LESER Compact Performance Safety Valve Type 437
LESER Compact Performance Safety Valve Type 437
LESER Compact Performance Safety Valve Type 437

Compact Performance

Type 437

Safety valve with metal to metal sealing or sealing plate

Approvals

LESER Compact Performance safety valves of Type 437 are designed, marked, produced and approved according to the requirements of the following regulations:

  • LESER CE Approvel
  • LESER ASME Approvel
  • LESER EAC Approvel
  • LESER Chinese TS Approvel

Technical specifications Type 437

Nominal Diameter Inlet - Thread
G 3/8 - 1 | NPT 1/2" - 1"
Nominal Diameter Inlet - Flange
DN 15 - DN 25 | 1/2" - 1"
Actual Orifice Diameter d₀
6 - 10 mm | 0.236 - 0.394 in
Actual Orifice Area A₀
28.3 - 78.5 mm² | 0.044 - 0.122 in²
Pressure
0.1 - 365 bar | 1.5 - 5294 psig
Flange Rating Inlet
PN 40 - PN 400 | CL150 - CL2500
Temperature (in accordance with DIN EN)
-270 to 280 °C | -454 to 536 °F
Temperatur (nach ASME)
-268 to 280 °C | -450 to 536 °F
Material Outlet Body
1.4104, 1.4404 | SA 479 430, SA 479 316L
Material inlet body
1.4104, 1.4404, 1.4404 stellitiert | SA 479 430, SA 479 316L, SA 479 316L stellitiert
Valve Connection
Thread acc. to DIN ISO 228-1, DIN ISO 7-1 / BS 21 or ASME B1.20.1, Flange acc. to DIN EN 1092-1 or ASME B16.5
Bellows Material (optional)
No bellows
Load Type
Spring loaded
Approvals
PED/ DIN EN ISO 4126-1, AD 2000-Merkblatt A2, ASME Sec. VIII Div. 1, CRN, AQSIQ, EAC
Classification societies
LR, RINA, DNV GL, BV
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Compact Performance Catalogue

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