LESER - High Efficiency Pilot Operated Safety Valve
LESER - High Efficiency Pilot Operated Safety Valve
Model: 810 (Pop Action) / 820 (Modulate Action)
Body Material: WCB / LCB / CF8M
End Connection: RF Flanged End

NOTE : For different valve specifications, please click 'INQUIRY ME' button located below.

LESER Pilot Operated Safety Valve (POSV) LESER Pilot Operated Safety Valves (POSVs) are designed according to the API 526 standard. The full range of sizes from 1" x 2" up to 8" x 10" (DN 25 – DN 200) with all orifices from D – T is available for pressure ratings up to pressure class 2500 x 6001). Beyond API 526, LESER offers so-called Extra Orifices (also known as Full Port or Full Bore nozzles).

The Extra Orifices provide maximum capacity in relation to valve size. In addition, LESER POSVs come in two different functional designs, i.e. Pop Action (Series 810) and Modulate Action (Series 820). These designs determine the POSVs operating characteristics. Depending on their design, LESER POSVs open rapidly (Series 810 – Pop Action) or gradually in proportion to system pressure (Series 820 – Modulate Action).

 

ADVANTAGES

  • Pilot Operated Safety Valve:
  • Piping between the pilot and main valves is integrated into the cover to prevent damage and freezing
  • Integrated Backflow Preventer as standard part
  • Four week delivery time from the factory
  • Higher capacity than comparable size with extra orifices
  • 20% less installation space than competitors' comparable models
  • Supplementary Loading System:
  • Higher operating pressures are possible
  • Closing pressure difference of up to -3 %; opening process is independent of back pressure
  • Functional test and valve adjustment possible during operation
  • Max. 0.1 sec. for valve to open completely

TECHNICAL SPECIFICATIONS

Nominal Diameter at Inlet DN 25 - DN 200 | 1" - 8"
Orifice 1 D 2 to 8 T+ 10 | 1 D 2 to 8 T+ 10
Actual Orifice Diameter d0 11 mm - 180 mm | 0.433 in - 7.087 in
Actual Orifice Area A0 95 mm² - 25,446.9 mm² | 0,147 in² - 39.443 in²
Pressure 2,5 bar - 426 bar | 36 psig - 6170 psig
Temperature (iaw DIN EN) -45 °C to 200 °C | -49°F to 392°F
Body Material 1.0619, 1.4408 | SA 352 LCB, SA 216 WCB, SA 351 CF8M
Valve Connection Flange in accordance with DIN EN 1092, ASME B 16.5 or JIS 2220
Load Type Medium Controlled

 

APPROVALS

INDUSTRIES

  • Oil and Gas Industry
  • Chemical Industry
  • Petrochemical Industry
  • Power
  • Technical Gases
  •  
 

 

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