, Pittsburgh, P».. rr CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS. Stores : Boston,

RM2CR6KMP–. Official proceedings . A catalog or call by Representativefor the asking. & 0 & & 0 Koiaesteaft Valie . Co., Works: Hoinestead, Pittsburgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment. Crosby Locomotive Pop Safety Valves, Plain or MufHed. Crosby Steam Pressure and Duplex Gages. Crosby Counter and Pressure Recorders. ORIGINAL Single Bell Chime Whistles. Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, witli Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS.Stores : Bo

RM2CH4CR1–. Official proceedings . A catalog or call by Representativefor the eiskine. iS 0 & & ST Hdiaesteaft Valie Ifj. Co., Works: Homestead, Pittsburgh, Pa.. r CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, witli SarKents Electrical Attaclmieiit for tak-iiif^ any number of diagrams Himultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS. Store

RM2CPHNJ3–. Official proceedings . 0 ty J ::StEAp & & * Meal Valve M|. Co., Works: Homestead, Pittsburgh, P».. /? CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves.CROSBY STEAM ENGINE INDICATOR, with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously.MAIN OFFICE AND WORKS. BOSTON, MASS.Stores : Boston, New York, Chicago and London, England.Send for

RM2CH3FAW–. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . LOCOMOTIVE MUFFLEDPOP SAFETY VALVE. DUPLEX AIRiBRAKE QAUQE. I STEAM HKAT^QAUQE.. AMERICAN STEAM GAUGE COMPANY General Offices and Works: JAMAICA plain: BOSTON MASS. N. V. Branch : 35 Dcy Street, New York. City Salefi Office ; 18S Franklin Street, Boston, Mass. Western ISranch ; 16 North Canal Street, Chicago. A Practical Journal of Railway Motive Power and {polling Stock Vol. XIV The Vanderbilt Boiler. At the invitation of the Junior Club ofthe American Society of Mechanical En-gineers Mr. Co

RM2CH0AF5–. Official proceedings . A catalog or call by Representativefor the asking. 0 0 0 0 0 HoEsteal Valve Mfj. Co., Works: Homestead, Pitlsburgli, P«.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, IMaiii or MufQed.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. with Sargents Electrical Attacluiient for tak-ing any iiuiiilier i>f diagrams simultaneously.MAIN OFFICE AND WORKS. BOSTON, MASS.Stores :

RM2CPNPD5–. Official proceedings . LOCOMOTIVE BLOW-OFF DO.ES SATISFACTORY WORKON MANY ROADS. Can be worked from cab orfoot board while running. A catalog or call by Representativefor the asking. & M & & 0 Homestead Valve Mi Co., Works: Homestead, Pittsburgh, P*.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves.CROSBY S1EAM ENGINE INDICATOR, with Sargents Electrical Attachment

RM2CH2DX9–. Official proceedings . A catalog or call by Representative for the asking. ^ JH /& /& if Hofflesteail TalTe Mfj. Co, Works; Homestead, Pitt^liursh. Pi.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Eiiuipiiient. Crosby Locomotive Pop Safety Valves, Ilaiii or Mum.Mt. Crosby Steam Pressure and Duplex Gages. Crosby Counter and Pressure Recorders. ORIGINAL Single Bell Chime Whistles. Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. with SarKfiit.s Electrical Atlacliment Uiv tak-ing any nunit)er of iliasranis siimiltaiieously. MAIN OFFICE AND WORKS. BOSTON

RM2CPY930–. Official proceedings . A catalog or call by Representativefor the asking. 0 0 0 0 0 Homestead Valve lit Co., Works: Homestead, Pittsburgh, P*.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS.Stores : Boston, Ne

RM2CH1K4C–. Official proceedings . A catalog or call by Representativefor the asking. 0 tt & & 0 OMESTE- ValTfi Mi Co., Works: Homestead, Pittsburgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equiimient.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. with Sargents Electrical Attachment for tak-ing any number of diagrams siiiniltaneou.sly. MAIN OFFICE AND WORKS. BOSTON, MASS. I Stores : Bost

RM2CRHH82–. Official proceedings . A catalog or call by Representativefor the asking. 0 0 0 » 0 mM. Valve Mi Co., Works: Homestead, Pittsburgh, Pa.. rr CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with SarKeiits Electrical Attachment for tak-ing any number of liiagranis .sinuiltaneously. MAIN OFFICE AND WORKS. BOSTON, MASS. Stores : l Bosto

RM2CR0WFK–. Official proceedings . A catalog or call by Representativefor the asking. 0 0 0 0 0 Homestead Valve It Co., Works: Homestead, Pittsburgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves.CROSBY STEAM ENGINE INDICATOR, with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously.MAIN OFFICE AND WORKS. BOSTON, MASS.Stores : Boston, New Y

RM2CRJRBJ–. Official proceedings . HOMESTEAD■OFF A catalog or call by Representativefor the asking, e m & 0 if Homesteaft Valve Mi Co., Works: Homestead, PitUbrreli. Pl. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with Sargents Electrical Attachment for tak-ing? any number uf diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS. Sto

RM2CR73B7–. Official proceedings . A catalog or call by Representativ*for the asking. & & & & 0 Ksmesteai Valie Mf|. Co., Works: Homestead, Pittsburgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment. Crosby Locomotive Pop Safety Valves, Plain or Muffled. Crosby Steam Pressure and Duplex Gages. Crosby Counter and Pressure Recorders. ORIGINAL Single Bell Chime Whistles. Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS.Stores : Bost

RM2CH0XF1–. Official proceedings . HOMESTEAD A catalog or call by Representativefor the asking. ^ 0 ^ ^ gf HomesteaS YalYC Mft Co., Works: Homestead, Pittsburgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment. Crosby Locomotive Pop Safety Valves, . Plain or Muffled. Crosby Steam Pressure and Duplex Gages. Crosby Counter and Pressure Recorders. ORIGINAL Single Bell Chime Whistles. Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. witii Sargents Klei-trieal Attaehnient for tak-iiitr any numt.ier i >f diatcranis siniiiltaneou-ily. MAIN OFFICE AND WORK

RM2CH0BD5–. Official proceedings . A catalog or call by Representativefor the zisking. ^ 0 i^ & 0 Boiaesteal Yalie fflf|. Co., Works: Homestead, Pittsburgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties JIake a Ierfect Efiuiriment.Crosby Locomotive Pop Safety Valves, riaiii or MufQed.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, witli SarKiiits Electrical AttacliiiuMit for tak-ing any iiumlier > if dia!:fraiiis si in ultaneously. MAIN OFFICE AND WORKS. BOST

RM2CH30YB–. Official proceedings . A catalog or call by Representativefor the asking. & 0 £t a m HoEifistead Valie Mfi Co., Works: Homestead, Pittsburgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment. Crosby Locomotive Pop Safety Valves, riain or Muffled. Crosby Steam Pressure and Duplex Gages. Crosby Counter and Pressure Recorders. ORIGINAL Single Bell Chime Whistles. Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with Sargents Electrical Attachment for tak-ing any nuinher of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS, stores Bo

RM2CR6246–. Official proceedings . A catalog or call by Representativefor the asking. 0 tl & & » Hsmesteafl Valie % Co., Works; Homestead, Pittsburgh, Pit,. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously.MAIN OFFICE AND WORKS. BOSTON, MASS.Stores : Boston, N

RM2CH1P78–. Official proceedings . A catalog or call by Representativefor the asking. iS 0 iS & 0 mM. Yalve Mf|. Co., Works: Homestead, Pittsburg;li, Pa. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment. Crosby Locomotive Pop Safety Valves, Plain or Muffled. Crosby Steam Pressure and Duplex Gages. Crosby Counter and Pressure Recorders. ORIGINAL Single Bell Chime Whistles. Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. with Sargents Electrical Attachment for tak-ing ;iny number of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS.Stores : l Bo

RM2CR9MFX–. Official proceedings . A catalog or call by Representativefor the asking. 0 0 0 0 0 Homestead Valve Mf|. Co., Works: Homestead. Pimbirgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS. Stores : Boston, Ne

RM2CRJ09E–. Official proceedings . :<TMAYi6l6-- A catalog or call by Repreientativ*for the asking. 0 m 0 0 m Houesleal Valve Mi Co., Works: Homestead, Pittsburgli, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Eciuipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS. S

RM2CRJNH0–. Official proceedings . A catalog or call by Representativefor the asking. & G & & 0 Homestead Valve M|. Co., Works: Homestead. Pittsburgh. Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment. Crosby Locomotive Pop Safety Valves, Plain or Muffled. Crosby Steam Pressure and Duplex Gages. Crosby Counter and Pressure Recorders. ORIGINAL Single Bell Chime Whistles. Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. with Sargents Electrical Attachment for tak-ing any nnmber i >f diagrams simultanet msly. MAIN OFFICE AND WORKS. BOSTON. MASS. Stores

RM2CH366C–. Official proceedings . A catalog; or call by Representative for the asking. 0 0 0 0 0 Rameslead Valie Mf|. Co., Works: Homestead, Pittsburgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. witii Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS. Stores : Bosto

RM2CRHRN3–. Official proceedings . A cat&lo^ or cftll by Representativ*for the asking. 0 0 0 0 0 HoEsteail Valve Mfj. Co., Works: Homestead, Pittsburgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves.CROSBY STEAM ENGINE INDICATOR. with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously.MAIN OFFICE AND WORKS. BOSTON, MASS.Stores : , Boston,

RM2CH2R4A–. Official proceedings . A catalog or call by Representativefor the asking. 0 0 0 0 0 miiii ValTe MfE. Co., Works: Homesteail, Pittsliurgb, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment. Crosby Locomotive Pop Safety Valves, Plain or Muffled. Crosby Steam Pressure and Duplex Gages. Crosby Counter and Pressure Recorders. ORIGINAL Single Bell Chime Whistles. Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. with Sargents Electrical Attachment for tak-ing any numl.ier of diagrams simultaneously. MAIN OPPICE AND WORKS. BOSTON, MASS.Stores : Bo

RM2CR67DK–. Official proceedings . LOCOMOTIVE BLOW-OFF DOES SATISFACTORY WORKON MANY ROADS. Can be worked from cab orfoot board while running. A catalog or call by Representativ*for the asking. 0 0 0 0 0 miit Valie Mfi Co., Works: Homestead, Pittsburgli, H.. rr CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make -a Perfect Eriuipment.Crosby Locomotive Pop Safety Valves, Plain or MuflQed.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves.CROSBY STEAM ENGINE INDICATOR, with Sargents Electrical Attachme

RM2CRJHP6–. Official proceedings . A catalog or call by Representativefor the asking. 0 0 £l H 0 Honiesteaft Valve Mf|. Co., Works: HonKstead, Plttsbrrgh. Pi.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, witli Sargents Electrical Attacliment for tak-ing any number of diagrams simultaneously.MAIN OFFICE AND WORKS. BOSTON, MASS.Stores : Bosto

RM2CRE0G0–. Official proceedings . A catalog or call by Representativefor the asking. & & & & & Homesteal Valve Ml. Co., Works: Homestead. Pittsburgh. Pa.. CROSBY STEAM GAGE & VALVE CO Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime thistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. with Sargents Electrical Attachment for tak-ing any Dumber of diagrams simultaneously.MAIN OFFICE AND WORKS. BOSTOv, MASS.Stores : Boston, New

RM2CH49J1–. Official proceedings . A catalog or call by Representativefor the asking. & 0 & £> 0 mM. Valie Mf|. Co., Works: Homestead, Pittsburgh, Pa,. /? r CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, riain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. with Sargents Electrical Attachment for tak-ing any number of iliagranis simultaneously.MAIN OFFICE AND WORKS. BOSTON, MASS.stores : Bost

RM2CRD1EM–. Official proceedings . A catalog or call by Representativefor the asking. & & & & ST Homestead Valve It Co, Works: Homestead, Pittsburgh. Pa.. CROSBY SI LAM GACjE & VALVE CO. Standard Locomotive Specialties Hake a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves.CROSBY S1EAM ENGINE INDICATOR. with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously.MAIN OFFICE AND WORKS. BOSTOv, MASS.Stores : Boston, New

RM2CR5P2F–. Official proceedings . A catalog or call by Representativ*for the asking. S 0 & & 0 mM. TalTe Mfj. Co., Works: Homestead, Pittsburgh, P>.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Muke a Perfect Eauipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, witli Sargents Eleetrieal Attaclimetit for tak-ing any nuinlier of diaKranis simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS. stores : Bost

RM2CH02JP–. Official proceedings . A catalog or call by Representativefor the asking. £10^00 HoBiesteal Valve Mf|. Co., Works: Homestead, Pittsburgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Efiuipment.Crosby Locomotive Pop Safety Valves, Plain or Muffled. Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves.CROSBY STEAM ENGINE INDICATOR, witii Sargents Eleetrieal Attachment for tak-ing auv number of diagrams simultaneously-MAIN OFFICE AND WORKS. BOSTON, MASS.Stores : Boston, Ne

RM2CRHY4M–. Official proceedings . A catalog or call by Representativefor the asking. & & & & 0 Homestead Valve Mi|. Co., Works: Homestead, Pittsburgh. Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain r Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with Sargents Electrical Attachment for tak-ing any number of diagrams simultaneously. MAIN OFFICE AND WORKS. BOSTON, MASS. Stores : Boston, N

RM2CH2B25–. Official proceedings . LOCOMOTIVE BLOW-OFF DOES SATISFACTORY WORKON MANY ROADS. Can be worked from cab orfoot board while running. A catalog or call by Representativefor the asking. j& JH j& ^ S^ iMESTEAP Homesteai Uu Mfi Co., Works: Homestead, Pittsburgh. Pi,. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make a Perfei-t Eiiii|imeiit.Crosby Locomotive Pop Safety Valves, Ilain or Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Whistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR, with Sar^fiifs Elec

RM2CH07AP–. Official proceedings . A catalog or call by Representativefor the asking. & 0 & iS 0 KdBiesteail Yalfe Mi Co., Works: Homestead, Pittsburgh, Pa.. CROSBY STEAM GAGE & VALVE CO. Standard Locomotive Specialties Make ;i Jcrfect E<iiipinent. Crosby Locomotive Pop Safety Valves, Ilain or BIufQed. Crosby Steam Pressure and Duplex Gages. Crosby Counter and Pressure Recorders. ORIGINAL Single Bell Chime Whistles. Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. with S,-n-K<Mif s Isleetrieal Attaclmieiit fr)r tak-iiitr any minilit^c 111 iliaKraiiis siinultaiHiiusiy. MAIN OFFICE AND WOR

RM2CRAYJG–. Official proceedings . A catalog or call by Representativefor the asking. & *» & & 0 Homestead Valve Mi Co., Works: Homestead, Pittsbirgh. Pa.. CROSBY STEAM GAGE & VALVE CO Standard Locomotive Specialties Make a Perfect Equipment.Crosby Locomotive Pop Safety Valves, Plain <:t Muffled.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Bell Chime Uhistles.Johnstone Blow-off Valves. CROSBY STEAM ENGINE INDICATOR. withSarge - ieal Attachment for tak- ing any Dumber of diagrams simaltaj .MAIN OFFICE AND WORKS. BOSTON. MASS. Stores : Boston, New York, C

RM2CH11X9–. Official proceedings . A catalog or call by Representativefor the asking. 0 0 & & 0 HcDiesteafl Valve M| Co., Works: Homesteid, PitUiurgli. Pi.. CKOSBY SItAM GACjt & VALVE CO. Sandard Locomotive .Specialties M.ike a Ierfei-t l-Jiiiipiiifn t.Crosby Locomotive Pop Safety Valves, Ilain ..!• MiifllCrosby Steam Pressu e and Duplex Gages.Cosby Counter and Pressure Recorders.ORIGINAL Single Be!! Chime Uhisiles.Johnstone Blow-off Valves.CROSBY SIEAM ENGIE INDICATOR. with SarKfiifs Eifi-trieal Arrarliiiuiit fort; iiiK any n uinlier If iliatciaiiis .--iiii ultaln.nu>l MAIN Ot-FILE AND UOkKS. BOST

RM2CH1EBY–. Official proceedings . A catalog or call by Representativefor the asking. & 0 & & Sf Homestead Valie ti. Co., Works; Homestead, Pittsburgh. Pa.. CK0M5Y ^ItAM GA(jt & VALVE CO. Standard Locdtnotive Specialties ][al<i- u rcffect IviuipnuMit.Crosby Locomotive Pop Safety Valves, ]laiii (11- Miinhil.Crosby Steam Pressure and Duplex Gages.Crosby Counter and Pressure Recorders.ORIGINAL Single Hell Chime Uhisk-s.Johnstone Blow-off Valves. CROSRY SIEAIM fNGI^E INDICATOR. witli Siirseiit.s ]^lfctrlc!il .•^triH/liiiiciit Icir ta iIhh: any number nf diatri-ain.s siin ultancou.sly MAIN OFFICE AND WO

RMRHTMTJ–. Better fruit. Fruit-culture. Page 10 BETTER FRUIT Febniarv T Drive the Solution into the Trees Under a Uniform Heavy Pressure The satisfactory results obtained with either the Alpha Triplex or Alpha Duplex outfits are due primarily to the fol- lowing unquestionable superior features of Alpha Sprayers: The Automatic Pressure Governor which insures safety, secures uniform pressure and elimi- nates unnecessary wear and strain on both pump and engine. No troublesome relief valve or diaphragm pres- sure regulators are required on Alpha Sprayers. No liquid is pumped except through the nozzles. The

RMRHTJM0–. Better fruit. Fruit-culture. igi6 BETTER FRUIT Page 2j The Alpha Automatic Power Spray Outfit (PATENTED) Fitted with 2-inch or 2"2-"nch Automatic Duplex or Triplex Pump.—Equipped with the New Mechanical Automatic Pressure Governor Which Insures Safety. Secures Uniform Pressure and Elimi- nates Unnecessary Wear.—No Relief or Diaphragm Valve Required.—Top Guard Rails Fold Up or Can Be Quickly Removed.—Gear or Beit Driven.— Brass Fitted Throughout. THE TWO ESSENTIALS in a power sprayer are a thoroughly dependable engine of ample horsepower and a positive and reliable pressure reg-ulator that wi

RMRHTKNM–. Better fruit. Fruit-culture. Page j( BETTER FRUIT Jaitiiarv The Alpha Automatic Power Spray Outfit (PATENTED) Fitted with 2-inch or 2i""2-inch Automatic Duplex or Triplex Pump.âEquipped with the New Mechanical Automatic Pressure Governor Which Insures Safety, Secures Uniform Pressure and Elimi- nates Unnecessary Wear.âNo Relief or Diaphragm Valve Required.âTop Guard Rails Fold Up or Can Bs Quickly Removed.âGear or Belt Driven.âBrass Fitted Throughout. THE TWO ESSENTIALS in a iniwer spraypr are a thoroughly dependable eiiyiiie ui aniijle horsepower and a positive and reliable pressure iemulat

RMRHTNHD–. Better fruit. Fruit-culture. Bean Power Sprayers Bean Little Giant Duplex Capacity 5 gallons per minute, 200 lbs. pressure. $upplies 2 lines of hose. • Bean Pony Duplex Capacity 5 gallons per minute, 200 lbs. pressure. Supplies 2 lines of hose. (Overhead suction.) Bean Eureka Sprayer Capacity 2V2 gallons per minute, 200 lbs. pressure. Supplies 1 line of hose. A one-man, one-horse outlit. Bean Midget Sprayer Mounted on skids. Capacity 2V2 gallons per minute, 200 lbs pressure. Supplies 1 line of hose. Bean Ball Safety Valve. For All Makes of Sprayers A new safely "al"e embodying part of the

RMRHTPA0–. Better fruit. Fruit-culture. Bean Power Sprayers Bean Little Giant Duplex Capacity 5 gallons per minute, 200 lbs. pressure. Supplies 2 lines of hose. Bean Pony Duplex Capacity 5 gallons per minute, 200 lbs. pressure. Supplies 2 lines of hose. (Overhead suction.) Bean Eureka Sprayer Capacity 2% gallons per minute, 200 lbs. pressure. Supplies 1 line of hose. A one-man, one-horse outfit. Bean Midget Sprayer Mounted on skids. Capacity 2Vj gallons per minute, 200 lbs pressure. Supplies 1 line of hose. Bean Ball Safety Valve. For All Makes of Sprayers A new safety valve embodying" part of the

RMTWH30F–Relief and safety valve of turbine unit no. 1, located in the subway below the Generator Room; looking south. The safety valve was manufactured by the Chapman Valve Company of Springfield, Massachusetts. It is identical to the adjacent safety valve for turbine unit no. 2. Photo by Jet Lowe, HAER, 1989. - Puget Sound Power and Light Company, White River Hydroelectric Project, 600 North River Avenue, Dieringer, Pierce County, WA; Shuffletin, Samuel L; Stine, Charles; Webster, Edwin; Baker, Charles H

RF2C9C8DA–A pop valve or relief valve, is a type of safety valve used to control or limit the pressure in a system or relief pressure, vintage line drawing or e

RF2E2R849–Relief valve outline vector icon. Thin line black relief valve icon, flat vector simple element illustration from editable construction and tools conc

RFT8CP8C–Landschaftspark Duisburg, Germany: Close up of isolated red rusty relief control valve with flakes of peeled off paint against a white metal wall

RMP3PX80–Senior Airman Seth Bayles, a 386th Expeditionary Aircraft Maintenance Squadron aerospace ground equipment journeyman, sprays a dry lubricant on a jack tester at an undisclosed location in Southwest Asia, May 7, 2017. AGE members use the jack tester to test the relief valve on a 30-ton aircraft jack, ensuring its operational capability to reduce safety hazards to aircraft and personnel.

RF2AEP07A–Manual operated handle ball valve with focus on stem and nut of the hand wheel in mechanical workshop, at industrial plant or factory. Equipment, cabl

RMPFY0H9–. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. Fig. 3. Hardie Escape Valve Showing Com- pressor, Spring, Ball, and Seat. A neat, re- liable and durable type of safety relief valve. Longer rods are not often needed, and are cumbersome and hard to handle on ac- count of their length. Power Outfits Power outfits should be chosen accord- ing to capacity and simplicity. Weight is a factor to be de

RMRD7R7K–. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. Fig. 3. Hardie Escape Valve Showing Com- pressor, Spring, Ball, and Seat. A neat, re- liable and durable type of safety relief valve. Longer rods are not often needed, and are cumbersome and hard to handle on ac- count of their length. Power Outfits Power outfits should be chosen accord- ing to capacity and simplicity. Weight is a factor to be de

RMMRA92F–Senior Airman Seth Bayles, a 386th Expeditionary Aircraft Maintenance Squadron aerospace ground equipment journeyman, sprays a dry lubricant on a jack tester at an undisclosed location in Southwest Asia, May 7, 2017. AGE members use the jack tester to test the relief valve on a 30-ton aircraft jack, ensuring its operational capability to reduce safety hazards to aircraft and personnel.(U.S. Air Force photo/TSgt Jonathan Hehnly)

RM2AJH5K7–Steam boiler explosions, in theory and in pactice; . evealed the fact that the boiler was not properlysupplied with water. A portion of the crown sheetwhich we examined showed conclusively that near theflues it was red-hot. We also examined the safety-valve,which was of the wing pattern, having a lever and weight.This valve was so firmly corroded to its seat that it couldnot be removed, and the stem was also corroded fast.The whole secret of this explosion is that the boiler wasshort of water and an excessively high pressure of steamwas raised to an unknown point; which, without relief,acquiri

RM2ABX6HA–Barnes" Foot-Power Machinery et NEW VICTOR ARTESIAN TO BUSINESS MEN Presses Corn Shelters Pile Drivers Well Diggers Stc. CINCINNATI. OHIO. POP SAFETY VALVE WATER RELIEF VALVE IMPROVED STEAM GAGE STEAM ENGINE INDIOATOR used In connection with Steam Air and Water. CHALMERS SPENCE CO. DE, scientific american, 1890-10-18

RMR6N138–Senior Airman Seth Bayles, a 386th Expeditionary Aircraft Maintenance Squadron aerospace ground equipment journeyman, sprays a dry lubricant on a jack tester at an undisclosed location in Southwest Asia, May 7, 2017. AGE members use the jack tester to test the relief valve on a 30-ton aircraft jack, ensuring its operational capability to reduce safety hazards to aircraft and personnel.

RM2AM3J7B–The Locomotive . the safety valves soon began to blow. Thesevalves were said to have been set to relieve the pressure at no lbs.In spite of the relief afiforded by the safety valves, the pressure on theboilers continued to rise, 140 lbs. having been noted shortly beforethe explosion by one of the survivors. A few moments after thisobservation both boilers exploded. The foregoing evidence, togetherwith the violence of the explosion, would seem to indicate over-pressure,resulting from insufficient safety valve capacity, as the cause of theaccident. As all of the mill employees were at work at th

RM2ABX660–USE ADAMANT WALL PLASTER 4ealers. SEBASTIAN MAY8b CO"S 165 W. 2d St. Cincinnati O. EDISON LAMPS We will send free Catalogue E How to Make a Cheap Battery EDISON LAMP CO. HARRISON N. J. dealers. POP SAFETY VALVE WATER RELIEF VALVE IMPROVED STEAM GAGE STEAM ENGINE INDICATOR Single Bell Chime Whistle and all instruments Starrett"s Patent Combination Square Prices from II1.25 IDEAL MUSICAL BOX Is the Latest Invention in Swiss Musical Doges NEW CATALOCUC Useful Beautiful and Cheap. MUNN & CO. Publishers 361 Broadway New York. It is Hard Dense and Ad Syracuse N. Y. Patent Foot Power Machiner

RM2AM2RAF–The Locomotive . ted to an automatic gas waterheater, controlled by a thermostatic valve. It had no relief valve and,as in the case first cited, a check valve prevented the pressure frombacking water out into the city mains. Apparently the thermostatfailed to close oflf the gas. The tank ripped open the full length ofthe welded longitudinal seam. While to anyone acquainted with pressure vessels it is obviousthat a relief valve is a necessity for safety, there are some systems —as the one about to be described — in which at first glance the need ofsuch a valve is not apparent. 90 THE LOCOMOTIVE

RM2ABX61J–POP SAFETY VALVE WATER RELIEF VALVE STEAM ENGINE INDICATOR STEEL TYPE for TYPEWRITERS Stencils Steel Stamps Rubber and Metal Type Wheels. STANDARD TYPEWRITER. Gold Medal-Paris Exposition 1889. REMINGTON NICKEL PLATING ZUCKER 8cLEVETT NOW READY. NICKEL ANODES NICKEL SALTS COM POSITION BUFFING WHEELS ELECTRO & NICKEL PLATING OUTFITS. BLOW-PIPE 5ETS OF CASTINGS OF MODEL ENGINES CATALOGUES FFt E E. BARNES" PAT FOOT POWER ACHINERY. ONL SEVEN D CATES IRON WORKS 50 C So. Clinton St. CHICAGO. Weather strip A. C. 42496 fWbverfigiernento. Back Page each insertion 81.00 a line. USE ADAMANT WALL

At almost every show I attend, I ask a few engine owners and operators if they are satisfied with their new-style safety valves. It would be only a small exaggeration to say that I get just two responses. “I have been using a new-style valve for 15 years and I haven’t had any trouble with it” or “They are junk!” I have cleaned up the second response to spare the reader the unpleasant expletives.

As the result of these conversations, I have attempted to understand why there is such a discrepancy between the reactions to modern safety valves. It now appears that there are a few simple steps we can take when purchasing and installing these valves that might improve our satisfaction with the new-style valves, which are the only ones currently available.

To understand the issues involved in the selection of a safety valve, it is necessary to review the history of safety valves used on hand-fired boilers. I am referring to hand-fired boilers rather than historical boilers because the issues are determined by how the boilers are fired, not how they are constructed or how old they are. The requirements for a modern welded boiler made to the American Society of Mechanical Engineers (ASME) code are the same as for a 100-year-old riveted boiler, if both boilers are hand-fired. The requirements for a safety valve for a boiler that is automatically fired are dramatically different.

With automatic firing, the safety valve’s function as defined by Anderson Greenwood Crosby, a manufacturer of modern safety valves, is to protect life and property if all other safety measures fail. A safety valve on a hand-fired boiler, as defined by ASME almost a hundred years ago, is to give notice of the highest pressure permissible and to give alarm that more water or less fuel is needed. (The evolution of the purpose of the safety valve is summarized in “The Purpose of a Safety Valve,” at the end of this article.)

When hand-fired boilers, such as found on traction engines, steam cranes and locomotives disappeared, most of the boilers that remained were automatically fired. The safety valve manufacturers adapted their designs accordingly. The old-style valves with bottom guided, beveled seats were capable of withstanding vibration and operating near their setpoint, and were replaced by smaller top-guided valves with flat seats.

At the same time, steam system designs were adapted so there was no need to operate within 10 percent of the setpoint of the safety valve. Not all old-style valves had beveled seats, but the ones that didn’t were designed much differently from the modern flat-seated valves.

When I speak of a modern-style safety valve, I am referring to a valve shown in the second diagram of this article’s image gallery. An example of an old-style safety valve can also be seen in the image gallery. Changes in the design of safety valves had a dramatic effect on their capacity in pounds of steam per hour. If a boiler built in 1920 required a valve capable of releasing 1,000 pounds of steam per hour at a pressure of 100 pounds per square inch, it would have been equipped with a 2-inch safety valve. Today, 3/4-inch valves are available to release that much steam at that pressure.

The evolution of the safety valve did not end with the development of the modern, flat-seated valve. In the last 20 years, the design of safety valves has continued to evolve.

In 1985, a new-style 3/4-inch valve set at 150 pounds per square inch could have a capacity of 1,497 pounds of steam per hour. In 2002 this same valve could have a capacity of 1,651 pounds of steam per hour.

From 1914 until 1998, the blowdown allowed by the ASME boiler code was 2 to 4 percent of the setpoint. In 1998, this was changed to allow the blowdown to be as high as 6 percent. Beginning with the 2004 ASME code, there is no limit on blowdown. The code has not required that the amount of blowdown be stamped on a safety valve since 1986.

When I asked owners and operators how well they liked their new-style safety valves, I was not aware of the need to ask about the age of the valve. Instead, I would ask about the amount of blowdown. In almost every case, the people who were satisfied had valves that would blowdown 4 percent or less. It appears that this is almost the same as if I had asked the age of the valve. If the valve were purchased prior to 1998, it would have been set for 4 percent blowdown. If purchased after that date, unless specified otherwise, it would have been set for 6 percent. The change from 4 to 6 percent causes a 50 percent increase in the amount the pressure changes in a boiler each time the valve pops. The resulting increase in the flexing of the components of the boiler may be associated with a corresponding increase in seepage at stay bolts and tubes.

When you order a new safety valve, you will need to provide four pieces of information: the setpoint, the capacity in pounds of steam per hour, the blowdown and the requirement that the valve be stamped with the ASME “V” stamp. If you specify the pipe size, you may get a valve with far too much capacity, as I have already explained. To determine the capacity you need, do not use the capacity stamped on the old valve. First, if the valve has been replaced, it might not be the right capacity. Secondly, the capacity stamped on the valve is probably the capacity of the smallest valve available and might be significantly larger than the required capacity.

As I talked to many owners, they would offer other comments regarding their valves. One comment I heard from several owners who were satisfied with the new-style valves was that their valves were larger in pounds per hour than the minimum required by the ASME code. I am not certain as to exactly how the capacity affects the operation of the valve. What I do know is the larger the valve, the more force it takes to raise it off its seat. The force of the steam on the boiler-side of the valve cannot overcome the force of the spring in the safety valve until the pressure in the boiler rises to the setpoint of the valve.

When this happens, the valve pops open. It seems the larger diameter, and thus the greater forces, may result in more stable operation of the valve near its setpoint. There is a concern in the boiler code that safety valves should not be so large that water is drawn out of the boiler. It would seem, because of the relatively small size of portable and traction boilers, the pressure would drop so quickly that little water, if any, would be lost. I have seen boilers where the owners have installed modern safety valves of the same pipe size as the old style valves installed by the factory. The capacity of these valves was far greater than I believe anyone would recommend, but I am not aware that they caused water to be discharged from the boiler. It is important to be careful when sizing a safety valve. I suggest owners talk to each other and share their experiences before making such a decision.

If you would prefer to have a top-discharge safety valve, which looks more authentic, shop around. They are available in a few sizes. You might also want to consider specifying that the valve have a non-metallic seat.

When installing a safety valve, do not install any fitting smaller than the inlet to the valve and do not install any kind of valve between the safety valve and the boiler. Examples of what not to do can be seen in the image gallery. Do not use a pipe wrench on a safety valve, it can damage or destroy the valve.

Once you have carefully selected your safety valve and have installed it on your boiler, it is important to verify the setpoint and the blowdown have been set according to your specifications. The first step in this process is to have the accuracy of your steam gauge checked with a dead-weight gauge tester. If your gauge does not agree with the setpoint of your new safety valve do not assume that the gauge is wrong.

Do not use the lifting