Compact Performance

Safety valves with compact dimension and variable connections

  • Flanged and threaded valves with a flexible range of options to suit your application
  • Bellows version available
  • Set pressures up to 1.000 bar / 14,504 psig
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Compact Performance safety valve from LESER

Technical data Compact Performance Safety valves

Threaded connections
G/R: NPS 3/8 to NPS 1 1/2
NPT: NPS 1/2 to NPS 2
Flange connections DIN EN 1092
DN 15 to DN 25
Flange connections ASME B16.5
NPS 1/2 to NPS 1
Set pressure
0.1 bar - 850 bar | 1.5 - 12,328 psig
Temperature
-273 °C - 450 °C | -459 °F - 842 °F
Capacity
Orifice B+ to F

Body material
Stainless steel, Carbon steel, Stainless steel casting
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Valve Types

Choose the product type that suits you

Compact Performance - Safety valves for small capacities
LESER Compact Performance Safety Valve Type 437
Type 437

Safety valves for securing small capacities

G 3/8 - 1 | NPT 1/2 - NPT 1

0.1 - 365 bar | 1.5 - 5,294 psig

LESER Compact Performance Safety Valve Type 438
Type 438

Safety valve with O-ring seal Plug for improved tightness

G 3/8 - 1 | NPS 1/2 - NPS 1

5 - 180 bar | 72.5 - 2,610 psig

LESER Compact Performance Safety Valve Type439
Type 439

Safety valve with vulcanized soft seal for increased tightness at low response pressures.

G 3/8 - 1 | NPT 1/2 - NPT 1

0.1 - 16 bar | 1.5 - 232 psig

Compact Performance - Safety valves for medium capacities
LESER Compact Performance Safety Valve Type 459
Type 459

Safety valve for medium power protection

NPS 1/2 to NPS 1 1/2 | NPS 1/2 to NPS 1 1/2

0.2 - 250 bar | 2.9 - 3,626 psig

LESER Compact Performance Safety Valve Type 459 HDD
Type 459 HDD

Safety valve for safeguarding medium capacities and high pressures

NPT 1/2 to NPT 1 | NPS 1/2 to NPS 1

250.01 - 850 bar | 3626 - 12,328 psig

LESER Compact Performance Safety Valve Type 462
Type 462

Safety valve with O-ring disc for increased tightness

NPT 1/2 to NPT 2 | NPS 1/2 to NPS 1

0.5 - 250 bar | 7.3 - 3,626 psig

LESER Compact Performance Safety Valve Type 462 HDD
Type 462 HDD

Safety valves with O-ring disc for increased tightness at high set pressures

NPT 1/2 to NPT 1 | NPS 1/2 to NPS 1

250.01 - 350 bar | 3626 - 5,076 psig

Compact Performance - Safety valves for medium capacities
LESER Compact Performance Safety Valve Type 459
Type 459

Safety valve for medium power protection

NPS 1/2 to NPS 1 1/2 | NPS 1/2 to NPS 1 1/2

0.2 - 250 bar | 2.9 - 3,626 psig

LESER Compact Performance Safety Valve Type 459 HDD
Type 459 HDD

Safety valve for safeguarding medium capacities and high pressures

NPT 1/2 to NPT 1 | NPS 1/2 to NPS 1

250.01 - 850 bar | 3626 - 12,328 psig

LESER Compact Performance Safety Valve Type 462
Type 462

Safety valve with O-ring disc for increased tightness

NPT 1/2 to NPT 2 | NPS 1/2 to NPS 1

0.5 - 250 bar | 7.3 - 3,626 psig

LESER Compact Performance Safety Valve Type 462 HDD
Type 462 HDD

Safety valves with O-ring disc for increased tightness at high set pressures

NPT 1/2 to NPT 1 | NPS 1/2 to NPS 1

250.01 - 350 bar | 3626 - 5,076 psig

Download Catalogues

Compact Performance Catalog

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Sizing and selection

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