Difference between revisions of "Quick-exhaust valve"
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| − | + | '''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. | |
| − | + | 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. | |
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| + | 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. | ||
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| + | Small QEVs are sometimes used as pilots for larger valves, often to allow the use of a [[blowgun]] as the trigger. | ||
Revision as of 13:11, 24 October 2005
Quick-exhaust valves (QEVs for short) are ready-made piston or diaphragm valves, designed to quickly exhaust pnematic cylinders. They work somewhat similarly to pneumatically modified sprinkler valves, 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.
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.
