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Question for OPRV's on homemade blasters

Store bought pump OPRV's
homemade advice OPRV airguns

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#1 F man 47

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Posted 09 December 2014 - 07:52 AM

Hello friends,

I have been wondering about the state of OPRV's on homemade air plasters, particularly the hose handle and ball valve kind, i want to know if you have a simple ball valve air blaster, and attach a ball pump to the blaster via PVC couplings, does there need to be a external OPRV too in the blaster or is the ball valve OPRV enough to hold the pressure. I created my own hose handle air blaster a few months ago but since i finished the project air has been leaking through the pump it self, in the shaft area with a small crack. I have tested the pump in water and found the leak, but all attempts to patch the leak fail, with super glue, epoxy. And also the hose handle baster cannot hold air pressure for more than 15 seconds before all the pressure is lost. There are no other leaks in the blaster and this has also been happening to my other blaster with ball pumps. Could it be that i am pumping too hard (3 pumps) and the air is leaking through the OPRV, or should that not happen?

Thanks.


Edited by Aeromech, 23 November 2015 - 01:37 AM.

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#2 Droid31

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Posted 09 December 2014 - 08:32 AM

Hello friends,

I have been wondering about the state of OPRV's on homemade air plasters, particularly the hose handle and ball valve kind, i want to know if you have a simple ball valve air blaster, and attach a ball pump to the blaster via PVC couplings, does there need to be a external OPRV too in the blaster or is the ball valve OPRV enough to hold the pressure. I created my own hose handle air blaster a few months ago but since i finished the project air has been leaking through the pump it self, in the shaft area with a small crack. I have tested the pump in water and found the leak, but all attempts to patch the leak fail, with super glue, epoxy. And also the hose handle baster cannot hold air pressure for more than 15 seconds before all the pressure is lost. There are no other leaks in the blaster and this has also been happening to my other blaster with ball pumps. Could it be that i am pumping too hard (3 pumps) and the air is leaking through the OPRV, or should that not happen?

Thanks.


To me it sounds like (but I may be wrong) it sounds like you need a check valve not a oprv.
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#3 F man 47

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Posted 10 December 2014 - 02:33 AM

To me it sounds like (but I may be wrong) it sounds like you need a check valve not a oprv.


Sorry, thats what i meant when I said the ball pump's valve. All ball pumps do have check valves in them? If not how can I add one to the pump so the air does not leak out of the pump?
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#4 XCS2

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Posted 10 December 2014 - 08:57 PM

I think that most ball pumps do have a check valve. But, there are quite a few guides to make one, like this.
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