High Performance
High Performance Safety Valve from LESER

Safety 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%

Approvals

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

  • LESER CE Approvel
  • LESER ASME Approvel
  • LESER EAC Approvel
  • LESER Chinese TS Approvel

Valve Types

Type 441, 442 DIN

DIN Flange

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

Type 441, 442 ANSI

ANSI Flange

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

Type 441, 442 XXL

High nominal diameter

DN 200 - DN 400 (8" -16")

Type 444 DIN

Deep-drawn body

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

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 441, 442 Full nozzle ANSI

Nozzle

DN 25 - DN 100 (1" - 4") 

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

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
Valvestar from LESER
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Sizing of your safety valve.

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