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Old 10-28-2009, 06:08 AM   #1
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Is there any such thing as....


a valve that you open, and it closes itself slowly, over the course of a minute or two?

Thanks!

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Old 10-28-2009, 06:24 AM   #2
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Is there any such thing as....


Like the ones in public bathroom faucets?

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Old 10-28-2009, 06:27 AM   #3
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yeah, but slower closing...

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Old 10-28-2009, 06:44 AM   #4
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Is there any such thing as....


For something that slow, you may need to go with a servo actuated valve. I'm sure a commercial/industrial plumber/HVAC person could probably get you a source. What are you making now?
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Old 10-28-2009, 07:35 AM   #5
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Is there any such thing as....


Delta makes some slow closing faucets. They are commercial grade. The ones I've seen are adjustable for closing time (up to a point).

These are lav faucets:

http://www.deltacommercialfaucets.co...s/701-HDF.html

http://www.instawares.com/lavatory-f...0-1109.0.7.htm

Here's a slow closing stop valve.

http://www.homedepot.com/webapp/wcs/...41&marketID=68
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Old 10-28-2009, 07:47 AM   #6
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thanks! any idea how many gallons of water go through a 1/2" pipe in one minute at 40psi?

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Old 10-28-2009, 08:34 AM   #7
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Is there any such thing as....


Try this formula.
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Old 10-28-2009, 08:42 AM   #8
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thanks, but the .doc didn't open right for me.... can't ya just tell me? lol

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Old 10-28-2009, 12:50 PM   #9
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A 1/2" bore will discharge 47 GPM @ 40 PSI. The 40 PSI is measured at the bore, meaning there is no allowance for pressure loss in any of the piping leading to the discharge.

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