I still don't understand why there is no user manual, or list of o ring sizes. Never seen this with any other platform. Seems a little slipshod to me. Now on to the leaking issue. I found an issue and have corrected it. Travis suggested that at my power levels with slugs it might be to my advantage to shoot the gun with the valve in a more normal configuration. In other words, not using the balance chamber as such. I made a poppet with a solid stem and put a heavier spring "over" the poppet extension that normally goes in the chamber. It is a stronger cut down Maximus spring. This has ended theleak completely. Now to carry the thinking further, I would seem the light pressure in a balanced valve keeping the valve poppet against the seat simply is not enough at higher fpe numbers. Doing this conversion puts much more pressure on the poppet to seat. Seems that by increasing the spring pressure in the actual balance chamber would do the same. I am getting no leaks in the non balanced chamber version,k however, needing a much stronger hammer spring, it is very stiff cocking and the fps is not equal to the balanced chamber configuration. Next I will go back to a balanced chamber set up, and put a second light spring on the thimble against the top of the balance chamber to add pressure to the poppet to seat. I think going to the non balanced configuration for a short time has revealed the issue very strongly. Simply not enough spring to keep the poppet to seat pressure high enough. to further illustrate this, one coil snapped off the inner spring in the chamber. The loss of one coil was enough to keep the poppet sealed. It is that much on the edge of not being enough pressure on it. Kinda tells the tell. We need more spring pressure in the thimble particularly in higher fpe configurations. . Knife
To that note, I put 3200 psi against my SS2 and it still leaks. I still need the valve seat O-ring size if any one will help out here.
Quote from: KnifeMaker on June 05, 2020, 12:25:56 AMI still don't understand why there is no user manual, or list of o ring sizes. Never seen this with any other platform. Seems a little slipshod to me. Now on to the leaking issue. I found an issue and have corrected it. Travis suggested that at my power levels with slugs it might be to my advantage to shoot the gun with the valve in a more normal configuration. In other words, not using the balance chamber as such. I made a poppet with a solid stem and put a heavier spring "over" the poppet extension that normally goes in the chamber. It is a stronger cut down Maximus spring. This has ended theleak completely. Now to carry the thinking further, I would seem the light pressure in a balanced valve keeping the valve poppet against the seat simply is not enough at higher fpe numbers. Doing this conversion puts much more pressure on the poppet to seat. Seems that by increasing the spring pressure in the actual balance chamber would do the same. I am getting no leaks in the non balanced chamber version,k however, needing a much stronger hammer spring, it is very stiff cocking and the fps is not equal to the balanced chamber configuration. Next I will go back to a balanced chamber set up, and put a second light spring on the thimble against the top of the balance chamber to add pressure to the poppet to seat. I think going to the non balanced configuration for a short time has revealed the issue very strongly. Simply not enough spring to keep the poppet to seat pressure high enough. to further illustrate this, one coil snapped off the inner spring in the chamber. The loss of one coil was enough to keep the poppet sealed. It is that much on the edge of not being enough pressure on it. Kinda tells the tell. We need more spring pressure in the thimble particularly in higher fpe configurations. . KnifeOr a different balance ratio that puts a bit more pressure on sealing against a peek surface...peek doesn't do well at very low sealing forces and needs its surface to be impeccable and very true to whatever it mates to, to seal well...I wouldn't know the ratio or the forces the poppet sees at various pressures so I cannot state this to be the case for sure...You can run a slightly larger poppet to offset the over balance in the valve if it is an issue.Or as you mentioned run more spring in the balance chamber but that chamber should be tiny and very limited in space / spring rating which would need redesigned to the likes of motorheads v2 of this valve to accommodate much stiffer springs. JMO.Peek works best with VERY small sealing margins as this material basically just doesn't compress, and running paper thin margins to the likes of .015"-.025" help peek seal. Its compressive strength is to the likes of 25,000 psi and doesn't yield until 16,000 psi.
Well, the O-ring is pretty messed up. It came out oblong from the factory, plus all my drill spinning. I was hoping those that are clearly in the know would help out with the size real quick. After all they are still air gunners at the core I would still like to think, and we typically help each other out. If I have to go it alone, I can do that, too.
Jason is correct 8-12 number orings in poly. The plungers however are very different.
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