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Leser - Model Type 821 -High Efficiency - Pilot-Operated Safety Valves
The pilot-operated pressure relief valve Type 821 Modulate Action opens modulating. Pilot-operated pressure relief valve according to API 526 - Modular Action.
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The optimal solution for:
- the protection of vapors, gases and fluids
- operation up to 91% of set pressure
- Back pressure up to 70% of the set pressure
- Pressure setting(according to the EC): 1 - 426 bar | 15 - 6,179 psig
- Pressure setting(according to ASME): 1 - 689 bar | 15 - 10,000 psig
- Temperature(according to the EC): -45 to 200 °C (individual case: -162 to 300 °C)
- Temperature(according to ASME): -49 to 392 °F (individual case: -259.6 to 572 °F)
- Capability: orifice D - T+
- DIN EN 1092 connections: DN 25 - DN 200
- ASME B16.5 connections: NPS 1 to NPS 8
- Inlet Flange Class DIN EN 1092: PN 10 - PN 400
- Inlet Flange Class ASME B16.5: Class 150 - Class 2500
- Material body: 1.0619, 1.4408, 1.7357 | SA 216 WCB, SA 351 CF8M, SA 217 WC6, SA 352 LCB, SA 351 CF3M, SA 995 Gr 4A CD3MN (Duplex), SA 494 M35-1 (Monel), SA 494 CX2MW (Hastelloy)
- Narrowest passage diameter d0: 11 - 180 mm | 0.433 - 7.087 in.
- Narrowest Passage Area A0: 95 - 25,446.9 mm² | 0.147 - 39.443 in²
- Gasket seat: Soft lacquer, Metallic, Lacquer plate