COMPACT PERFORMANCE
TYPE 437
Industries
Approvals
Type 437 LESER Compact Performance pressure relief valves are designed, marked, produced and approved according to the requirements of the following regulations:
UV
Technical Specifications for 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 dâ‚€
6 - 10 mm | 0.236 - 0.394 in
Actual Orifice Area Aâ‚€
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)
PN 40 - PN 400 | CL150 - CL2500
Temperature (in accordance with DIN EN)
-270 to 280 °C | -454 to 536 °F
Temperature (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 Section XIII certified for Section VIII Div. 1 service, CRN, AQSIQ, EAC
Classification societies
LR, RINA, DNV GL, BV
Downloads
Access all the necessary documents and detailed information for pressure relief valves in our download area.
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