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10-28-2009, 08:08 AM
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#1
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011000100110111101101111
Join Date: Jul 2008
Location: SW Michigan
Posts: 3,525
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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!
DM
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10-28-2009, 08:24 AM
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#2
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Member
Join Date: Dec 2007
Location: Baltimore, MD
Posts: 1,610
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Like the ones in public bathroom faucets?
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10-28-2009, 08:27 AM
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#3
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011000100110111101101111
Join Date: Jul 2008
Location: SW Michigan
Posts: 3,525
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yeah, but slower closing...
DM
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10-28-2009, 08:44 AM
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#4
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Member
Join Date: Dec 2007
Location: Baltimore, MD
Posts: 1,610
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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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10-28-2009, 09:47 AM
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#6
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011000100110111101101111
Join Date: Jul 2008
Location: SW Michigan
Posts: 3,525
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thanks! any idea how many gallons of water go through a 1/2" pipe in one minute at 40psi?
DM
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10-28-2009, 10:34 AM
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#7
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General Contractor
Join Date: Jun 2009
Location: Stafford, VA
Posts: 458
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Try this formula.
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10-28-2009, 10:42 AM
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#8
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011000100110111101101111
Join Date: Jul 2008
Location: SW Michigan
Posts: 3,525
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thanks, but the .doc didn't open right for me.... can't ya just tell me? lol
DM
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10-28-2009, 02:50 PM
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#9
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gravity always wins
Join Date: Feb 2008
Location: Annville, PA
Posts: 1,184
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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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