leser safety valve catalogue free sample

2023-05-21 21:22:12

The primary purpose of a safety valve is to protect life, property and the environment. Safety valves are designed to open and release excess pressure from vessels or equipment and then close again.

The function of safety valves differs depending on the load or main type of the valve. The main types of safety valves are spring-loaded, weight-loaded and controlled safety valves.

Regardless of the type or load, safety valves are set to a specific set pressure at which the medium is discharged in a controlled manner, thus preventing overpressure of the equipment. In dependence of several parameters such as the contained medium, the set pressure is individual for each safety application.

leser safety valve catalogue free sample

The primary purpose of a pressure relief valve is to protect life, property and the environment. Pressure relief valves are designed to open and release excess pressure from vessels or equipment and then close again.

The function of pressure relief valves differs depending on the main type or loading principle of the valve. The main types of pressure relief valves are spring-loaded, weight-loaded and controlled pressure relief valves.

Regardless of the type or load, pressure relief valves are set to a specific set pressure at which the medium is discharged in a controlled manner, thus preventing overpressure of the equipment. In dependence of several parameters such as the contained medium, the set pressure is individual for each safety application.

leser safety valve catalogue free sample

Safety valves from the API product group meet all the requirements of API 526 such as standardized capacity, nominal diameter, and center to face dimensions which offers 100% compatibility. Because of their robust construction, they are especially suitable for being constructed from special materials such as Duplex, Monel, and Hastelloy.

API 526 is a purchase specification in which the nominal diameters, flange pressure ratings, center to face dimensions, flow areas, body and spring materials and their service limits are stipulated for "API safety valves" API safety valves are used worldwide in the petrochemical industry, both on- and off-shore. These applications are characterised by standardised plants, blow-down systems and long pipework sections. The LESER type 526 combines the requirements of the API standards and the ASME Code with the tried and tested service reliability of the LESER range.

Safety valves from the Clean Service product group were specially developed for the food, beverage, and pharmaceutical industries and meet all the relevant standards and regulations such as DIN 11866 or ASME BPE. With a low deadspace inlet area, the unique LESER HyTight assembly, and the optional pneumatic lifting device you have very good cleanability (CIP, SIP). With a large selection of aseptic connections (threaded, flanged, or clamped) the valve can be optimally fitted to different requirements.

The safety valves of the 48x series can be fitted with manually lockable lifting devices H4 to hold open at a small lift, and with pneumatic lifting devices H8 for automated systems (CIP process).

Safety valves from the High Performance product group offer especially high capacity for their size. With a large quantity of nominal diameters (DN), pressure ranges and product options, they have proven themselves as a universal safety valve for many applications.

Full Flanged Safety Valves with Flanged Connections open rapidly to the full design lift.They are used in particular for vapours and gases, in applications where the maximum mass flow has to be discharged rapidly. LESER type 441 is suitable for almost any industrial application, and are worldwide one of the best selling spring-loaded flange type safety valves.

Type 441 ANSI: Cast steel construction with ANSI flanges. Two body materials: stainless steel and cast steel. Center to face length in accordance with API 526, greater discharge capacity than standard API valves.

PTFE-lined safety valves from the Critical Service product group are utilized for highly corrosive media such as chlorine, acids, and lyes. With their highly resistant lining they offer a safe solution for corrosive media.

The product group Compact Performance includes threaded and flanged safety valves with compact dimensions for economical protection of small and midsized capacites. Due to its many orifice diameters, seals, and connections this product group offers a very wide area of application.

Type 437:Safety relief valve spring loaded for small mass flows (e.g. thermal expansion and overflow). Body material: stainless steel, 430 chrome steel.

Type 459/462Full lift safety valve spring loaded for the medium mass flow range (e.g. small scale or pilot plant). Two body materials: stainless steel or steel.

Change-over valves from the Best Availability product group increase plant availability.Change-over Valves are used when a plant shutdown is impossible or undesirable for process engineering or commercial reasons. With change-over valves, it is possible to switch over between parallel safety valves without interrupting operation, so as, for example, to perform maintenance work. The design of the change-over valves ensures: low pressure losses on discharge flow (3% criterion) adequate open passage in any position during the change-over process stable operation of the downstream safety valves The combination of LESER change-over and safety valves has been comprehensively tested on full flow test labs.

Safety valves from the Modulate Action product group feature a standard or proportional opening characteristic. They minimize medium loss when opening and are used for protection from pressure peaks, thermal relief, and liquids.

Relief and Safety Relief Valves with Flanged Connections are ideal relief valves for medium mass flows. Their large proportional range leads to consistent functioning and relief of pressure peaks, particularly with liquids. Both proportional and safety relief valves are characterized by particularly stable operation.

leser safety valve catalogue free sample

High Performance LESER worldwide Performance LESER UK LESER Germany André Ramseyer AG LESER China Bristol sales@leser.co.uk Hamburg and Hohenwestedt Flamatt, Switzerland info@ramseyer.ch Tianjin, Beijing, Shanghai and Shenzhen Flanged Safety Relief Valves sales@leser.com sales.china@leser.com Series 441 Series 441 Full nozzle Series XXL LESER Poland Poznan leser@leser.pl

LESER USA LESER France Series 444 Charlotte (NC) salesus@leser.com Toulouse contact@leser.fr LESER Singapore Series 458 Singapore sales@leser.com.sg

LESER Brazil Rio de Janeiro vendas@leser.com.br LESER Bahrain LESER UAE LESER India Al Manamah Dubai Mumbai and Paithan salesme@leser.com sales.uae@leser.com sales@leser.co.in

High Performance Catalog Edition July 2016 / 3.000 0777.5465 CATALOG The-Safety-Valve.com The-Safety-Valve.com LESER GmbH & Co. KG 20537 Hamburg, Wendenstr. 133-135 Fon +49 (40) 251 65-100 E-Mail: sales@leser.com 20506 Hamburg, P.O. Box 26 16 51 Fax +49 (40) 251 65-500 www.leser.com

High_Performance_World_format_Umschlag.indd 1 14.07.2016 11:49:18 Valve finder How to find the right Product Group

Safety Valves API API specified Yes application?

Steam, gas and liquid application Modulate Yes with low capacity in relation Action to valve size?

Required Orifice letter? Compact Performance Orifice ≤ F over valve

Type 441, 442 DIN General Type 441, 442 XXL 51 Valve finder 2 Materials General Information 4 • Conventional design 52 • Balanced bellows design 54 Article numbers 56 Type 441, 442 DIN 7

Type 455, 456 Article numbers 92 Series 441, Series 441 Full nozzle 48 Dimensions and weights 93 Approvals 48 Pressure temperature ratings 95 Available options 49 Flange drillings 97 LESER Original Spare Parts Kits 50 Flange facings 98 Approvals 99 Type 457, 458

 High capacity related to the safety valve size  High adaptability  Excellent price / performance ratio

• Are designed to meet all industrial applications. • Open rapidly with an overpressure of 5 % to the full design lift. • Are used particularly for vapours and gases where the maximum mass flow has to be discharged rapidly. • Have a maximum blowdown of minus 10 % for steam/ gas service and minus 20 % for liquid service. • Are one of the best selling spring loaded safety valve worldwide. • Are developed in a close cooperation with plant engineers and service specialists. • Serve for protection of processes and equipment. • Are approved by all important approval organisations world- wide which ensures the worldwide applicability e.g.:

Furthermore, all LESER High Performance safety valves are designed, marked, produced and approved acc. to the requirements of the following regulations (directives, codes, rules and standards).

Typical applications for • 14 valve sizes from DN 20 to DN 400 – 3/4" to 16" LESER High Performance Safety Valves are: provide a high connectivity to the application • Inlet pressure ratings PN 16 to PN 400 / class 150 to Series 441 class 2500 to fit all required design pressures • Protection of chemical processes and equipment • Orifice sizes from E to > 3 x T cover all capacity (e.g. distillation columns) requirements • Heat exchangers • Large variety of body materials; e.g. • Low and medium pressure steam • 0.6025 / grey iron • Blowers and turbo compressors • 0.7043 / ductile iron • 1.0619 / WCB Series XXL • 1.4408 / CF8M • Low pressure steam at big power stations • 1.7357 / WC6 • Capacities beyond the limits of API and Series 441 can be selected acc. to the application

Series 444 • Set pressures from 0.1 to 300 bar / 1.5 to 4350 psig • OEM in dying machines or filter constructions make this product group suitable for all industrial processes • Stainless steel applications up to 16 bar / 232 psig • Operating temperatures from -270 to 550 °C / -454 to 1022 °F cover a wide range of applications Series 441 Full Nozzle • LESER Nanotightness as standard for metal-to-metal seal- • Same applications like Series 441 when ings. The nanotightness exceeds the requirements for func- full nozzle design is preferred. tional tightness of API 527 by 50% which means e.g. less • Special requirement for nozzle material pollution when discharge to atmosphere, 50% reduction in medium loss and increased plant efficiency Series 458 • One design and spring (single trim) for steam, gas and liquid applications reduces the number of spare parts and • Power stations and industrial superheated ensure an easier maintenance steam generation • High capacity compared to the API requirements to reduce • Required flange classes ≥ PN 63 / CL600 installation costs • Protection of high pressure Chemical processes, • Ringless design needs no trim adjustments e.g. NH3 synthesis, CO2 extraction for easy maintenance • Desalination plants • One-piece spindle reduces friction which is leading to high operation accuracy • Self-draining body design, avoids residues and reduces corrosion

LESER – High Performance Safety Valves can be customized with a great variety of options, e.g.

High_Perf_World_format_EN_Print.indd 6 19.07.2016 13:05:19 Type 441, 442 DIN Type 441, 442 DIN Flanged Safety Relief Valves

Series 441, Series 441 Full nozzle Approvals 48 Available options 49 LESER Original Spare Parts Kits 50

- Modiﬁcations reserved by LESER - If several materials are speciﬁed LESER deﬁnes the material. - LESER can upgrade materials without notice. - Every part can be replaced by other material acc. to customer specification.

Type 441, 442 DIN DNI 20 20 25 32 40 50 65 80 100 125 150 200 DNO 32 40 40 50 65 80 100 125 150 200 250 300 Valve size – 3 /4" x 11/2" 1" x 11/2" 11/4" x 2" 11/2" x 21/2" 2" x 3" 21/2" x 4" 3" x 5" 4" x 6" 5" x 8" 6" x 10" 8" x 12" Actual Oriﬁce diameter d0 [mm] 18 18 23 29 37 46 60 74 92 98 125 165 Actual Oriﬁce area A0 [mm2] 254 254 416 661 1075 1662 2827 4301 6648 7543 12272 21382 Body material: 0.6025 (cast iron) PN 10 * * * * * * * * * * PN 16 Inlet DIN EN 1092 body material 1.0619 * * * * * * * * * *

Steel flange only Tongue face C1) H94 H92 1) Groove face D H93 H91 Male face E H96 H98 Female face F H97 H99 O-ring male face G J01 J02 O-ring female face H J03 J04 Acc. to ASME B16.5 Smooth finish2) Serrated finish RTJ-groove Inlet Outlet Inlet Outlet Inlet Outlet Body material Inlet Outlet RTJ- Option RTJ- Option Option code Option code Class code Class code 1.0619, 1.4408 all all L52 L53 CL150 H62 CL150 H63 * * 1) LESER manufactures the groove at ﬂanged valves by milling. If a customer demands a turned surface in the soil of the groove according to DIN EN 1092-1 an additional option code is necessary: “S01: soil of the groove drilled”. 2) Smooth ﬁnish is not deﬁned in the effective standards.

High_Perf_World_format_EN_Print.indd 20 19.07.2016 13:05:32 Type 441, 442 ANSI Type 441, 442 ANSI Flanged Safety Relief Valves

Series 441, Series 441 Full nozzle Approvals 48 Available options 49 LESER Original Spare Parts Kits 50

Valve size 1" x 2" 1½" x 2" 1½" x 2½" 2" x 3" 3" x 4" 4" x 6" Actual Oriﬁce diameter d0 [mm] 23 29 37 46 60 92 Actual Oriﬁce area A0 [mm2] 416 661 1075 1662 2827 6648Type 441, 442

Valve size 1" x 2" 1½" x 2" 1½" x 2½" 2" x 3" 3" x 4" 4" x 6" Actual Oriﬁce diameter d0 [mm] 23 29 37 46 60 92 Actual Oriﬁce area A0 [mm2] 416 661 1075 1662 2827 6648

Valve size 1" x 2" 1½" x 2" 1½" x 2½" 2 x 3" 3 x 4" 4 x 6" Actual Oriﬁce diameter d0 [inch] 0.91 1.14 1.46 1.81 2.36 3.62 Actual Oriﬁce area A0 [inch2] 0.644 1.024 1.667 2.576 4.383 10.304Type 441, 442 ANSI

Valve size 1" x 2" 1½" x 2" 1½" x 2½" 2 x 3" 3 x 4" 4 x 6" Actual Oriﬁce diameter d0 [mm] 23 29 37 46 60 92 Actual Oriﬁce area A0 [mm2] 416 661 1075 1662 2827 6648

Valve size 1" x 2" 11/2" x 2" 11/2" x 21/2" 2 x 3" 3 x 4" 4 x 6" Actual Oriﬁce diameter d0 [inch] 0.91 1.14 1.46 1.81 2.36 3.62 Actual Oriﬁce area A0 [inch2] 0.644 1.024 1.667 2.576 4.383 1.304Type 441, 442

Valve size 1" x 2" 1½" x 2" 1½" x 2½" 2" x 3" 3" x 4" 4" x 6" Actual Oriﬁce diameter d0 [mm] 23 29 37 46 60 92 Actual Oriﬁce area A0 [mm2] 416 661 1075 1662 2827 6648

Steel flange only Tongue face C1) H94 H92 Groove face D1) H93 H91 Male face E H96 H98 Female face F H97 H99 O-ring male face G J01 J02 O-ring female face H J03 J04 Acc. to ASME B16.5 Smooth finish2) Serrated finish RTJ-groove Inlet Outlet Inlet Outlet Inlet Outlet Body material Inlet Outlet RTJ- Option RTJ- Option Option code Option code Class code Class code 1.0619, 1.4408 all all L52 L53 CL150 H62 CL150 H63 * * 1) LESER manufactures the groove at ﬂanged valves by milling. If a customer demands a turned surface in the soil of the groove according to DIN EN 1092-1 an additional option code is necessary: “S01: soil of the groove drilled”. 2) Smooth ﬁnish is not deﬁned in the effective standards.

High_Perf_World_format_EN_Print.indd 32 19.07.2016 13:05:37 Type 441, 442 Full nozzle Type 441, 442 Full nozzle DIN Type 441, 442 Full nozzle ANSI Flanged Safety Relief Valve

Series 441, Series 441 Full nozzle Approvals 48 Available options 49 LESER Original Spare Parts Kits 50

Type 441, 442 Full nozzle ANSI Valve size 1" x 2" 1½" x 2" 1½" x 2½" 2" x 3" 3" x 4" 4" x 6" Actual Oriﬁce diameter d0 [mm] 23 29 37 46 60 92 Actual Oriﬁce area A0 [mm2] 416 661 1075 1662 2827 6648 Body material: 1.0619 (WCB) Bonnet H2 Art. No. 4412. 1282 1292 1302 1312 1322 1332 closed H3 Art. No. 4412. 1283 1293 1303 1313 1323 1333 H4 Art. No. 4412. 1284 1294 1304 1314 1324 1334 open H3 Art. No. 4422. 1285 1295 1305 1315 1325 1335 Body material: 1.4408 (CF8M) Bonnet H2 Art. No. 4414. 5682 – 5702 5712 5722 5732 closed H4 Art. No. 4414. 5684 – 5704 5714 5724 5734

Valve size 1" x 2" 1½" x 2" 1½" x 2½" 2" x 3" 3" x 4" 4" x 6" Actual Oriﬁce diameter d0 [mm] 23 29 37 46 60 92 Actual Oriﬁce area A0 [mm2] 416 661 1075 1662 2827 6648

Valve size 1" x 2" 1½" x 2" 1½" x 2½" 2" x 3" 3" x 4" 4" x 6" Actual Oriﬁce diameter d0 [inch] 0.91 1.14 1.46 1.81 2.36 3,62 Actual Oriﬁce area A0 [inch2] 0.644 1.024 1.667 2.576 4.383 10,304

Valve size 1" x 2" 1½" x 2" 1½" x 2½" 2" x 3" 3" x 4" 4" x 6" Actual Oriﬁce diameter d0 [mm] 23 29 37 46 60 92 Actual Oriﬁce area A0 [mm2] 416 661 1075 1662 2827 6648 Body material: 1.0619 (WCB) ANSI Flange Inlet CL150 or CL300 Class1) Outlet CL150 Minimum set pressure p [barg] S/G/L 0.1 0.1 0.1 0.1 0.1 0.1

Valve size 1" x 2" 1½" x 2" 1½" x 2½" 2" x 3" 3" x 4" 4" x 6" Actual Oriﬁce diameter d0 [inch] 0.91 1.14 1.46 1.81 2.36 3.62 Actual Oriﬁce area A0 [inch2] 0.644 1.024 1.667 2.576 4.383 10.304 Body material: 1.0619 (WCB) ANSI Flange Inlet CL150 or CL300 Class1) Outlet CL150 Minimum set pressure p [psig] S/G/L 1.5 1.5 1.5 1.5 1.5 1.5

Type 441, 442 Full nozzle ANSI Valve size 1" x 2" 1½" x 2" 1½" x 2½" 2" x 3" 3" x 4" 4" x 6" Actual Oriﬁce diameter d0 [mm] 23 29 37 46 60 92 2 Actual Oriﬁce area A0 [mm ] 416 661 1075 1662 2827 6648 Body material: 1.0619 (WCB), 1.4408 (CF8M) PN 25 H47 H47 DIN EN 1092 Please use 441, 442 Full nozzle DIN PN 40 H47 H47 Inlet CL150 H64 H64 H64 H64 H64 [H64] ASME B16.5 CL300 * * * * * * PN 10 H51 H51 DIN EN 1092 Please use 441, 442 Full nozzle DIN PN 16 H51 H51 Outlet CL150 * * * * * * ASME B16.5 CL300 – – – – – –

1) LESER manufactures the groove at ﬂanged valves by milling. If a customer demands a turned surface in the soil of the groove according to DIN EN 1092-1 an additional option code is necessary: “S01: soil of the groove drilled”. 2) Smooth ﬁnish is not deﬁned in the effective standards.

DNI 20 25 32 40 50 65 80 100 125 150 200 Valve size – 1" x 2" 1½" x 2" 1½" x 2½" 2" x 3" 3" x 4" – 4" x 6" – – – Actual Oriﬁce diameter d0 [mm] 23 29 37 46 60 74 92 98 125 165 Actual Oriﬁce area A0 [mm2] 254 416 661 1075 1662 2827 4301 6648 7543 12272 21382 Europe Coefficient of discharge Kdr Approval No. 072020111Z0008/0/08 Rev.3 PED / DIN EN ISO 4126-1 S/G 0.7 12/2013 L 0.45 Germany Coefficient of discharge w

L 0.521 Canada Coefficient of discharge K Approval No. For current approval no. see www.leser.com CRN S/G 0.699 L 0.521 China Coefficient of discharge w Approval No. For current approval no. see www.leser.com AQSIQ S/G 0.7 L 0.45 Eurasian Custom Union Coefficient of discharge w Approval No. For current approval no. see www.leser.com EAC S/G 0.7 L 0.45 Classification societies Homepage Bureau Veritas BV www.bureauveritas.com DNV GL www.dnvgl.com The valid certification number is changed Lloyd‘ s Register EMEA LREMEA www.lr.org with every renewal.

Registro Italiano Navale RINA www.rina.org For a sample certificate including the valid U.S. Coast Guard U.S.C.G. www.uscg.org certification number see www.leser.com ClassNK NIPPON Kaiji Kyokai (Japan) www.classnk.or.jp

High_Perf_World_format_EN_Print.indd 49 19.07.2016 13:05:43 Serie 441, Serie 441 Full nozzle LESER Original Spare Parts Kits

The LESER Spare Parts Kits contain all the parts recommended for the regular maintenance of a LESER safety valve

Article numbers DN 20 25 32 40 50 65 80 100 125 150 200 Valve size – 1" x 2" 1½" x 2" 1½" x 2½" 2" x 3" 3" x 4" – 4" x 6" – – –

For further spare parts of your individually conﬁgured safety valve, please use the spare part ﬁnder www.leser.com/en/services/spare-part-ﬁnder.html

50 Type 441, 442 XXL Flanged Safety Relief Valves

High_Perf_World_format_EN_Print.indd 52 19.07.2016 13:05:51Type 441, 442 XXL Please notice:Conventional design - Modiﬁcations reserved by LESER. If several materials are speciﬁed LESER deﬁnes the material. - LESER can upgrade materials without notice.Materials - Every part can be replaced by other material acc. to customer specification. 1) Bolted cap H1 only available for DN 200 and DN 250.

High_Perf_World_format_EN_Print.indd 54 19.07.2016 13:05:51Type 441, 442 XXL Please notice:Balanced bellows design - Modiﬁcations reserved by LESER. If several materials are speciﬁed LESER deﬁnes the material. - LESER can upgrade materials without notice.Materials - Every part can be replaced by other material acc. to customer specification. 1) Bolted cap H1 only available for DN 200 and DN 250.

DN I+O 200 x 300 250 x 350 300 x 400 400 x 500 Valve size 8" x 12" 10" x 14" 12" x 16" 16" x 20" Actual Oriﬁce diameter d0 [mm] 165 200 235 295 Actual Oriﬁce area A0 [mm2] 21382 31416 43374 68349 Body material: 1.0460 / 1.0425 (Carbon steel) Bonnet H11) Art. No. 4412. 4752 4762 4772 4782 closed H3 Art. No. 4412. – – – – H61) Art. No. 4412. 4754 4764 4774 4784 open H61) Art. No. 4422. 4755 4765 4775 4785 Body material: 1.4571 (316Ti) Bonnet H11) Art. No. 4414. 4792 4802 4902 4912 closed H61) Art. No. 4414. 4794 4804 4904 4914 1) Bolted cap H1 and bolted lifting device H6 only available for DN 200 and DN 250. DN 300 and DN 400 available with cap H2 and lifting device H4.Type 441, 442 XXL

DN I+O 200 x 300 250 x 350 300 x 400 400 x 500 Valve size 8" x 12" 10" x14" 12" x 16" 16" x 20" Actual Oriﬁce diameter d0 [mm] 165 200 235 295 Actual Oriﬁce area A0 [mm2] 21382 31416 43374 68349

DN I+O 200 x 300 250 x 350 300 x 400 400 x 500 Valve size 8" x 12" 10" x 14" 12" x 16" 16" x 20" Actual Oriﬁce diameter d0 [inch] 6.5 7.87 9.25 11.61 Actual Oriﬁce area A0 [inch2] 33.143 48.695 67.229 105.942 Body material: 1.0460 / 1.0425 (Carbon steel) ANSI Flange Inlet CL150 oder CL300 Class1) Outlet CL150 Minimum set pressure p [psig] S/G/L 2.9 2.9 2.9 2.9

DN I+O 200 x 300 250 x 350 300 x 400 400 x 500 Valve size 8" x 12" 10" x 14" 12" x 16" 16" x 20" Actual Oriﬁce diameter d0 [mm] 165 200 235 295 Actual Oriﬁce area A0 [mm2] 21382 31416 43374 68349 Body material: 1.0460 / 1.0425 (Carbon steel), 1.4571 (316Ti) PN 10 H44 H44 H44 H44 PN 16 H45 H45 DIN EN 1092 * * PN 25 H46 H46 Inlet * * PN 40 – – – – CL150 H64 H64 H64 H64 ASME B16.5 CL300 H65 – – – PN 10 * * * * PN 16 H51 H51 H51 H51 DIN EN 1092 PN 25 – – – – Outlet PN 40 – – – – CL150 H79 H79 H79 H79 ASME B16.5 CL300 – – – –

XXL Linde-V-Nut, Form V48 Linde Standard 420-08 J07 J08 Groove: Rz 16 Linde-V-Nut, Form V48A LDeS 3313.36 J05 J06 Groove: Rz 4, e.g. with hydrogen Lens seal form L DIN 2696 J11 J12 (without sealing lens) LDeS 3313.35 Acc. to DIN EN 1092 Inlet Outlet Remark Flange facing Rz-data according to PN 10 – PN 40 PN 10 – PN 40 (see also LDeS 3313.40) DIN EN 1092 in μm Type B1 Facing: Rz = 12.5 – 50 Raised face * * Type B2 L36 L38 Facing: Rz = 3.2 – 12.5 Steel flanges only Tongue face C1) H94 H92 Groove face D1) H93 H91 Male face E H96 H98 Female face F H97 H99 O-ring male face G J01 J02 O-ring female face H J03 J04 Acc. to ASME B16.5 Smooth finish2) Serrated finish RTJ-Groove Inlet Outlet Inlet Outlet Inlet Outlet Body material Inlet Outlet RTJ- Option RTJ- Option Option code Option code Class code Class code 1.0619, 1.4408 all all L52 L53 CL150 H62 CL150 H63 * * 1) LESER manufactures the groove at ﬂanged valves by milling. If a customer demands a turned surface in the soil of the groove according to DIN EN 1092-1 an additional option code is necessary: “S01: soil of the groove drilled”. 2) Smooth ﬁnish is not deﬁned in the effective standards.

DN I+O 200 x 300 250 x 350 300 x 400 400 x 500 Valve size 8" x 12" 10" x 14" 12" x 16" 16" x 20" Actual Oriﬁce diameter d0 [mm] 1665 200 235 295 Actual Oriﬁce area A0 [mm2] 21382 31416 43374 68349 Europe Coefficient of discharge Kdr Approval No. 072020111Z0008/0/08 Rev.3 PED / DIN EN ISO 4126-1 S/G 0.75 0.7 0.7 0.7 12/2013 L 0.56 0.52 0.52 0.52 Germany Coefficient of discharge w

PED / Approval No. TÜV SV 576 AD 2000-Merkblatt A2 S/G 0.75 0.7 0.7 0.7 07/2012 L 0.56 0.52 0.52 0.52 United States Coefficient of discharge K Approval No. M37044 S/G 0.699 ASME Sec. VIII Div. 1 Approval No. M37055 L 0.521 Canada Coefficient of discharge K Approval No. For current approval no. see www.leser.com CRN S/G 0.699 L 0.521 China Coefficient of discharge wType 441, 442

AQSIQ S/G 0.75 0.7 0.7 0.7 L 0.56 0.52 0.52 0.52 Eurasian Custom Union Coefficient of discharge w Approval No. For current approval no. see www.leser.com EAC S/G 0.75 0.7 0.7 0.7 L 0.56 0.52 0.52 0.52 Classification societies Homepage Bureau Veritas BV www.bureauveritas.com The valid certification number is changed DNV GL www.dnvgl.com with every renewal.

Lloyd‘ s Register EMEA LREMEA www.lr.org For a sample certificate including the valid Registro Italiano Navale RINA www.rina.org certification number see www.leser.com

High_Perf_World_format_EN_Print.indd 63 19.07.2016 13:05:55 Type 444 DIN Type 444 ANSI Flanged Safety Relief Valves

– Modifications reserved by LESER. – LESER can upgrade materials without notice. – Every part can be replaced by other material acc. to customer specification.

Type 444 ANSI Valve size 1" x 2" 1½" x 3" 2" x 3" 2½" x 4" 3" x 4" 3" x 4" Actual Oriﬁce diameter d0 [mm] 23 37 46 60 74 74 Actual Oriﬁce area A0 [mm2] 416 1075 1662 2827 4301 4301 Set pressure range S/G/L [barg] 0.1 – 6.8 6.81

leser safety valve catalogue free sample

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