LESER High Performance Safety Valve Type 457 458

High Performance

Type 457, 458

Safety valve for high pressures with full nozzle

Approvals

LESER High Performance safety valves of Type 457, 458 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 457, 458

Nominal Diameter at Inlet
DN 25 - DN 150 | 1" - 6"
Actual Orifice Diameter d₀
15 - 110 mm | 0.59 - 4.33 in
Actual Orifice Area A₀
177 - 9503 mm² | 0.274 - 14.730 in²
Pressure
2.5 - 300 bar | 36 - 4350 psig
Flange Rating Inlet
CL150 - CL1500 | CL150 - CL1500
Temperature (in accordance with DIN EN)
-85 to 550 °C | -121 to 1022 °F
Temperatur (nach ASME)
-29 to 538 °C | -20 to 1000 °F
Body Material
1.0619, 1.4581, 1.7357 | SA 216 WCB, SA 351 CF10M, SA 217 WC6
Valve Connection
Flange acc. to DIN EN 1092-1 or acc. to ASME B 16.5 or acc. to JIS 2220
Bellows Material (optional)
Stainless steel
Load Type
Spring loaded
Approvals
PED/DIN EN ISO 4126-1, PED/AD 2000-Merkblatt A2, ASME Sec. VIII Div. 1, CRN, AQSIQ, EAC
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