Paladin
Contributor
What's wrong with the diaphragm it has? If it's still soft and supple and no cracks, use it.
Old regs, worth playing with?
- Thread starter deadly_risk
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OP
deadly_risk
Contributor
Cool, then nothing is wrong with its diaphragm. I assumed it should be replaced too, but nothing seems wrong with it.
That is really neat that a reg that old can have its o-rings replaced and be back in usable condition.
Paladin
Contributor
That's one of the things I like about them.
Paladin
Contributor
I just bought a package of two USD Aquarius regulators and a USD Conshelf XII off Ebay for $40. That gives me a total of 5 Aquarius' in my collection. I just had a thought as I was making the payment. I've got one old Aquarius first stage here that the chrome is all gone from inside the piston barrel. It still works and the O rings seem to be in good shape. You want it for parts? You could use the piston as is with the O rings installed to put in yours to use while you gather some spare O rings. Later, then, you can replace all the O rings and have two first stages. Just about any second stage will work with them.
Ya want it?
Ya want it?
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Hello DeadlyRisk,
Someone here should know the correct o-ring sizes and hopefully will post them and make the rest of the following garbage moot.
I probably do not need to tell you it is unwise to measure old o-rings in order to find the size needed. If memory serves me correctly, you should be able to determine the correct size by measuring the groove outside diameter (O.D.) Note that o-rings should be slightly stretched (1-5% with 2% being recommended) Therefore, after you measure the groove, multiply by 0.98 to find the inside diameter (I.D.) of the o-ring you need. Almost all regulator o-rings have a cross section (c.s.) of 1/16" therefore any o-ring with a 0 after the dash will have a c.s. of 1/16 and that make finding the correct seal pretty simple.
For instance, if you measure the small piston groove and get a dimension: 0.116 multiply by 0.98 to get the I.D. 0.11368 you need and find the closest match with a dash number of 0 at a site like What is AS568A? and you come up with a -006.
We Usual Suspects like to debate over the material, but I think most of us agree you cannot go wrong with Viton or EPDM. For hardness in low pressure applications 70-75 is fine, for high pressure go with 90.
......now where did I put that Parker manual?....
Couv
Paladin
Contributor
I would like to know the sizes myself. I have always used rebuild kits but my old source of kits has run out and since Slonda828 stopped selling them, it looks as if I am going to have to make up my own kits.
OP
deadly_risk
Contributor
What happened? I thought he had quite a good thing going.
OP
deadly_risk
Contributor
Paladin
Contributor
I just got an email from Slonda828. The O ring size is the last 3 digits of the old USD part number. Like part number 3 is part number 8201-13; the O ring size is 113. McMaster-Carr sells AS568A O-rings in different materials. I would suggest the Viton or EPDM ones. Just go to this link:
http://www.mcmaster.com/#as568a-o-rings/=77vqrb
select the EPDM material, then enter the size. They sell the O-rings in packages of 100 O-rings.
I also have a couple of lines on HP seats that I'll check into and get back with you.
http://www.mcmaster.com/#as568a-o-rings/=77vqrb
select the EPDM material, then enter the size. They sell the O-rings in packages of 100 O-rings.
I also have a couple of lines on HP seats that I'll check into and get back with you.
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