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Leser - Model Type 811 -High Efficiency - Pilot-Operated Safety Valves
Pilot-operated pressure relief valves type 811 - Pop Action - open abruptly. pilot-operated safety valve in accordance with API 526 - Pop Action.
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The optimal solution for:
- gas protection
- operation up to 96% from set pressure
- Back-pressure up to 70% from set pressure
- Setting pressure(according to CE): 2.5 - 256 bar | 36 - 3,705 psig
- Setting pressure(according to ASME): 2.5 - 256 bar | 36 - 3,705 psig
- Temperature(according to CE): -45 to 200 °C (individual housing: -162 to 300 °C)
- Temperature(according to ASME): -49 to 392 °F (individual case: -259.6 to 572 °F).
- Dripping: orifice D - T+
- Connections DIN EN 1092: DN 25 - DN 200
- ASME B16.5 connections: NPS 1 to NPS 8
- Flange class Inlet DIN EN 1092: PN 10 - PN 250
- Flange Class Inlet ASME B16.5: Class 150 - Class 1500
- Body material: 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)
- The narrowest flow diameter d0: 11 - 180 mm | 0.433 - 7.087 inches
- The narrowest flow area A0: 95 - 25 446.9 mm² | 95 - 25 446.9 mm²
- Seat gasket: Soft sealing , metallic, sealing plate