Pilot Operated Check Valves

Pilot operated check valves (PO Check Valves) are typically used to hold pressure in a cylinder in the event of a drop in pressure or a total loss of pressure. The pneumatic check valve locks air in the device until the pilot signal is energized, at which time the valve opens and air evacuates the cylinder. NGT pilot operated check valves are available in a variety of body configurations, with port sizes ranging from 1/8” to ¾” NPTF. BSPP ports are also available.

The NGT Advantage:

  • Balanced poppet design reduces the load on the main poppet seal by pulling the poppet away from the face seal as the pressure increases. This reduces the wear on the poppet seal and allows the pneumatic check valve to operate at higher pressures
  • Valves ship with lubricated seals
  • Hardcoat anodized aluminum with lubricant coating to reduce wear and increase seal life
  • 100% leak and function tested
  • 100% manufactured in USA
  • Valves are RoHS compliant

Options:

  • Manual release buttons (extended length or flush buttons) to exhaust trapped air in cylinders prior to system maintenance
  • Flow control, which meters air from the output to the input port to avoid crash landings or equipment crashes
  • Available lower pilot pressure options enable trapped air to pilot pressure ratio of 4:1. For example, 80 psi trapped pressure can be released with as low as 20 psi pilot pressure
  • Adjustable spring pressure, enabling the valve to close at a higher pilot pressure or before all the air exhausts, resulting in faster stops
  • Stainless steel is available on certain models

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Part # Image Description Type Port Size In Port Size Out Pilot Port Material 3D Model Flow Capacity Max. Pressure
B81FMAD Picture of 1/2 NPTF Adjustable P.O. Check w/ Flush Manual Release NGT’s B81FMAD is an adjustable PO check valve that enables quicker stops if the valve is closing too slowly or drifting after changing direction on the control valve. The B81FMAD has 1/2 NPTF in/out ports and 1/4 NPTF pilot port, standard temperature seals, and a flush manual release. Adjustable 1/2 NPTF 1/2 NPTF 1/4 NPTF Standard -- 3.8 120
B81FMADV Picture of 1/2 NPTF Adjustable P.O. Check w/ Flush Manual Release and High Temp Seals NGT’s B81FMADV is an adjustable PO check valve that enables quicker stops if the valve is closing too slowly or drifting after changing direction on the control valve. The B81FMADV has 1/2 NPTF in/out ports and 1/4 NPTF pilot port, high temperature seals, and a flush manual release. Adjustable 1/2 NPTF 1/2 NPTF 1/4 NPTF Standard -- 3.8 120
B81FMADT40 Picture of 1/2 NPTF Adjustable P.O. Check w/ Flush Manual Release and Low Temp Seals NGT’s B81FMADT40 is an adjustable PO check valve that enables quicker stops if the valve is closing too slowly or drifting after changing direction on the control valve. The B81FMADT40 has 1/2 NPTF in/out ports and 1/4 NPTF pilot port, low temperature seals, and a flush manual release. Adjustable 1/2 NPTF 1/2 NPTF 1/4 NPTF Standard -- 3.8 120
B810MAD Picture of 1/2 NPTF Adjustable P.O. Check w/ Manual Release NGT’s B810MAD is an adjustable PO check valve that enables quicker stops if the valve is closing too slowly or drifting after changing direction on the control valve. The B810MAD has 1/2 NPTF in/out ports and 1/4 NPTF pilot port, standard temperature seals, and an extended manual release. Adjustable 1/2 NPTF 1/2 NPTF 1/4 NPTF Standard -- 3.8 120
B810MADV Picture of 1/2 NPTF Adjustable P.O. Check w/ Manual Release and High Temp Seals NGT’s B810MADV is an adjustable PO check valve that enables quicker stops if the valve is closing too slowly or drifting after changing direction on the control valve. The B810MADV has 1/2 NPTF in/out ports and 1/4 NPTF pilot port, high temperature seals, and an extended manual release. Adjustable 1/2 NPTF 1/2 NPTF 1/4 NPTF Standard -- 3.8 120
B810MADT40 Picture of 1/2 NPTF Adjustable P.O. Check w/ Manual Release and Low Temp Seals NGT’s B810MADT40 is an adjustable PO check valve that enables quicker stops if the valve is closing too slowly or drifting after changing direction on the control valve. The B810MADT40 has 1/2 NPTF in/out ports and 1/4 NPTF pilot port, low temperature seals, and an extended manual release. Adjustable 1/2 NPTF 1/2 NPTF 1/4 NPTF Standard -- 3.8 120
B81FM Picture of 1/2 NPTF P.O. Check w/ Flush Manual Release NGT’s B81FM is a standard pilot operated check valve that locks pneumatic devices in position. The B81FM has 1/2 NPTF in/out ports and 1/4 NPTF pilot port, standard temperature seals, and a flush manual release. The B81FM also can accommodate as low as 40 psi pilot pressure. Single PO Check 1/2 NPTF 1/2 NPTF 1/4 NPTF Standard 3.8 150
B81FMV Picture of 1/2 NPTF P.O. Check w/ Flush Manual Release and High Temp Seals NGT’s B81FMV is a standard pilot operated check valve that locks pneumatic devices in position. The B81FMV has 1/2 NPTF in/out ports and 1/4 NPTF pilot port, high temperature seals, and a flush manual release. The B81FMV also can accommodate as low as 40 psi pilot pressure. Single PO Check 1/2 NPTF 1/2 NPTF 1/4 NPTF Standard -- 3.8 150
B81FMFLV Picture of 1/2 NPTF P.O. Check w/ Flush Manual Release and High Temp Seals NGT’s B81FMFLV is a pilot operated check valve with flow controls that prevents crash landings and cylinder bounce. The B81FMFLV has 1/2 NPTF in/out ports and 1/4 NPTF pilot port, high temperature seals, and a flush manual release. The B81FMFLV also can accommodate as low as 40 psi pilot pressure. Flow Control 1/2 NPTF 1/2 NPTF 1/4 NPTF Standard -- 3.8 150
B81FMFLK18V Picture of 1/2 NPTF P.O. Check w/ Flush Manual Release and High Temp Seals NGT’s B81FMFLK18V is a pilot operated check valve with flow controls that prevents crash landings and cylinder bounce. The B81FMFLK18V has 1/2 NPTF in/out ports and 1/4 NPTF pilot port, high temperature seals, and a flush manual release. The B81FMFLK18V also can accommodate as low as 25 psi pilot pressure. Flow Control 1/2 NPTF 1/2 NPTF 1/4 NPTF Standard -- 3.8 150
B81FMK18 Picture of 1/2 NPTF P.O. Check w/ Flush Manual Release and Low Pilot Spring NGT’s B81FMK18 is a standard pilot operated check valve that locks pneumatic devices in position. The B81FMK18 has 1/2 NPTF in/out ports and 1/4 NPTF pilot port, standard temperature seals, and a flush manual release. The B81FMK18 also can accommodate as low as 25 psi pilot pressure. Single PO Check 1/2 NPTF 1/2 NPTF 1/4 NPTF Standard -- 3.8 150
B81FMK18V Picture of 1/2 NPTF P.O. Check w/ Flush Manual Release and Low Pilot Spring and High Temp Seals NGT’s B81FMK18V is a standard pilot operated check valve that locks pneumatic devices in position. The B81FMK18V has 1/2 NPTF in/out ports and 1/4 NPTF pilot port, high temperature seals, and a flush manual release. The B81FMK18V also can accommodate as low as 25 psi pilot pressure. Single PO Check 1/2 NPTF 1/2 NPTF 1/4 NPTF Standard -- 3.8 150