LESER Modulate Action Safety Valve Type 431 433

Modulate ActionType 431, 433

Standard Safety valves with rolled-in seat, DIN and ASME flange connections. Technical data

  • Delivery times: 2 weeks for standard configurations
  • Gray cast iron, nodular cast iron, carbon steel and stainless steel castings
  • CE_Europa_schwarz
  • VdTUEV
  • ASME_UV_USA_schwarz
  • CRN_Kanada_schwarz
  • EAC_Russland_schwarz
  • TS_Logo_China_schwarz
  • UKCA_Grossbritanien_schwarz
  • Bureau-Veritas
  • DNV
  • RINA-1861
  • Vogel
  • LloydsRegister
  • CCS_Logo_China_SW
  • Korean-Register
  • Class-NK

Applications & Industries

All industries up to 40 barg

The optimal solution for:

  • Thermal expansion
  • Pump fuses
  • Variable mass flow with O-ring damper
  • Back pressures up to PN 40
BASF_inv PIA NOVARTIS

Technical Features Type 431, 433

Set pressure (according to CE) 0.2 - 40 bar | 2.9 - 580.15 psig
Temperature (according to CE) -270 to 450 °C | -454 to 842 °F
Capacity orifice C- to N-
Connections DIN EN 1092 DN 15 - DN 150
Connections ASME B16.5 NPS 1/2 - NPS 6
Flange class Inlet DIN EN 1092 PN 16 - PN 40
Flange class Inlet ASME B16.5 Class 150 - Class 300
Body material 0.6025, 0.7043, 1.0619, 1.4408 | Gr. 60-40-18, SA 216 WCB, SA 351 CF8M
Narrowest flow diameter d₀ 12 - 92 mm | 0.47 - 3.62 in
Narrowest flow area A₀ 113 - 6648 mm² | 0.175 - 10.3 in²
Bellows material (optional) Stainless steel and elastomer
Seat gasket Metallic, Sealing plate , soft sealing
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Modulate Action Catalog

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Sizing and selection

Sizing and selection of your LESER Safety valve with VALVESTAR® - The Sizing Program

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