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Product page - Type 811 High Efficiency

HIGH EFFICIENCY

TYPE 811

LESER Type 811 Pilot operated pressure relief valve
LESER Type 811 Pilot operated pressure relief valve

Industries

Approvals

LESER High Efficiency pressure relief valves are designed, marked, produced and approved according to the requirements of the following regulations:

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UV

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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 d₀

11 - 190 mm | 0.433 - 7.087 in

Actual Orifice Area A₀

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

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Downloads

Access all the necessary documents and detailed information for pressure relief valves in our download area

View or download the LESER High Efficiency catalogue
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