eagleburgmann mechanical seal catalogue quotation

Main catalog seal supply systems. The complete product portfolio of systems and components for cooling, flushing, pressurization and supplying liquid and gas-lubricated mechanical seals e.g., quench and thermosiphon systems, heat exchangers, barrier fluid systems, leakage monitoring and seal supply systems in accordance with API682.

Clean gas despite fluctuating operating conditions. The solution for preventing seal failures due to contaminated seal gas. Combined power cycle plant, Argentina.

Mechanical seals for agitators, mixers, dryers, kneaders and other special machines. The true all-rounders when it comes to aggressive, sticky or viscous media or when solids content is high.

Standardization of seals for over forty agitators from different manufacturers in an active ingredient production to dry-running agitator seal SeccoMix.

Main catalog seal supply systems. The complete product portfolio of systems and components for cooling, flushing, pressurization and supplying liquid and gas-lubricated mechanical seals e.g., quench and thermosiphon systems, heat exchangers, barrier fluid systems, leakage monitoring and seal supply systems in accordance with API682.

As versatile as the requirements of the oil and gas industry: Sealing solutions from EagleBurgmann for water and gas injection, midstrema processes, multiphase, FPSO, Subsea, oil sands mining and LNG.

As versatile as the requirements of the power industry: So are sealing solutions from EagleBurgmann in fossil fuel-fired, nuclear and renewable energy power plants.

Full range of EagleBurgmann products for Sohar refinery in Oman. Service agreement, mechanical seals for pumps and compressors, diaphragm couplings, compression packings and gaskets.

The innovative seal face coating for maximum operating performance of pumps, agitators and compressors in demanding applications. Features, applications and examples.

Introduction to state-of-the-art compressor seal technology, e.g. technical principle, basic seal arrangements and seal face coatings. Presentation of the complete EagleBurgmann range of dry gas seals, oil barrier seals and gas supply systems. References and services of EagleBurgmann.

Basic information about the API 682 4th edition. Contains a set of charts and summaries that gives a brief overview and represents a step-by-step method of specifying and selecting suitable EagleBurgmann sealing systems.

As versatile as the requirements of the refining industry: Sealing solutions from EagleBurgmann for distillation, cracking, gas processes, liquid and heavy hydrocarbons.

HR seals - the robust and economical solution for media with a high solids content. Advantages, products, operating conditions, references and finacial comparison.

1. The production environment of Lepu Burgmann Mechanical Seal Wholesale is required to be neat, clean, noise and dust free. Workers are required to wear dust suit in the work plant. During the operation, Lepu seals enjoy higher precision

Mechanical seals of the HJ92N series from EagleBurgmann are designed for media containing, solids or with high viscosity e.g. sugar, paper, sewage and waste water industry. The springs are product protected. There is no sticking or clogging making the design rugged and reliable. The seal is independent of direction of rotation.

LEPU SEAL is a professional supplier for mechanical seal products, focus in making mechanical seal since 1998, our mechanical seal products cover almost all range of the famous mechanical seal, like grundfos seal, flygt seal, burgmann seal, john crane seal, and apv seal, alfa laval seal, nissin pump seal, and so on.

Guangzhou Lepu machinery CO., LTD becomes one of the leading mechanical seal supplier in south of china, we focus in designing and manufacturing mechanical seal for many kinds of famous brand pumps, our mechanical seal cover many kinds of industry like food, petrol chemical, paper making, sea ship, and so on.

1. Guangzhou Lepu Machinery CO., LTD has been providing high-quality Burgmann Mechanical Seal Wholesale over the years. We mainly concentrate on the innovation of our products. Our produced eagleburgmann mechanical seal catalogue enjoys good warranty and maintaince period to be responsible for you.

3. Guangzhou Lepu Machinery CO., LTD has a workforce of highly skilled and reliable staff and talents for burgmann mechanical seal catalogue . Guangzhou Lepu Machinery CO., LTD is committed to becoming a comprehensive eagle burgmann mechanical seals for pumps provider with global influence. Inquire now!

Several factors play a role in the selection of a mechanical seal, the mechanical seal type, the materials used, and the manner in which a mechanical seal will be operated: process conditions, sealing point where the mechanical sealwill be used, operating conditions, and the medium to be sealed. Every system will only work as well as its individual components. If one mechanical sealfunctions smoothly, then it will lead a largely uneventful life. But as soon as the leakage rate rises or if the mechanical sealeven fails, its importance quickly becomes self-evident. Mechanical sealsare therefore very important in terms of process stability, plant safety, and economic viability.

The mechanical sealessentially consists of two flat, annular sliding surfaces that are pressed together. One sliding surface is fixed to the stationary machine casing, while the other sliding surface is fixed to the rotating shaft. The medium to be sealed, which is generally in contact with the outer edge of the sliding surfaces, penetrates the gap between the sliding surfaces, forming a lubricating film, and emerges at the inner edge as leakage. The pressure differential to be sealed is established in the radial direction. In its simplest form, a mechanical sealcan be imagined as a collar that is arranged on, and rotates with, the shaft.

A mechanical seal is a machine element made to seal the passage point of a rotating part (usually a shaft) through a wall (usually the machine casing). Features of the mechanical sealare two surfaces sliding on each other – usually arranged at right angles to the rotational axle – which are pressed together by axial forces. Between the sliding surfaces is a liquid or gaseous lubricating film.

Mechanical sealEagleBurgmann M7N, as frequently used in applications of the process industry, in the sector of water applications, or as used in the food industry.

Dynapro manufactures 100% interchangeable mechanical seals reaching the highest quality standards. Custom mechanical seals are available when your current sealing system isn"t getting the job done. For over 30 years we have been working with pumping systems, selections, redesigning, and technical support. Our experience has helped us save our customers millions of dollars on sealing systems. Here are some of the most popular mechanical seals we replace: John Crane: 58U, 59U, T8, T9, 32, 10T, 521, 2100 Series, Type 1, Type 2, Type 21, 87, R33, 58B, 59B, T8B, T9B, 502, 1648, 5610, 48V, FFET, 5615, 2648, Safebox SB 2, 5620, P200, 5625, Flowserve®: RO, SLC, QB, Type 84, P50, DHTW, SL500, BX, QBD, 86, P200, SL5200, X100, Eagle Burgmann®: M74, MG9, MG1 Series, M3N, M7N, H74, H12N, H7N, HJ92N, Cartex-SE, Mtex, Cartex-DE, Mtex-DE, Chesterton®: 441, 891, type 150, type 221, type ZFS, type 180, S10, A182, type 155, type 222, type 186, type 250, 225, type 280, S20, A2382, type 255, type 286

The ROTA-TECH Mechanical Seal range has been created to provide distributors the ability to support market demands for replacement mechanical seals and OEM mechanical seals.All designs have been created with a focus to remove common issues and failure causes, increase ease of fitting and deliver ultimate performance through use of high quality and carefully chosen materials.Our unique and extensive database of others mechanical seals quickly allows the identification of the required ROTA-TECH Mechanical Seal using only the OEM pump model or part numbers.

Technical information Mechanical seal selection by media Additional information

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 TotalSealCare . . . . . . . . . . . . . . . . . Outside back coverMedia tables . . . . . . . . . . . . . . . . . .Inside back cover Short legend . . . . . . . . . . .Fold-out page at back cover Company profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Additional product lines . . . . . . . . . . . . . . . . . . . . . .50

EagleBurgmann Your System Supplier Mechanical seals, Magnetic couplings Important noteSeparately available brochures offer information Catalog 150 pages (Code: DMS_MSE)about additional product lines as well as notes on the All the technical specifications are based on extensivetechnology and selection of mechanical seals. tests and our many years of experience. However, the The complete range of seals from EagleBurgmann: diversity of possible applications means that they canAll products can be retrieved interactively from serve as guide values only.eagleburgmann.com. Among others, you will find Pump seals, agitator seals, compressor seals, andcurrent data sheets in PDF format available for magnetic couplings. It should be noted that the extremal values of eachdownload here. operating parameter cannot be applied at the same time because of their interaction. Furthermore, the operating range of each specific product depends on the respective shaft diameter, materials used, mode of operation and on the medium to be sealed.

A guarantee can only be given in the individual case if the exact conditions of application are known and these are confirmed in a special agreement. When criticalSeal supply systems Carbon floating ring seals conditions of operation are involved, we recommend consulting with our specialist engineers. Brochure 32 Pages (Code: EBES)Brochure 84 Pages (Code: DMS_SSE) Subject to change.

Maintenance-free, compact cartridge labyrinth seals withThe entire product portfolio of systems and components long service life and best performance fromfor the cooling, flushing, pressurization and supplying of EagleBurgmann-Espey. For the sealing of gases, dust andliquid and gas-lubricated mechanical seals, e.g. quench vapors in turbines, fans, compressors, centrifuges andand Thermosiphon systems, heat exchangers, buffer mills.pressure systems, leakage monitoring andAPI682-compliant supply systems.

EagleBurgmann products deliver safe, reliable sealing The EagleBurgmann portfolio: performance in any application including oil pumping and A product range with an unlimited horizon. cracking, gas compression, process gas containment, EagleBurgmann is one of the worlds leading phase separation or synthesis of chemical substances, manufacturer of industrial sealing solutions. Our pipeline sealing, dairy product filling or compensation extensive portfolio includes everything from standard oftemperature expansion in flue gas systems. seals to one-off application-specific designs:

Our challenge is to design seals that are able to Mechanical seals withstand a wide range of media, different aggregate Magnetic couplings states and varying pressure and temperature and to Seal supply systems provide special solutions for small installation up to seal Carbon floating ring seals contact areas of several meters. Every application has its Compression packings own special requirements profile, and our job is to Gaskets provide the best sealing solution. Expansion joints Special products TotalSealCare Services

Total commitment to quality excellence. Outstanding quality is the top priority at EagleBurgmann. Our products are designed for user-friendly installation, optimal functionality and long service life. Our R&D activities, advanced quality management system, in-house test facilities and in-depth engineering expertise ensure that our seals meet the most demanding customer expectations. Starting right back in the development phase, our employees continually verify the quality of our products, and we carry out systematic inspection and testing to guarantee that customers are getting top quality.

Proud of the trust which our customers place in us. EagleBurgmann is a dependable, competent partner. Our customers are always in total control of the media in their pumps, agitators, compressors, blowers, turbines, valves and pipeline systems even when operating conditions are extremely harsh. There is good reason why customers in the oil & gas, refinery, chemical, energy, food processing, paper, water, marine, aerospace, mining and other industries choose EagleBurgmann as their sealing solutions supplier.

In this brochure we collected some important Additional options for agitator seals . . . . . . . . . . . . . . . 7 and interesting technical information about the Axial run-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 mechanical seals section. You can find besides Balance ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 technical basic information notes on design, Barrier medium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 installation and operation and also useful theoretical Circulation Systems to API 682 . . . . . . . . . . . . . . . . . 18 articles. In case of any queries, please do not hesitate Coatings for sliding faces . . . . . . . . . . . . . . . . . . . . . 11 to contact us. Code system for agitator seals . . . . . . . . . . . . . . . . . . . 7 Code system for API 682 seals . . . . . . . . . . . . . . . . . 21 Code system for mechanical seals . . . . . . . . . . . . . . . . 7 Coefficient of friction . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Concentricity tolerance . . . . . . . . . . . . . . . . . . . . . . . . 15 Conical spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Cooling water requirements . . . . . . . . . . . . . . . . . . . . . 9 DiamondFace. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Gap width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Gas-lubricated seals principle. . . . . . . . . . . . . . . . . . . 13 Heat transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Leakage rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Load factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Mechanical seal installation . . . . . . . . . . . . . . . . . . . . 16 O-Ring extrusion characteristics . . . . . . . . . . . . . . . . . 13 Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Pressure vessel regulations . . . . . . . . . . . . . . . . . . . . 17 Prior to installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Pumping screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Screw locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Seal supply systems. . . . . . . . . . . . . . . . . . . . . . . . . . 17 Seat locking to EN 12756 . . . . . . . . . . . . . . . . . . . . . 12 Shrink disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Sliding pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Sliding velocity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Super-Sinus spring . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Surface finish. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Surface roughness . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 TTV O-Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Turbulence losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Types of drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Vapor curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5 Technical informationSymbols Mechanical seals according to EN 12756 (code system)A Area of sliding face For single mechanical seals there is a distinction drawn between standard (N) and short (K) types. For doubleAH Area hydraulically loaded by medium pressure mechanical seals (back-to-back) EN specifies the short type only.b Width of sliding facec Specific heat capacityD Outer diameter of sliding face Single seald Inner diameter of sliding face Designation Description Position 1 2 3 4 5Da Outer diameter of bellowsdH Hydraulic diameterDi Inner diameter of bellows

Seal face Stationary seat Secondary seals Spring Other metal parts (except seal cover and shaft sleeve) N = standard type with l1Ndm Mean diameter of sliding face K = short type with l1KDw Diameter of shaft (C = type C)*f Coefficient of friction U = no shaft stepFf Spring force B = with shaft step (C = 0)*h Gap widthH Delivery head of pumping screw Nominal diameters d1 and d10 of the mechanical seal Shaft/shaft sleeve diameters are always three-digit numbersk Balance ration beneath the stationary seat for types U and Bk1 Pressure gradient factorn Speed Direction of rotation of the mechanical seal Type N and K (Type C)*p1 Medium pressure (is also the spring winding direction)p2 Atmosphere pressure R = clockwise Looking from the stationary seat toward the seal face Looking from the drive side with the shaftp3 Buffer fluid pressure with the seal face rotating in clockwise direction rotating in clockwise directionp p1p2; p3p1; p3p2 L = anti clockwisepf Spring pressure Looking from the stationary seat toward the seal face Looking from the drive side with the shaftpG Sliding pressure with the seal face rotating in anticlockwise direction rotating in anticlockwise directionpr Calculated load for the frictional force of the S = independent of direction of rotation secondary seal Spring type (state single spring or multiple springs in your order)PR Power consumption of sliding faces Finned stationary seatPV Turbulence loss through rotating parts 0 = no torsion lock, without anti-rotation pinV Delivery rate 1 = with torsion lock, with anti-rotation pin (2 = for type C)*Q Mechanical seal leakage rateRa Mean roughness index (calculated) Materials (see inside end cover of manual for the material code)t,T Temperature of the medium to be sealedT Rise in temperature of the medium to be sealedt3 Temperature of the buffer medium Double sealvg Sliding velocity Designation Description Position 1 2 3 4 5 1 2 3h Dynamic viscosityk Load factorr Density Seal face inboard Stationary seat inboard Secondary seals inboard Spring Other metal parts Sliding face outboard Stationary seat outboard Secondary seals outboardn Kinematic viscosity U = no shaft step B = with shaft step (C = type C)* } on product side

Range (M45 56) Additional options 0 basic design 1 leakage drain Features1) 2 cooling flange K = internally balanced 4 leakage drain + cooling flange (pressure from the inside) L = with bearing F = pumping screw Drive U = for bottom entry 1 set screw 2 shrink disk 3 clamping collar Type 4 key D = double seal 5 flange (shaft sleeve) 6 shaft sleeve with flange and key 1) Ifmore than one feature apply, the code 7 clamping set letters are listed one after the other. 8 muff coupling N.B.: The code system published in DIN 9 customer-specification 28138 Part 3 can also be used to describe and order DIN agitator seals.

CoolingKhlflansch EagleBurgmann or heating flange EagleBurgmann Leckabzug Leakage drain or flushEagleBurgmann EagleBurgmann

7 Technical informationBalance ratio Sliding pressure pGThe balance ratio is a non-dimensional factor of the The term sliding pressure is understood to be the surface sealing gap geometries which converge in leakagemechanical seal and is defined as pressure on the two sealing faces which remains after direction V-gap for externally pressurized seals the subtracting all those forces that act on the seal face and value of k1 is > 0.5, while for sealing gap geometries which are balanced by hydraulic pressures. The sliding which diverge in leakage direction A-gap for externally pressure is conditional on the pressure differential to be pressurized seals the value of k1 < 0.5. For simplified sealed, the balance ratio, the pressure conditions inside calculations the value of k1 is generally taken to be 0.5. the sealing gap i.e.gap between the seal faces (pressure Under unfavourable conditions the sliding pressure can gradient factor) and the spring pressure. The pressure become negative, causing the sealing faces to open gradient factor k1 can assume values between 0 and 1, resulting in excessive leakage. depending on the geometry of the two sealing faces. For

unbalanced k >1 Coefficient of friction f Unbalanced k>1 The coefficient of friction f is conditional on the materials improved conditions of lubrication, e. g. due to partial that are in contact, the medium being sealed, the sliding build-up of hydrodynamic pressure in the sealing gap. On velocity and the design-related conditions of contact the other hand, when a mechanical seal is run under Flaechenverhaeltnis belastet between the sliding faces. For general considerations and purely hydrodynamic conditions of operation, the EagleBurgmann calculations, a coefficient of friction of between 0.05 and coefficient of friction will rise as the speed increases AH A 0.08 can be applied as a good approximation. As can be similar to hydrodynamic bearings. seen in the graph, a lower value is obtained under

EagleBurgmannwill increase, but the mechanical seal may also lift off 0,3more easily. 0,2 0,1 lI)) PPusher O-Ring seal seal 0,05 0,03 0,02 0,01 109 2 3 5 108 2 3 5 107 2 3 5 106 2 3 5 105 2 3 5 104 Hydrodynamic coeff. (G) G=

Gap width h Load factor ll ) Bellows seal Seals with contacting faces The balance ratio is just a non-dimensional factor used to In contact seals with a theoretically parallel sealing gap, assess a mechanical seal. A second one is the load factor the distance between the two sealing faces is conditional . on the roughness of the surfaces. Numerous measurements Reibungszahl F EagleBurgmann taken in the laboratory and in practice with due allowanceUnlike an O-Ring seal, the hydraulic diameter of a bellows for external factors indicate that a mean gap width of lessseal is not a fixed geometric value. It is also influenced by than 1 mm can be used as a basis for calculating thethe absolute level of the pressure to be sealed and by the normal degree of leakage.direction of pressurization (internal or external pressure). FlaechenverhaeltnisBalg The balance ratio and the load factor are practically EagleBurgmann Seals with non-contacting faces identical when the pressure differentials to be sealed are Hydrostatically or hydrodynamically balanced, non-contacting large. The friction at the dynamic secondary seals pr is mechanical seals adjust automatically to a defined gap usually disregarded in the calculation. width during operation. The width of the gap depends mainly on the shape of the gap in radial as well as circumferential direction, on the operating conditions and on the medium.

8Surface roughness Turbulence losses Pv The turbulence-related consumption of power is not significant until the circumferential speed reaches 30 m/s Roughness 10 m 5 m 1 m 0,1 m Degree of precision turned ground tapped polished Degree ofinroughness in Roughness (98 ft/s). It must be given due consideration particularly relationto to the percentage relation with special seals. thebearing percen- tage bearing Heat transfer The total power consumption of a mechanical seal has to Percentage be dissipated into the medium or the buffer fluid by means bearing area 4% 12 % 40 % 95 % of appropriate measures in order to stop the seal from overheating. The necessary fluid flow rate for removal of the power losses is calculated by

Under certain conditions of installation or operation heatTungsten carbide, nickel-bonded: 0,01 m Carbon graphite: 0,10 m may pass from the product to the sealing compartmentSilicon carbide (SiC): 0,04 m Aluminium oxide: 0,15 m and will need to be taken into account when calculatingSpecial cast Cr-steel: 0,15Roughness m EagleBurgmann C-SiC-Si/C-SiC: 0,15 m the circulation rate.

The lower the roughness value, the higher the percentage bearing area and hence the higher load capacity of a mechanicalseal.Sliding velocity vgThe sliding velocity is usually quoted in relation to the mean sliding face diameter.

Dw = 20 mm Dseals (PN w = 30 mm 40)

0 4 8 12 16 .5 1 5 10 50 100 1,000 10,000 0 4 8 12 16 5 10 50 100 1.000 10.000 p [ bar] PR [W] p [bar] PR [W] Differential pressure to be sealed Power consumption through friction Differential pressure to be sealed Power consumption through friction

*Example M7: Example M48-D:p = 5 bar p = 14 barDw = 100 mm Dw = 50 mmn = 1,000 min1 n = 100 min1 13Reibleistung M48D EagleBurgmannPR = 310 W PR = 70 W* unbalanced rotating seal Reibleistung M7 EagleBurgmann Low-duty agitator seals (PN 16)

4 12 20 28 36 .5 1 5 10 50 100 1,000 10,000 4 12 20 28 36 44 5 10 50 100 1,000 10,000 p [ bar] PR [W] p [bar] PR [W] Differential pressure to be sealed Power consumption through friction Differential pressure to be sealed Power consumption through friction

*Example H7: Example HS-D:p = 20 bar p = 32 barDw = 70 mm Dw = 50 mmn = 1,000 min1 n = 100 min1PR = 215 W 11Reibleistung H7 EagleBurgmann PR = 195 W 14Reibleistung HSD EagleBurgmann* balanced rotating seal Heavy-duty agitator seals (PN 40) Power consumption The total power consumption of a mechanical seal is calculated from Atmosphere 60 side The power consumed by the sliding faces. 60 50 50 40 The power consumption due to turbulence created by the rotating parts. 40 60 m in 1 00

0 5 10 15 20 5 10 15 20 5 10 15 20 50 125 250 500 1,250 2,500 5,000 p [ bar ] Differential pressure to be sealed Power consumption through friction

Balanced stationary seal of the HRC series10Surface technology for sliding facesCombinations of face materials such as carbon graphite/ DiamondFace DLC (Diamond-Like-Carbon)SiC and SiC/SiC have proven excellently suitable for use in The introduction of DiamondFace by EagleBurgmann in This hydrogenated amorphous carbon coating (a-C:H),mechanical seal technology, but permanently problem-free 2007 was a milestone in the history of mechanical seal applied by plasma enhanced chemical vapour depositionfunctioning also requires adequate lubrication in the technology. A micro-crystalline layer, which has all the (PECVD), features excellent wear protection and frictionsealing gap or, where gas-lubricated mechanical seals are attributes of natural diamond, is applied to the seal faces reduction for silicon carbide seal faces. The high hardnessconcerned, contactless operation. by means of a chemical vapor deposition (CVD) process and the specially designed surface offer great protection in a vacuum reactor at a temperature of 2,000 C (3,632 against scoring. DLC is used as standard coating forDry running as result of inadequate lubrication or, in the F). Developed in cooperation with the Fraunhofer Institute silicon carbide seal faces and is only surpassed by thecase of gas seals, contact between the sliding faces for Surface Engineering and Thin Films in Braunschweig/ extraordinary properties of the DiamondFace coating. Induring operation, leads to massive temperature increases Germany, the process produces high coating thicknesses terms of material properties, the a-C:H DLC coating is toand possible damage to the sliding faces and secondary and an extremely even seal face. Coating adhesion classify between diamond and carbon graphite.seals. exceeds all known requirements in practical application. DM-TiN Titanium NitrideIn order to significantly extend the service life and Seal faces with DiamondFace coatings are extremely The DM-TiN titanium nitride coating (Standard: 1.4006/reliability of such seals or enable their use under extreme hard and wear-resistant, and exhibit low friction, excellent SU410, Japanese patent no. 2134661) is applied byconditions in the first place, EagleBurgmann offers three heat conductivity and extremely high chemical resistance. means of an ion beam mixing process, and exhibits out-special sliding face coatings, namely DiamondFace, The technology increases the service life of mechanical standing microhardness and excellent adhesive propertiesDiamond-Like-Carbon (DLC) and Titanium Nitride seals used in pumps, agitators and compressors many due to the fact that it penetrates the metal and forms a(DM-TiN). Each of these coatings has its own particular times over. Time between maintenance calls increases tight metallurgical bond.strengths, and which of them is to be used depends on the considerably, and lifecycle costs are reduced significantly.application for which it is intended. Titanium nitride coatings are used as start-up protection for metallic seal faces on compressor seals (e. g. MDGS). DM titanium nitride/carbon graphite combinations have a good friction coefficient and exhibit excellent emergency running properties.

Leakage rate QCalculated rates of leakage and power losses are notguaranteed values. They are statistical and calculated Formula for externally pressurized mechanical sealsmean values which are determined on the basis ofexperience and extensive testing. The leakage rates andpower losses which actually arise in a particular seal canbe several times higher on account of factors that areimpossible to quantify theoretically. As can be seen fromformula, the leakage rate is mainly conditional on theactual gap width during operation. This depends in turn onmany factors (see also gap width). Example calculation for a H7N/48 sealFactors influencing leakageThe major factors with an influence on a mechanical sealsleakage rate, correct functioning and reliability include:

Machined finish of the sliding faces Flatness of the sliding faces and flatness deviations caused by thermal or pressure-induced deformations Machine vibrations or stability Mode of operation of the plant Characteristics of the medium to be sealed Correct installation of the mechanical seal

l o 180 Ethane Seat locking eEagleBurgmann

Gegenringsicherung2 Seat locking 2 EagleBurgmann EagleBurgmann ne

U B U EagleBurgmann B ne

48 53 68 73 72 77 2.0 6 6 63.5 Pressure abs. [ bar ] 50 55 70 75 75 86 2.5 6 6 67.5 53 58 73 83 77 88 2.5 6 6 70.6 55 60 75 85 86 91 2.5 6 6 72.6 58 63 83 88 88 93 2.5 6 6 75.6A sealing system for hydrocarbons must often make allowance for partial dry running due 60 65 85 90 91 96 2.5 6 6 77.6to their low boiling points. However with the right design features and face materials, it is 63 68 88 93 93 98 2.5 6 6 80.6 65 70 90 95 96 103 2.5 6 6 82.6possible to guarantee failsafe operation of the mechanical seal. The operating temperature 68 93 98 6 88.6must be at least 5 K lower than the boiling point under operating pressure. 70 75 95 104 103 108 2.5 7 6 90.2 75 80 104 109 108 120 2.5 7 6 95.2 80 85 109 114 120 125 3.0 7 6 103.0 85 90 114 119 125 130 3.0 7 6 108.0 90 95 119 124 130 135 3.0 7 6 113.0 95 100 124 129 135 140 3.0 7 6 117.5 100 105 129 134 140 145 3.0 7 6 122.5 * not applicable for seats made of carbon

12Extrusion characteristics of elastomeric O-Rings Functional principle gas-lubricated sealsThe extrusion resistance of elastomeric O-Rings can be In its basic design and mode of operation, thegreatly enhanced by the use of support rings. EagleBurgmann Gas Seal is the same as a conventional mechanical seal except for two differences: a) the sliding faces are wider, and b) they are lubricated by gas rather 600 than liquid. This is assured in outstanding manner by the sophisticated 400 geometry of V- and U-grooves in the sliding faces. Even 300 at low speeds a stable gas film develops in the sealing 200 gap to separate the sliding faces and guarantee Working pressure [ bar ]

non-contacting, wear-free operation, at a minimum level of Extrusion power consumption that is 95 % below that of 100 liquid-lubricated seals. 80 60 Elaborate buffer fluid oil systems for the lubrication and cooling of double seals are superfluous. Gas pressurization 40 at a level of around 5 to 10 % above product pressure 30 No Extrusion (p1) makes sure that no process medium can escape to 20 the atmosphere. A small gap height of approximately 3 m between the sliding faces results in minimum consumption Hardness Shore A 70 80 90