HIGH PERFORMANCE
Pressure relief valves for all industrial applications
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High capacities in comparison to nominal size
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Wide range of nominal sizes
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Wide range of options available
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Excellent price-performance ratio
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LESER Nanotightness: Exceeds the tightness requirements of API 527 by 50%
Industries
Approvals
LESER High Performance pressure relief valves are designed, marked, produced and approved according to the requirements of the following regulations:
UV
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 dâ‚€
18 mm - 295 mm | 0.71 in - 11.61 in
Actual Orifice Area Aâ‚€
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
Downloads
Access all the necessary documents and detailed information for pressure relief valves in our download area.
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