There are a couple of things I notice.
firstly, the o ring in the photo looks to be of particularly bad quality, the seem running down the middle should be almost undetectable. Those little pieces of rubber flashing can’t help with creating a perfect seal.
other than cost, why on earth would you make the entire piston out of delrin? Yes it seals well but is is too elastic to give a consistent force onto the sealing face. When the reg in my impact starts to creep or leak or both, (it almost certainly will) I shall replace it with one made from brass that has a delrin sealing face.
For what it’s worth, I always de-burr the belville washers when I build a reg, two reasons, it’s stops them scratching up the shaft of the reg core and it allows the washer s to stack more evenly. I can’t prove this helps but I am absolutely positive it doesn’t make things worse.
Bb
firstly, the o ring in the photo looks to be of particularly bad quality, the seem running down the middle should be almost undetectable. Those little pieces of rubber flashing can’t help with creating a perfect seal.
other than cost, why on earth would you make the entire piston out of delrin? Yes it seals well but is is too elastic to give a consistent force onto the sealing face. When the reg in my impact starts to creep or leak or both, (it almost certainly will) I shall replace it with one made from brass that has a delrin sealing face.
For what it’s worth, I always de-burr the belville washers when I build a reg, two reasons, it’s stops them scratching up the shaft of the reg core and it allows the washer s to stack more evenly. I can’t prove this helps but I am absolutely positive it doesn’t make things worse.
Bb
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