Pilot Operated Pressure Relief Valves

Pilot-operated Pressure-relief Valves are composed of Pilot Assy and Main Valve. Although Spring-loaded Pressure-relief valves adopts the force of the spring against the inlet pressure, the reliving pressure and reseating pressure of the Pilot-operated Pressure-relief Valves is controlled by Pilot Assy, which acts nearly as same as Spring-loaded Pressure-relief valves. There is no adjusting function in the Main Valve.
Pilot-operated Pressure-relief Valves have larger size variations compared to Spring-loaded type, which is applied in a severe condition such as high pressure.

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
Overpressure tolerance at a minimum of 1% with Pop Action

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