What is a standard 'drip' size in water, and how do you create one?
What is a standard 'drip' size in water, and how do you create one?
(OP)
We are testing valve for seat leakage, and rather than wait 10 minutes for a reasonable volume to accumulate, we would rather count the drips.
Is there a standard drip forming device?
Or its off to the kitchen sink for testing?
Is there a standard drip forming device?
Or its off to the kitchen sink for testing?





RE: What is a standard 'drip' size in water, and how do you create one?
TTFN
RE: What is a standard 'drip' size in water, and how do you create one?
Valve manufacturers rate seat tightness by classes. A bubble tight seat is at least a Class IV. Tightess seat is a Class V as I recall. You might want to compare your results to the seat tightness stds.
RE: What is a standard 'drip' size in water, and how do you create one?
RE: What is a standard 'drip' size in water, and how do you create one?
I have inspected some hydrostatic tests with valves and have found that depending on the design, some valves pass more at low pressure and others pass more at increased pressures. Can you confirm this to be so, with your tests. To make a valve tight shut-off, suppliers usually grease the seats and the disc. So we usually request the valve to be de-greased for testing.
RE: What is a standard 'drip' size in water, and how do you create one?
1 drop per second = 1/12 ounce per minute
2 drops per second = 1/3 ounce per minute
Drops breaking to stream = 2 ounces per minute
1/16" stream = 7.5 ounces per minute
1/8" stream = 23 ounces per minute
3/16" stream = 39 ounces per minute
1/4" stream = 83 ounces per minute
Sorry about the imperial units!!
Hope this helps.
Brian
RE: What is a standard 'drip' size in water, and how do you create one?
RE: What is a standard 'drip' size in water, and how do you create one?