Quick-exhaust valve - Revision history

Benstern: added links and removed dead link

2008-06-01T12:21:06Z

added links and removed dead link

← Older revision		Revision as of 07:21, 1 June 2008
Line 1:		Line 1:
	'''Quick-exhaust valves''' ('''QEVs''' for short) are ready-made piston or diaphragm ~~valves~~, designed to quickly exhaust pneumatic cylinders. They work somewhat similarly to [[sprinkler valve modification\|pneumatically modified]] [[sprinkler valve]]s, they are more expensive and harder to find, but also perform better.		'''Quick-exhaust valves''' ('''QEVs''' for short) are ready-made [[piston valve]]s or [[diaphragm valve]]s, designed to quickly exhaust pneumatic cylinders. They work somewhat similarly to [[sprinkler valve modification\|pneumatically modified]] [[sprinkler valve]]s, they are more expensive and harder to find, but also perform better.

	QEVs need a separate [[pilot valve]] for triggering. They can be very sensitive, triggering at a pressure drop of a few psi, so care should be taken when filling with a [[schrader valve]] or other ~~valves~~ that will let out air when disconnected.		QEVs need a separate [[pilot valve]] for triggering. They can be very sensitive, triggering at a [[pressure]] drop of a few psi, so care should be taken when filling with a [[schrader valve]] or other [[valve]]s that will let out air when disconnected.

	Most QEVs are designed to be filled from the pilot side, and will typically work well using a 3-way valve as the fill/pilot valve. Some QEVs will also work when filled from the chamber side.		Most QEVs are designed to be filled from the pilot side, and will typically work well using a 3-way valve as the fill/pilot valve. Some QEVs will also work when filled from the [[chamber]] side.

	Small QEVs are sometimes used as pilots for larger valves, often to allow the use of a [[blowgun]] as the trigger.		Small QEVs are sometimes used as pilots for larger valves, often to allow the use of a [[blowgun]] as the trigger.

	~~http://www.bpe950.com/becker/products/control-inst/accessories/QEV-productIMG.jpg~~

Jimmy101 at 15:01, 16 November 2007

2007-11-16T15:01:07Z

← Older revision		Revision as of 10:01, 16 November 2007
Line 10:		Line 10:


			As pressure is applied through input port 1 the poppet (yellow) shifts forward blocking the exhaust port 3 and allowing flow through output port 2.

	~~As pressure is applied through input port 1 the poppet shifts forward blocking the exhaust port and allowing flow through output port 2.~~		When pressure is removed from input port 1 back pressure at port 2 unseats the poppet and allows flow through exhaust port 3.

	When pressure is removed from input port 1 back ~~flow~~ at port 2 unseats the poppet and allows flow through exhaust port 3.

	[[Image:Qev.gif]]		[[Image:Qev.gif]]

	[[category:valves]]		[[category:valves]]

Benstern: Added animation

2007-01-13T22:19:16Z

Added animation

← Older revision		Revision as of 17:19, 13 January 2007
Line 8:		Line 8:

	http://www.bpe950.com/becker/products/control-inst/accessories/QEV-productIMG.jpg		http://www.bpe950.com/becker/products/control-inst/accessories/QEV-productIMG.jpg



			As pressure is applied through input port 1 the poppet shifts forward blocking the exhaust port and allowing flow through output port 2.

			When pressure is removed from input port 1 back flow at port 2 unseats the poppet and allows flow through exhaust port 3.

			[[Image:Qev.gif]]

	[[category:valves]]		[[category:valves]]

Saladtossser: better QEV picture

2006-04-01T18:29:05Z

better QEV picture

← Older revision		Revision as of 13:29, 1 April 2006
Line 7:		Line 7:
	Small QEVs are sometimes used as pilots for larger valves, often to allow the use of a [[blowgun]] as the trigger.		Small QEVs are sometimes used as pilots for larger valves, often to allow the use of a [[blowgun]] as the trigger.

	http://www.~~pbreview~~.com/~~pics~~/~~1057167629~~.jpg		http://www.bpe950.com/becker/products/control-inst/accessories/QEV-productIMG.jpg

	[[category:valves]]		[[category:valves]]

Benstern: category

2006-03-18T20:34:02Z

GalFisk: formatting

2006-03-13T08:50:39Z

formatting

← Older revision		Revision as of 03:50, 13 March 2006
Line 6:		Line 6:

	Small QEVs are sometimes used as pilots for larger valves, often to allow the use of a [[blowgun]] as the trigger.		Small QEVs are sometimes used as pilots for larger valves, often to allow the use of a [[blowgun]] as the trigger.

	http://www.pbreview.com/pics/1057167629.jpg		http://www.pbreview.com/pics/1057167629.jpg

71.96.163.209 at 22:11, 12 March 2006

2006-03-12T22:11:01Z

← Older revision		Revision as of 17:11, 12 March 2006
Line 6:		Line 6:

	Small QEVs are sometimes used as pilots for larger valves, often to allow the use of a [[blowgun]] as the trigger.		Small QEVs are sometimes used as pilots for larger valves, often to allow the use of a [[blowgun]] as the trigger.
			http://www.pbreview.com/pics/1057167629.jpg

66.239.165.18 at 20:53, 6 December 2005

2005-12-06T20:53:16Z

← Older revision		Revision as of 15:53, 6 December 2005
Line 1:		Line 1:
	'''Quick-exhaust valves''' ('''QEVs''' for short) are ready-made piston or diaphragm valves, designed to quickly exhaust ~~pnematic~~ cylinders. They work somewhat similarly to [[sprinkler valve modification\|pneumatically modified]] [[sprinkler valve]]s, they are more expensive and harder to find, but also perform better.		'''Quick-exhaust valves''' ('''QEVs''' for short) are ready-made piston or diaphragm valves, designed to quickly exhaust pneumatic cylinders. They work somewhat similarly to [[sprinkler valve modification\|pneumatically modified]] [[sprinkler valve]]s, they are more expensive and harder to find, but also perform better.

	QEVs need a separate [[pilot valve]] for triggering. They can be very sensitive, triggering at a pressure drop of a few psi, so care should be taken when filling with a [[schrader valve]] or other valves that will let out air when disconnected.		QEVs need a separate [[pilot valve]] for triggering. They can be very sensitive, triggering at a pressure drop of a few psi, so care should be taken when filling with a [[schrader valve]] or other valves that will let out air when disconnected.

GalFisk: +piston, etc

2005-10-24T13:11:33Z

+piston, etc

← Older revision		Revision as of 08:11, 24 October 2005
Line 1:		Line 1:
	~~These~~ are ~~similar in how they~~ work to [[sprinkler valve]]~~s (they are~~ [[~~diaphram~~ valve]]s ~~too). They~~ are more expensive and harder to find, but also ~~preform~~ better~~. They don't come with a solenoid valve like the sprinklers do, so you'll have to furnish your own [[pilot valve]]~~.		'''Quick-exhaust valves''' ('''QEVs''' for short) are ready-made piston or diaphragm valves, designed to quickly exhaust pnematic cylinders. They work somewhat similarly to [[sprinkler valve modification\|pneumatically modified]] [[sprinkler valve]]s, they are more expensive and harder to find, but also perform better.

	~~Since they are designed to quickly exhaust pnematic cylinders~~, ~~they~~ are designed to be filled from ~~behind~~ the ~~diaphragm~~ and typically work well using a 3-way valve as the fill/pilot valve.		QEVs need a separate [[pilot valve]] for triggering. They can be very sensitive, triggering at a pressure drop of a few psi, so care should be taken when filling with a [[schrader valve]] or other valves that will let out air when disconnected.

			Most QEVs are designed to be filled from the pilot side, and will typically work well using a 3-way valve as the fill/pilot valve. Some QEVs will also work when filled from the chamber side.

			Small QEVs are sometimes used as pilots for larger valves, often to allow the use of a [[blowgun]] as the trigger.

68.97.133.20 at 02:30, 22 October 2005

2005-10-22T02:30:33Z

← Older revision		Revision as of 21:30, 21 October 2005
Line 1:		Line 1:
	These are similar in how they work to [[sprinkler valve]]s (they are [[diaphram valve]]s too). They are more expensive and harder to find, but also preform better. They don't come with a solenoid valve like the sprinklers do, so you'll have to furnish your own [[pilot valve]].		These are similar in how they work to [[sprinkler valve]]s (they are [[diaphram valve]]s too). They are more expensive and harder to find, but also preform better. They don't come with a solenoid valve like the sprinklers do, so you'll have to furnish your own [[pilot valve]].

			Since they are designed to quickly exhaust pnematic cylinders, they are designed to be filled from behind the diaphragm and typically work well using a 3-way valve as the fill/pilot valve.

← Older revision		Revision as of 15:34, 18 March 2006
Line 8:		Line 8:

	http://www.pbreview.com/pics/1057167629.jpg		http://www.pbreview.com/pics/1057167629.jpg

			[[category:valves]]