Double Acting Pneumatic Help

We have a double-acting piston (the one that is not spring-loaded) and were wondering if there was a way to close the a and b ports in the solenoid independently. Right now, since the port is on by default, it is always pulling the piston in. When we press b on our controller, it opens b as well, and it pushes against the air coming from a to open the piston. Then once we let go, it instantly goes back down since a is always open.

TLDR; Is there a way to close the solenoid ports a and b independently?


This document may be helpful: pneumatics information.pdf - Google Drive

My best guess is that you probably have an exhaust flow control attached to the pneumatic cylinder. This provides a speed control, but if closed all the way, would keep the cylinder from actuating. If this is the case, use a small straight-blade screwdriver to open the valve, or better yet, just use two straight fittings on the air cylinder. Otherwise, re-check the plumbing, and make sure there is enough air pressure so that the solenoid is shifting properly.

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I don’t believe there is a way for the solenoids to close independently. You might be able to use 2 of the solenoids for the single acting pistons.