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Product page - Type 821 High Efficiency pressure relief valve - leser uk

HIGH EFFICIENCY

TYPE 821

Type 821 LESER pilot operated pressure relief valve
Type 821 LESER pilot operated pressure relief valve

Industries

Approvals

Type 821 High Efficiency pressure relief valves are designed, marked, produced and approved according to the requirements of the following regulations:

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asme-uv logo

UV

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Technical Specifications for Type 821

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 - 180 mm | 0.433 - 7.087 in

Actual Orifice Area A₀

95 - 25446.9 mm² | 0.147 - 39.443 in²

Pressure

2.5 - 426 bar | 36 - 6170 psig

Flange Rating Inlet

PN 10 - PN 400 | CL150 - CL2500

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)

Temperatur (nach ASME)

-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

Controlled by process medium

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: Modulate Action | Open: max. 10% opening pressure tolerance | Closed: max. 7% closing pressure tolerance | Application: Steam, gasses and liquids

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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 High Efficiency product catalogue
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