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 ([[diaphram 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. | + | 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 [[honking|honks]], as this involves opening and closing rapidly - should one measure it from begining of opening to end of honking, or from beginging to the most open part of the first vibration? | This author is confused as to what the number is when the valve [[honking|honks]], as this involves opening and closing rapidly - should one measure it from begining of opening to end of honking, or from beginging to the most open part of the first vibration? | ||
Revision as of 22:51, 21 October 2005
"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 (diaphram 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 begining of opening to end of honking, or from beginging to the most open part of the first vibration?
