SpudFiles Wiki - User contributions [en]

Sprinkler valve modification

2005-10-24T18:51:01Z

70.179.125.201:

This refers to [http://www.spudfiles.com/forums/viewtopic.php?t=305 pneumatically modifying] a [[sprinkler valve]] to actuate via a pilot valve with a higher flow then the solenoid—typicaly a blowgun, although larger valves (1.5-2" and up) require something with more flow to preform well. The larger vent decreases [[opening time]], and does not require batteries like the stock solenoid.

Recent [http://forums.spudtech.com/topic.asp?TOPIC_ID=11028 research] by ssb73q of the [[SGTC]] indicates that using a small [[QEV]] as the pilot increases muzzle velocity and the consistency thereof. This is most likely because the time it takes to open is not variable, in contrast to a human opened blowgun.

Another modification that can be made is enlarging the pilot leak hole. If the Sprinkler valve is opened it contains a large diameter rubber disk (called the diaphragm). About 1/2-1" in somewhere around the diaphragm (in a oftenly used [http://www.orbitonline.com/index.cfm?fa=watermaster.product&productid=201 Orbit Watermaster] sprinkler valve) will be a small white plasic piece poked through the diaphragm. If this piece is removed, the pilot area above the diaphragm will be pressurized instantly while the cannon is being filled, and so the valve will be more sensitive and will (in some instances) seat better.

[[category:valves]]

Sprinkler valve modification

2005-10-23T23:40:34Z

70.179.125.201:

This refers to [http://www.spudfiles.com/forums/viewtopic.php?t=305 pneumatically modifying] a [[sprinkler valve]] to actuate via a pilot valve (is this the correct terminology?) - typicaly a blowgun, although larger valves (1.5-2" and up) require something with more flow to preform well. The larger vent decreases [[opening time]], and does not require batteries like the stock solenoid.

Recent [http://forums.spudtech.com/topic.asp?TOPIC_ID=11028 research] by ssb73q of the [[SGTC]] indicates that using a small [[QEV]] as the pilot increases muzzle velocity and the consistency thereof. This is most likely because the time it takes to open is not variable, in contrast to a human opened blowgun.

Another modification that can be made is enlarging the pilot leak hole. If the Sprinkler valve is opened it contains a large diameter rubber disk (called the diaphragm). About 1/2-1" in somewhere around the diaphragm (in certain brands) will be a small white plasic piece poked through the diaphragm. If this piece is removed, the pilot area above the diaphragm will be pressurized instantly while the cannon is being filled, and so the valve will be more sensitive and will (in some instances) seat better.

Barrel

2005-10-23T23:23:16Z

70.179.125.201:

There are many diameters of barrels popular in spudding, below are some that fit certain ammo:

* 4.5mm brakeline - fits bbs, good for [[BBMGs]]
* 6mm brakeline - fits airsoft bbs, a commonly used ammo in BBMGs.
* 3/4" CPVC, 3/4" sch 80 PVC (looser fit), or 3/4" sch 120 PVC - fits .68" paintballs
* 1/2" sch 40 PVC - fits AA batteries, marbles.
* 3/4" sch 40 PVC - fits 12g [[CO2 cartridge]]s, C batteries.
* 1" sch 40 PVC - D batteries, smaller sized bouncy balls.
* 1.25" sch 40 PVC - fits somesort of battery
* 1.5" sch 40 PVC - a common size, good trade-off between power and potato usage. [http://www.spudtech.com/components.asp Available rifled from the [[SGTC]]]
* 1.5" sdr 21 PVC - fits golfballs. Traditionally sleeved within SCH-80 PVC.
* 1.5" sdr 26 PVC - fits golfballs, but it is thinner than sdr 21, so the golfballs fit a little looser. Traditionally sleeved within 2" SCH-80 PVC.
* 2" sch 80 PVC fits sdr 21 and 26 pipe well. Also used as a golf ball barrel by itself, with the golf ball held in place by a rag patch, or other wadding. Also fits normal light bulbs! Details here: http://advancedspuds.com/concreteballs.htm
* 2.5" sch 40 PVC - fits tennis balls well.
* 3" sch 80 PVC - fits many drink bottles well.
* 3" sch 40 PVC - fits normal cans, and empty propane torch tanks