Difference between revisions of "Opening time"
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"Opening time" is the time it takes a valve to open, and as expected, is most important when the barrel dwell time is low. The approximate opening time of some valves: | "Opening time" is the time it takes a valve to open, and as expected, is most important when the barrel dwell time is low. The approximate opening time of some valves: | ||
* [[Burst disk]]s Practicaly instant... most likely under a millisecond. | * [[Burst disk]]s Practicaly instant... most likely under a millisecond. | ||
| − | * Pilot operated valves ([[ | + | * Pilot operated valves ([[diaphragm valve]]s, [[piston valve]]s): 3-5ms. |
* [[Ball valve]]s: about 100 ms hand-actuated, maybe 20-30 spring-actuated. | * [[Ball valve]]s: about 100 ms hand-actuated, maybe 20-30 spring-actuated. | ||
Revision as of 10:00, 6 January 2007
"Opening time" is the time it takes a valve to open, and as expected, is most important when the barrel dwell time is low. The approximate opening time of some valves:
- Burst disks Practicaly instant... most likely under a millisecond.
- Pilot operated valves (diaphragm valves, piston valves): 3-5ms.
- Ball valves: about 100 ms hand-actuated, maybe 20-30 spring-actuated.
The GGDT will give you a graph of your valve opening. (valve position vs. time or projectile position)
This author is confused as to what the number is when the valve honks, as this involves opening and closing rapidly - should one measure it from beginning of opening to end of honking, or from beginning to the most open part of the first vibration?
