LESER Compact Performance Safety Valve Type439

Compact PerformanceType 439

Safety valve with vulcanized soft seal for increased tightness at low set pressures. Technical data

  • Matching selection of threaded and flanged connections with a delivery time of 2 weeks
  • CE_Europa_schwarz
  • VdTUEV
  • ASME_UV_USA_schwarz
  • EAC_Russland_schwarz
  • TS_Logo_China_schwarz
  • UKCA_Grossbritanien_schwarz
  • CRN_Kanada_schwarz
  • Bureau-Veritas
  • DNV
  • RINA-1861
  • Vogel
  • LloydsRegister
  • CCS_Logo_China_SW
  • Korean-Register
  • Class-NK

Applications & Industries

  • Chemistry
  • Oil & Gas
  • Petrochemical
  • Energy
  • Technical gases
  • LNG & LPG
  • Pharma
  • Food and beverages
  • Shipbuilding
  • Other industries

The optimal solution for:

  • Compressors and pumps
  • Technical gases and CO2 plants
  • Pressure vessels and piping systems carrying vapors, gases and fluids
  • Thermal expansion

BASF_inv Saipem Spa_inv Aerzener Maschinenfabrik_inv

Technical Features Type 439

Set pressure(according to ASME) 0.1 - 16 bar | 1.5 - 232 psig
Set pressure(according to CE) 0.1 - 16 bar | 1.5 - 232 psig
Temperature(according to ASME) -45 to 150 °C | -49 to 302 °F
Temperature(according to CE) -45 to 150 °C | -49 to 302 °F
Capacity C-
Connections DIN EN 1092 G/R: NPS 3/8 to NPS 1 | DN 15 - DN 25
Connections ASME B16.5 NPT: NPS 1/2 to NPS 1 | NPS 1/2 to NPS 1
Flange class Inlet DIN EN 1092 PN 40 - PN 400
Flange class Inlet ASME B16.5 Class 150 - Class 2500
Body material 1.4104, 1.4404 | SA 479 430, SA 479 316L
Narrowest flow diameter d₀10 mm | 0.394 in
Narrowest flow area A₀ 78.5 mm² | 0.122 in²
Seat gasket Vulcanized soft seal


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