vm had problems at the field yesterday

scottieb · 10-08-2007, 07:55 PM

what does this mean?

i screw a full 7oz tank into the asa under the barrel. all is dandy for about 7 - 8 seconds. then co2 shoots out the hole in the side of the asa. obviously a problem.

A.C. Basbas · 10-08-2007, 08:41 PM

Put an oring in the ASA, then screw in your tank

Trust me, it sounds silly but it works.

Anonymous Coward · 10-08-2007, 10:22 PM

I'll add that Basbas's is advice is sound. What is happening is the liquid CO2 is getting past the tank CO2 ring and the valve is fully opened. By placing an extra oring into the face of the ASA you are lessoning the pin depression and adding an extra seal between the face of the valve and the ASA. The pressure from the torque you apply in screwing in the tank helps keep the oring/seal in place and less prone to shrinking.

It's a great trick and works well in soooooo many setups, not just the VM.

HurtCow · 10-08-2007, 10:48 PM

Just make sure to screw the tank securely against the o-ring. I've done this on cocker asa's to keep the reg turned where I wanted it, and the o-ring got sucked into the gas port because it wasn't snug.

HP_Lovecraft · 10-09-2007, 11:17 PM

Funny, I ran my VM on a siphon tank for 10 years, and never had a "shrinkage problem".

Maybe its an undersized oring? or a burr in the ASA threads?

nick

10-08-2007, 07:55 PM	#1 (permalink)
scottieb class clown Join Date: Aug 2006 Posts: 652	vm had problems at the field yesterday what does this mean? i screw a full 7oz tank into the asa under the barrel. all is dandy for about 7 - 8 seconds. then co2 shoots out the hole in the side of the asa. obviously a problem. __________________ constantly looking for a predator cocker. my feedback

10-08-2007, 08:41 PM	#2 (permalink)
A.C. Basbas Pants Mafia Join Date: Feb 2007 Location: Maynard, Massachusetts. Posts: 2,305	Put an oring in the ASA, then screw in your tank Trust me, it sounds silly but it works. __________________ -Dragon Brigade- wWw #32 My WTB Thread ~ Eclipse Mag F/S/T MCB Feedback ~ PbN FeedBack

10-09-2007, 11:17 PM	#5 (permalink)
HP_Lovecraft Post Whore Join Date: Aug 2006 Location: Southern Maine Posts: 2,654	Funny, I ran my VM on a siphon tank for 10 years, and never had a "shrinkage problem". Maybe its an undersized oring? or a burr in the ASA threads? nick __________________ www.montneel.com My Myspace nonsense "the evidence strongly suggests that neither Billy nor Adam (Smart Parts) could have invented the electronic paintgun" -Garr M. King, U.S. Judge

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10-08-2007, 10:22 PM	#3 (permalink)
Anonymous Coward Active Member Join Date: Jul 2007 Posts: 153	I'll add that Basbas's is advice is sound. What is happening is the liquid CO2 is getting past the tank CO2 ring and the valve is fully opened. By placing an extra oring into the face of the ASA you are lessoning the pin depression and adding an extra seal between the face of the valve and the ASA. The pressure from the torque you apply in screwing in the tank helps keep the oring/seal in place and less prone to shrinking. It's a great trick and works well in soooooo many setups, not just the VM.