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Product page - High performance pressure relief valves

HIGH PERFORMANCE

Pressure relief valves for all industrial applications

  • High capacities in comparison to nominal size

  • Wide range of nominal sizes

  • Wide range of options available

  • Excellent price-performance ratio

  • LESER Nanotightness: Exceeds the tightness requirements of API 527 by 50%

LESER High Performance pressure relief valves

Industries

Approvals

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

ce-mark logo

UV

asme-uv logo
EAC Logo

Valve Types

Type 441, 442 DIN > 
DIN Flange

DN 20 - DN 200 (3/4" - 8")

Type 444 DIN >
Deep-drawn body

DN 25 - DN 80 (1" - 3")

Type 441, 442 Full nozzle ANSI >
Nozzle

DN 25 - DN 100 (1" - 4") 

Type 441, 442 ANSI >
ANSI Flange

DN 25 - DN 100 (1" - 4")

Type 441, 442 XXL >
High nominal diameter

DN 250 - DN 400 (10" -16")

Type 444 ANSI >
Deep-drawn body

DN 25 - DN 80 (1" - 3")

Type 441, 442 Full nozzle DIN >
Nozzle

DN 25 - DN 50 (1" - 2") 

Type 455, 456 >
High pressure with seat

DN 25 - DN 100 (1" - 4") 

Type 457, 458 >
High pressure with seat

DN 25 - DN 150 (1" - 6") 

Technical Specifications for High Performance

Nominal Diameter at Inlet

DN 20 - DN 400 | 3/4" - 16"

Actual Orifice Diameter d₀

18 mm - 295 mm | 0.71 in - 11.61 in

Actual Orifice Area A₀

254 mm² - 68349 mm² | 0.394 in² - 105.942 in²

Pressure

0.1 bar - 300 bar | 1.5 psig - 4,350 psig

Temperature (in accordance with DIN EN)

-270 °C to 550 °C | -454 °F to 1,022 °F

Body Material

0.6025, 0.7043, 1.0619, 1.4408, 1.0460 / 1.0425, 1.4571, 1.4404, 1.4581, 1.7357 | Cast iron, Ductile Gr. 60-40-18, SA 216 WCB, SA 351 CF8M, carbon steel, 316Ti, SA 479 316L, SA 351 CF10M , SA 217 WC6

Valve Connection

Flange in accordance with DIN EN 1092 or ASME B 16.5

Bellows Material (optional)

Stainless steel, elastomer

Load Type

Spring-loaded

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LESER High performance catalogue

Downloads

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

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CONTACT LESER UK

For ALL LESER Safety Valve enquiries In the United Kingdom - Contact LESER UK​

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