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piloting a piston valve

Posted: Mon Aug 22, 2011 12:57 pm
by mattyzip77
My piston valve will pilot with a q e v, however, will not pilot with a sprinkler valve, or a ball valve! Why???? Please note, the sprinkler valve works fine on all my other cannons and the piston in question is a 1 1/4 coupler, plugged at both ends, neoprene washer attached with a bolt going through the whole coupler. As I said, works great with the q e v!! Housed in a 2 inch Tee!

Posted: Mon Aug 22, 2011 1:18 pm
by Gippeto
Without knowing the SIZES of the valves you're attempting to use to pilot, and accepting that it DOES pilot with the qev...I'm gonna say:

Your piston is too loose.

Posted: Mon Aug 22, 2011 1:21 pm
by jackssmirkingrevenge
Gippeto wrote:Your piston is too loose.
Given the available data, I venture to agree with you.

Posted: Mon Aug 22, 2011 4:28 pm
by mattyzip77
Oops!!! Sorry guys. It works and or will pilot with a 3/4 inch q e v, and will not work or pilot with a 1 inch modded sprinkler valve, a 1/2 ball valve,and a 1/4 inch ball valve. I know the 3/4 inch q e v is the better pilot of all, however I was just trying to run some tests of my own. Oh ya, the sprinkler valve is modded through the top directly with a 1/4 inch blow gun!! :cry: :cry: :cry:

Posted: Mon Aug 22, 2011 4:42 pm
by jrrdw
If a 3/4" QEV will pilot the piston theres no reason what so ever a properly working 1" sprinkler valve wont pilot the same piston.

Posted: Mon Aug 22, 2011 4:42 pm
by jsefcik
mattyzip77 wrote:Oops!!! Sorry guys. It works and or will pilot with a 3/4 inch q e v, and will not work or pilot with a 1 inch modded sprinkler valve, a 1/2 ball valve,and a 1/4 inch ball valve. I know the 3/4 inch q e v is the better pilot of all, however I was just trying to run some tests of my own. Oh ya, the sprinkler valve is modded through the top directly with a 1/4 inch blow gun!! :cry: :cry: :cry:

Something is wrong with your piston, because alot of people use sprinkler valves for a pilot!!!

Posted: Mon Aug 22, 2011 4:53 pm
by mattyzip77
Yes Jesse, but what???? Thats what I am trying to figure out!!! :evil5: :evil5:

Posted: Mon Aug 22, 2011 4:56 pm
by mattyzip77
jrrdw wrote:If a 3/4" QEV will pilot the piston theres no reason what so ever a properly working 1" sprinkler valve wont pilot the same piston.
Thats what I thought, however it doesnt!! The sprinkler valve works fine on two other cannons and my supah valve!!
EDIT wtf, I did it again, :banghead: sorry! Thought I hit the edit button!

Posted: Mon Aug 22, 2011 5:04 pm
by jackssmirkingrevenge
Show us the piston? What sort of gap do you have between piston and chamber?