How Do Pilot-Operated Check Valves Work?

Rachel Desenberg — Wed, 15 Jan 2014 19:55:29 +0000

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How Do Pilot-Operated Check Valves Work?

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. When the air flow stops, the poppet check the trapped air. When the valve is piloted, the trapped air is allowed to flow back out of the control valve.

In this demonstration, see the smooth, controlled motion that can be achieved with �ǳ�web's pilot-operated check valves.

Watch the Tech Tip Video:

Air pressure comes in to one of the pilot chambers of the check valve and opens up the check valve. At the same time, it allows pressure to come over to the other pilot-operated check valve and pilot it open to allow the exhaust to flow out of the cylinder. Two meter out flow controls control the speed of the cylinder and a simple TV-4 controls both check valves.

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Tech Tip

Pilot-Operated

Pilot Operated

Check Valve

Check Valves

�ǳ�web JPC Series Check Valves

Chris Agricola — Thu, 03 Nov 2011 15:42:46 +0000

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Product Information

�ǳ�web's Pilot-Operated Check Valves work as a standard check valve, but can be opened with an air pilot signal to permit free flow in the normally "checked" direction. These valves provide the user with a reliable method to check flow in one direction, with the ability to remotely signal a free flow through the valve. Ideal for any circuit that requires this useful function -- all in one valve that is easy to connect!

- High flow valve means low pressure drop

- Uses �ǳ�web's superior poppet design

- Variety of port configurations available

- "Auxiliary" Port 2 allows ease of plumbing

- Side Port (Port 2) rotates for ease of positioning

This circuit depicts a pneumatic cylinder being held in place at any location along its stroke. The use of the �ǳ�web Pilot-Operated Check Valve is the key to position control in this application. Auxiliary porting also simplifies connections and reduces the need for extra fittings.

Sample Uses (simplified symbols)

View JPC Valves Data Sheet

JPC-2NLN             JPC Valve, #10-32 - #10-32 - #10-32 Pilot
JPC-2NPN             JPC Valve, 1/8" NPT - 1/8" NPT - #10-32 Pilot
JPC-3FPN             JPC Valve, 1/8" NPT - 1/8" NPT - #10-32 Pilot
JPC-3FPF              JPC Valve, 1/8" NPT - 1/8" NPT - 1/8" NPT Pilot
JPC-3FQF             JPC Valve, 1/4" - 1/8" NPT - 1/8" NPT Pilot

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JPC

Check Valve

�ǳ�web Knowledgebase - Check Valve

How Do Pilot-Operated Check Valves Work?

How Do Pilot-Operated Check Valves Work?

�ǳ�web JPC Series Check Valves

Sample Uses (simplified symbols)