HIGH EFFICIENCY
TYPE 811
Industries
Approvals
LESER High Efficiency pressure relief valves are designed, marked, produced and approved according to the requirements of the following regulations:
UV
Technical Specifications for Type 811
Nominal Diameter at Inlet
DN 25 - DN 200 | 1" - 8"
Orifice
API Standard as well as Extra Orifice: 1 D 2 - 8 T 10 / 1 G 2 - 8 T+ 10
Actual Orifice Diameter dâ‚€
11 - 190 mm | 0.433 - 7.087 in
Actual Orifice Area Aâ‚€
95 - 25446.9 mm² | 0.147 - 39.443 in²
Pressure
2.5 - 256 bar | 36 - 3705 psig
Flange Rating Inlet
PN 10 - PN 250 | CL150 - CL1500
Temperature (in accordance with DIN EN)
-45 to 200 °C (Special: -162 to 300 °C) | -49 to 392 °F (Special: -259.6 to 572 °F)
Temperature (in accordance with DIN EN)
45 to 200 °C (Special: -162 to 300 °C) | -49 to 392 °F (Special: -259.6 to 572 °F)
Body Material
1.0619, 1.4408 (Special: High Alloy) | SA 216 WCB, SA 351 CF8M, SA 352 LCB (Special: High Alloy)
Valve Connection
Flange acc. to DIN EN 1092 or acc. to ASME B 16.5 or acc. to JIS 2220
Load Type
Medium controlled
Approvals
ASME Section XIII certified for Section VIII Div. 1 service, PED/ DIN EN ISO 4126-4, PED/ AD 2000-Merkblatt A2, AQSIQ, EAC, TSSA
Classification societies
LR, RINA, DNV GL, BV
Specials
Pilot action type: Pop Action | Open: 1% opening pressure tolerance | Closed: 3 - 7% (adjustable also beyond API standard from 3 up to 15%) closing pressure tolerance | Application: Gas
Downloads
Access all the necessary documents and detailed information for pressure relief valves in our download area
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