HIGH EFFICIENCY

TYPE 821

Industries

Approvals

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

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