Posted by: Dave Hall on May 06, 2003 at 16:46:12

1) Gun performance is largely a function of your valve. The bigger/faster the valve, the better. 2) Most people end up using sprinkler valves (because 'real' valves are too damned expensive). 1 + 2 got me thinking.... Has anybody ever really studied the problem of which is better; a 1" sprinkler valve or a 3/4" valve? On the surface, a 1" valve would be the obvious choice. Fully open it will provide nearly twice the flow rate as the 3/4" valve. But the parts commonality amongst residential sprinkler valves brings up an interesting point. If one goes with a servo actuator (ie, no manual dump), one is dealing with the same servo for either valve. This means that the air over the diaphram is allowed to escape at the same rate. The 1" valve has a physically larger diaphragm so it must lose more air. The final result of this rambling is to point out that a 3/4" valve will open faster than a 1" valve. So we've got competing factors: Bigger valves open further but they take longer to do so. Thus my question: Has anybody studied the problem to the extent that he/she can make some sort of definative statement about unmodified sprinkler valve usage in pneumatic cannons?

Follow Ups: The internals are the same Bill "Capt Bill" Tison 10:01:52 05/07/03 (12) Re: The internals are the same Dave Hall 19:10:25 05/11/03 (7) Re: The internals are the same Bill "Capt Bill" Tison 20:46:20 05/12/03 (2) Re: The internals are the same Dave Hall 11:13:26 05/16/03 (1) Not all models Michael "LCT_Paintball" Lyon 14:58:34 05/16/03 (0) Great! I love sims! Michael "LCT_Paintball" Lyon 13:55:17 05/12/03 (3) Re: Great! I love sims! Dave Hall 15:49:21 05/12/03 (2) Straight CO2 cannon? Tell me more! Bill "Capt Bill" Tison 20:52:19 05/12/03 (1) Re: Straight CO2 cannon? Tell me more! Michael "LCT_Paintball" Lyon 22:54:51 05/12/03 (0) Re: The internals are the same Peter Jones 14:35:13 05/08/03 (3) Cannons T.J. "Mad Scientist for the Tiger Tank" Allcot 01:53:10 05/10/03 (2) Re: Cannons Peter Jones 15:12:37 05/10/03 (0) Re: Cannons Peter Jones 15:11:27 05/10/03 (0) Re: Valve Selection T.J. "Mad Scientist for the Tiger Tank" Allcot 21:22:51 05/06/03 (0) another factor Michael "LCT_Paintball" Lyon 17:26:35 05/06/03 (1) Re: another factor Dave Hall 18:30:40 05/06/03 (0) 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: : : 1) Gun performance is largely a function of your valve. The bigger/faster the valve, the better. : 2) Most people end up using sprinkler valves (because 'real' valves are too damned expensive). : 1 + 2 got me thinking.... Has anybody ever really studied the problem of which is better; a 1" sprinkler valve or a 3/4" valve? : On the surface, a 1" valve would be the obvious choice. Fully open it will provide nearly twice the flow rate as the 3/4" valve. : But the parts commonality amongst residential sprinkler valves brings up an interesting point. If one goes with a servo actuator (ie, no manual dump), one is dealing with the same servo for either valve. This means that the air over the diaphram is allowed to escape at the same rate. The 1" valve has a physically larger diaphragm so it must lose more air. The final result of this rambling is to point out that a 3/4" valve will open faster than a 1" valve. : So we've got competing factors: Bigger valves open further but they take longer to do so. : Thus my question: Has anybody studied the problem to the extent that he/she can make some sort of definative statement about unmodified sprinkler valve usage in pneumatic cannons? [ Follow Ups ] [ Post Followup ] [ WARPIG Tank Talk ]