Difference between revisions of "Sprinkler valve modification"

m (+cat)
Line 3: Line 3:
 
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.
 
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.
+
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]]
 
[[category:valves]]

Revision as of 18:51, 24 October 2005

This refers to 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 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 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.