View Full Version : Check valve for P-Valve

01-10-2009, 15:05
am looking to make my own p-valve for another DS that I have. I want to make it balanced so I need a check valve. I have Vance Harlows book on DS repair and was going to follow the instructions that he has, but the check valve that he reccomends (well the pt number he gave and place to buy from) but they have minimum order of 25and I am not going to build that many p-valves. So have any of you made your own balanced p-valve, and if so what check valve did you use. I found some at usplastic here (http://www.usplastic.com/catalog/product.asp?catalog%5Fname=USPlastic&category%5Fname=45&product%5Fid=15641) and here (http://www.usplastic.com/catalog/product.asp?catalog%5Fname=USPlastic&category%5Fname=45&product%5Fid=20411) I just am not sure which would be best, if they would work at all... Does anyone know if the .5 crackign preassure would be OK, or would that still be to stiff.

Anyway, just looking for your experience if you have any with DIY p-valve


01-13-2009, 20:08
Look here pages 466 and 477

McMaster-Carr (http://www.mcmaster.com/)

01-13-2009, 20:55
I had looked at those. The only one that they have that may work is on pg 467 and it is a diaphram check valve rather than spring and ball, but the 1psi cracking pressure makes me a little nervour. I think that it would need to be less than that. Plus those are fairly big.

I just ordered a Salvo balanced p-valve today from ST. For the price it was worth it for me to not have to worry about getting the correct check valves and machining the valve. I considered just ordering 25 of the good check valve from Smart Products and then putting a bunch together and just selling them, but I have enough other projects going on right now that I did not want to mess with that....

Thanks for the reply, and taking the time to look...