I have my reg set to 125 bar it's shooting my 18.1 at 925 with superb accuracy. But my problem is that when the gun sets for a 10 15 min my first shots are 850 860 Ish then back to really consistent 925. This is why I wanna buy a new reg it's driving me crazy.
Vulcan .22 Speed low first 3 to 4 shots
- Thread starter Frank2533
- Start date
It seems that your regulator's brass screw may be backed out a bit too much. Try decreasing working pressure to a little below 125 BAR. It could be that the shaft inside the reg housing doesn't fully seat itself quickly enough (to prevent unregulated air from entering the regulated air chamber) until after the 10-15 minutes you indicated. This is one of the main reasons that cause this kind of problem.
If the advice above doesn't eliminate the problem, inspect the regulator for worn internal and external O-rings. You may also want to try cleaning and relubing the entire regulator assembly before reinstalling it. When you lube the O-rings, piston, and Belville washers, make sure that you do so only lightly. If the cause of your issue is not coming from a blown O-ring, it may just be that one of them (or more than one) is being extruded.
In my opinion, you do not need a new regulator. Most often, it's just a matter of cleaning and servicing the factory regulator to get it to perform the way it should. Bear in mind that even the best of air rifles leave the factory not optimized to perform at its best. In extreme cases, with respect to the issue at hand--though not even an intensive labor on the part of the self-tuner--it could be just a matter of resurfacing the delrin seat/seal/face that the reg piston shaft pushes itself against.
If the advice above doesn't eliminate the problem, inspect the regulator for worn internal and external O-rings. You may also want to try cleaning and relubing the entire regulator assembly before reinstalling it. When you lube the O-rings, piston, and Belville washers, make sure that you do so only lightly. If the cause of your issue is not coming from a blown O-ring, it may just be that one of them (or more than one) is being extruded.
In my opinion, you do not need a new regulator. Most often, it's just a matter of cleaning and servicing the factory regulator to get it to perform the way it should. Bear in mind that even the best of air rifles leave the factory not optimized to perform at its best. In extreme cases, with respect to the issue at hand--though not even an intensive labor on the part of the self-tuner--it could be just a matter of resurfacing the delrin seat/seal/face that the reg piston shaft pushes itself against.
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Year or two old. When I got my reg tester I put my reg in it but didn't push it all the way back. Then I pressurized it and it slammed my reg to the back of the chamber and stripped 2 threads off the brass screw. I took reg apart and nothing seemed messed up besides the stripped threads. I wouldn't think it would effect anything being that I never had the nut using them threads in the first place. Do you think that could cause any of my issues? Thank you for your input I will take it apart tonight and inspect it some more.
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The stripped threads on the brass adjuster screw could very well be the reason why you are having the issue. Perhaps there is some micro movement of it when the gun sits for a while, which might then cause negative air pressure creep; when the gun sits for a while the unregulated air pressure, being that it is greater than the air in the regulated air chamber, pushes the piston out, thus decreasing the air volume in the regulated air chamber. That could be why you are getting low-velocity initial shots when you wait for a good bit of time to take them. Try getting in touch with the manufacturer to see if you can be sent a new one. But try doing what I advised earlier first as it could just be an O-ring (or two) that needs to be replaced, or adjustment of the brass screw needs to be done.
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Sounds good man I will check it out. I was also wondering can you just by a new brass adjustment screw?
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I don't know if you can buy a new one. However, if the manufacturer can't mail a new one to you free of charge, I don't suppose it would be a problem for them if you pay for it instead. I have read positive feedback made about Evgeny, who is the owner of the company, when it comes to product support and service.
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As per Airgun Technology's website (www.airguntechnology.com) under the "contact" tab. I'd try sending an email:
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email Evgeny and he'll help you out.
What I have observed with regulators, almost all the regulators have a piston sealing on a plastic or polymer seat. With time the piston makes a mark on the seat and that is when it starts sealing instantly. That is when we say that the regulator has settled. You adjust the regulator either by moving the seat or the piston (incase of Fx regulator) which changes the piston and seat orientation. So the regulator takes longer to seal and again with some time start sealing quickly.
What I have observed with regulators, almost all the regulators have a piston sealing on a plastic or polymer seat. With time the piston makes a mark on the seat and that is when it starts sealing instantly. That is when we say that the regulator has settled. You adjust the regulator either by moving the seat or the piston (incase of Fx regulator) which changes the piston and seat orientation. So the regulator takes longer to seal and again with some time start sealing quickly.
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You tried adjusting the HSTA, there's a lot of time I have corrected the low speed idle. It's a long proses, 1st adjust HSTA till speed start to slow down than shoot a mag full let it idle till the time you experance the slow speed. This is trouble shooting the reg for leaky piston delrine. When they leak a little and seal the regulated pressure will be higher so the HS will not open the valve fully till pressure is back to normal --- so that is way it's consistent while you are shooting.
You dont don't need a whole new reg.
Just resurface the delrine seat.
that reg is one of the best,
Evgery just shaking his head side to side reading the whole post!
You dont don't need a whole new reg.
Just resurface the delrine seat.
that reg is one of the best,
Evgery just shaking his head side to side reading the whole post!
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Okay that makes sense as soon as I get my air supply back I'll test it out. What do you mean by resurfacing the delrin seat?
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make sure you have adjusted and tested all other before messing with the VS seat. the white delrine is the seat there is no hole in the middle---just stain from the air.
the brass supply adjustable seat mate up with the delrine to shutout the air supply when set pressure is reach.
you can cut and reshape or remove and install other seat then reshape and smooth out the seating area. .
the brass supply adjustable seat mate up with the delrine to shutout the air supply when set pressure is reach.
you can cut and reshape or remove and install other seat then reshape and smooth out the seating area. .
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