Posted by: Felix "flu" Lu on June 02, 2003 at 13:18:27

Good point. I hadn't considered the fact that the remote line is still under pressure from the tank while it is in use (which is obvious now that you mention it!). I just figured that the very large surface area of the remote line would absorb enough heat over it's length to warm up any liquid enough so that it becomes a gas. Oh well, this becomes a quantitative problem now...no sense in arguing qualitatively. : : That's true what you are saying. But with the length of the hose (esp. a coiled hose), the volume and the extra heat from all the extra surface area, don't you think that the liquid would completely vaporize before it got to the gun? : No more so than it would in the tank. There are three ways you could cause liquid to convert to gas. : 1 - remove some gas, which lowers the pressure. This is what happens when you shoot - the drawback is that it also makes things cooler which if it lowers the temperature of the liquid below its boiling point, keeps it from boiling more until it warms up. : 2 - add heat - as the temperature of the liquid increases, it will boil more gas into liquid (this comes naturally just from absorbing heat from the air around the tank and from sunshine on the tank.) : 3 - Increase the volume of the container, because this putting the same gas/liquid into a larger container will lower the pressure. You can't do this by putting in a remote or expansion chamber, becuse while they new set-up (tank plus chamber/remote) will have more volume, it won't *increase* in volume while you are using it. If you had the remote shut-off, and then opened the valve, filling the remote, the volume of the space will increase at that moment, and then it will remain the same the rest of the time. : See you on the field, : -Bill Mills

Follow Ups: Post a Followup Show your name as: DefaultRealnameBothNickname E-Mail address (eg: joeschmoe@aol.com): Show your e-mail address? DefaultYesNo Your Password: Don't have a password? CLICK HERE - Forgot your password? CLICK HERE Subject: Subject:Message: : Good point. I hadn't considered the fact that the remote line is still under pressure from the tank while it is in use (which is obvious now that you mention it!). I just figured that the very large surface area of the remote line would absorb enough heat over it's length to warm up any liquid enough so that it becomes a gas. Oh well, this becomes a quantitative problem now...no sense in arguing qualitatively. : : : : That's true what you are saying. But with the length of the hose (esp. a coiled hose), the volume and the extra heat from all the extra surface area, don't you think that the liquid would completely vaporize before it got to the gun? : : No more so than it would in the tank. There are three ways you could cause liquid to convert to gas. : : 1 - remove some gas, which lowers the pressure. This is what happens when you shoot - the drawback is that it also makes things cooler which if it lowers the temperature of the liquid below its boiling point, keeps it from boiling more until it warms up. : : 2 - add heat - as the temperature of the liquid increases, it will boil more gas into liquid (this comes naturally just from absorbing heat from the air around the tank and from sunshine on the tank.) : : 3 - Increase the volume of the container, because this putting the same gas/liquid into a larger container will lower the pressure. You can't do this by putting in a remote or expansion chamber, becuse while they new set-up (tank plus chamber/remote) will have more volume, it won't *increase* in volume while you are using it. If you had the remote shut-off, and then opened the valve, filling the remote, the volume of the space will increase at that moment, and then it will remain the same the rest of the time. : : See you on the field, : : -Bill Mills [ Follow Ups ] [ Post Followup ] [ WARPIG Tech Talk - Air ]