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The need for a better functioning of valve is fulfilled by the use of a pilot operated check valve. Pilot operated check valve allows the forward as well as reverse flow with the help a external pilot pressure signal. Basic types of pilot operated check valves are, 4C valve; 2C valve
Also known as blocking valves, these valves are activated by an air signal to turn equipment on and off. They allow airflow when an air signal is applied to the air pilot. When the air supply is removed, the valve closes, trapping air in the system.
Pilot operated check valves work by allowing free flow from the inlet port through the outlet port. Supplying a pilot pressure to the pilot port allows flow in the opposite direction. Air pressure on top of the poppet assembly opens the seal allowing air to flow freely.
Parker offers a large collection of pilot-operated (PO) check valves, which are check valves that can be opened by an external pilot pressure. There are two types of pilot operated check valves: threaded cartridge style and pilot piston style.
Pilot-operated check valves, like pressure-pilot check valves and flow-pilot check valves, offer precise hydraulic flow control in one direction. These valves use a secondary pilot pressure signal, independent of the main system pressure, to open and allow flow.
CK*B & CK*D Standard Pilot Operated Check Valve. 3-Port Non-Vented • Standard 3-port models with 3:1 pilot ratios suitable for most applications • Steel seats with a leakage rate of 1 drop/min. • L control (shown) allows load to be manually released • Standard pilot piston seals allow bleed-through feature for air bleed
Explore the Danfoss line of pilot operated check valves, including screw in cartridge valves and inline valves designed for optimal load holding performance.
These pilot operated check valves operate as a direct check valve but can also be opened by pilot pressure, on the control piston, to permit free reverse ow. The amount of pilot pressure required to open the valve is stated as a ratio of the pressure above the check to the pilot pressure.
PILOT OPERATED CHECK VALVES. They are non-modulating valves which allow free flow through the check valve into the actuator (V2 to C2) and then block the reverse flow until they feel a pilot pressure directly proportional to the load in the pilot line, so that the pilot piston can push the check poppet off its seat.
A pilot-operated check valve, also known as a pilot-operated relief valve, is a type of hydraulic or pneumatic valve that controls the flow of fluid in one direction while allowing free flow in the opposite direction.