HELP: Internal Solenoid Leaks Killed Us!

[ebarker]

Originally Posted by Daniel_LaFleur

Now on to how to test for internal leak of the Festo valve.

With the valve deenergized:
Apply pressure to the common (supply) port, seal off the Normally open port, and seal the normally open dump port with your thumb. If you can feel pressure building against your thumb then there is an internal leak against the normally open seat ... and the valve is bad.

With the valve energized:
Apply pressure to the common (supply) port, seal off the Normally closed port, and seal the normally closed dump port with your thumb. If you can feel pressure building against your thumb then there is an internal leak against the normally closed seat ... and the valve is bad.

I like the Festo valves when they work, but ....

Last year we had to go through 4 units to get 2 good units, using the above tests. And this year it was DOA. I was planning to buy some spares but gave up on the idea after the DOA.

Next year we will try again.