COMPACT
PERFORMANCE
Pressure relief valves with compact dimensions and high connection variety
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Flanged and threaded valves with a various options
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Small installation space with simultaneous horizontal installation optio
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Available as a bellows version
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Set pressures up to 850 barg / 12325 psig
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LESER Nanotightness: Exceeds the tightness requirements of API 527 by 50%
Standard delivery time for all options 14 days ex works.
More complex options have longer delivery times.
Industries
Approvals
LESER Compact Performance pressure relief valves are designed, marked, produced and approved according to the requirements of the following regulations:
UV
Valve Types
Type 437 >
Metal to metal or sealing plate
G 3/8 - 1 (NPT 1/2" - 1")
Type 459 >
Metal to metal or sealing plate
1/2" - 1 1/2" (1/2" - 1 1/2")
Type 438 >
O-ring disc
G 3/8 - 1 (NPT 1/2" - 1")
Type 459 HDD >
Metal to metal or sealing plate, massive construction for high pressure
1/2" - 1“ (1/2" - 1“ )
Type 439 >
Vulcanized soft seal disc
G 3/8 - 1 (NPT 1/2" - 1")
Type 462 >
O-ring disc
1/2" - 1 1/2" (1/2" - 1 1/2")
Type 462 HDD >
O-ring disc, massive construction for high pressure
1/2" - 1“ (1/2" - 1“ )
Technical Specifications for Compact Performance
Nominal Diameter at Inlet
DN 15 - DN 40 | 3/8" - 1 1/2"
Actual Orifice Diameter dâ‚€
6 mm - 17.5 mm | 0.236 in - 0.689 in
Actual Orifice Area Aâ‚€
28.3 mm² - 241 mm² | 0.044 in² - 0.374 in²
Pressure
0.1 bar - 850 bar | 1.5 psig - 12.328 psig
Temperature (in accordance with DIN EN)
-270°C to +450°C | -454°F to +842°F
Body Material
1.4104, 1.4404, 0.7043, 1.0619, 1.4408 | SA 479 430, SA 479 316L, Ductile Gr. 60-40-18, SA 216 WCB, SA 351 CF8M
Valve Connection
Threads iaw DIN ISO 228-1, DIN ISO 7-1 / BS 21, ANSI / ASME B1.20.1. / Flange iaw DIN EN 1092-1 / DIN 2501., ASME B16.5
Bellows Material (optional)
Stainless steel, Elastomer (EPDM), Hastelloy, Inconel
Load Type
Spring-loaded
Downloads
Access all the necessary documents and detailed information for pressure relief valves in our download area.
CONTACT LESER UK
For ALL LESER Safety Valve enquiries In the United Kingdom - Contact LESER UK​
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Speak to one of the LESER UK sales engineers today: +44 (0)117 930 6113
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