LESER - Compact Performance Safety Valve
LESER - Compact Performance Safety Valve
Model: 437 / 438 / 439 / 459 / 462 / 462 HDD (Heavy Duty Design)
Body Material: WCB / F316L
End Connection: Screwed End / SORF Flanged End

NOTE : For different valve specifications, please click 'INQUIRY ME' button located below.

LESER Compact Performance Safety Valves • Are designed to meet all industrial applications up to F orifice • Open rapidly with an overpressure of max. 5 % (Series 459) resp. 10 % (Series 437) to the full design lift • Have a maximum blowdown of minus 10 % for steam/gas service and minus 20 % for liquid service • 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 worldwide which ensures the worldwide applicability.

 

ADVANTAGES

  • Compact design with high capacity relative to valve size
  • Large selection of possible connections and seals for different operating conditions
  • Quick delivery (2 - 4 weeks from the factory or next day from local warehouse)
  • Space-saving horizontal installation possible
  • Single Trim (identical internal parts for steam/gas/liquids) allows economical maintenance
  • Longer lifespan of optional bellows through integrated shielding

TECHNICAL SPECIFICATIONS

Nominal Diameter at Inlet DN 15 - DN 40 | 3/8" - 1 1/2"
Orifice D - F
Actual Orifice Diameter d0 6 mm - 17,5 mm | 0,236 in - 0,689 in
Actual Orifice Area A0 28,3 mm² - 241 mm² | 0,044 in² - 0,374 in²
Pressure 0,1 bar - 850 bar | 1,5 psig - 12.328 psig
Temperature (iaw DIN EN) -270°C to +450°C | -454°F to +842°F
Material Outlet 1.4104, 1.4404, 0.7043, 1.0619, 1.4408 | SA 479 430, SA 479 316L, Ductile Gr. 60-40-18, SA 216 WCB, SA 351 CF8M
Valve Connection Threads iaw DIN ISO 228-1, DIN ISO 7-1 / BS 21, ANSI / ASME B1.20.1. Flange iaw DIN EN 1092-1 / DIN 2501., ASME B16.5
Bellows Material (optional) Stainless steel, Elastomer (EPDM), Hastelloy
Load Type Spring loaded

APPROVALS

INDUSTRIES

  • Chemical Industry
  • Petrochemical Industry
  • Technical Gases
  • Oil and Gas Industry
  • Power
  • Food and Beverage Industry
  • Pharmaceutical Industry

 

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