DIFFERERTIAL PRESSURE VALVE

mike terry

WOULD ANYONE KNOW WHERE I COULD PURCHASE A LARGE VALVE OF THIS TYPE?

Paul Rohrs_2

Bypass?....

Are you looking for a pressure differential bypass valve? Wirsbo has them available in 34" and 1". What flow rate are you looking for?

PR

BillW@honeywell

Differential Pressure Regulator(Valve?)

If a valve that maintains a constant differential between the supply & return sides of a hydronic system is what you're looking for, try the Honeywell D146. It is available in two sizes, D146M1032 3/4" for 18 gpm or D146M1040 1&1/4" for 50 gpm. Contact any Honeywell distributor, or call 401 738 4290, choose option 6.

Joe Lambert

Larger Yet

Spence makes pilot operated differential pressure valves up to 6", this is not for home use, too big.
Look at: http://www.spenceengineering.com/Handbook/n_pilot.pdf

Art Pittaway

What's it for?

Cal-Val (Clayton Valve, Newport Beach, Ca.,) makes them thru 24" I believe. But, they are not for hot water service, max temp. 180*f. Application makes a huge difference to the valve and mfg. co you go to. Also, the little honeywell and others like it are simple spring operated units, and they work fine. Bigger valves like Cla-Val are pilot operated. Installed correctly they will hold your pressures dead nuts on what you want.
Best luck, Art

mike terry

Thanks

to all that responded.this is a bypass for a chilled water system.bypassing when modulating valve closes.just need to give the water some place to go.

Jerry Boulanger

Griswold Controls

makes a diaphragm valve up to 3" for this purpose as well. They are in Irvine, CA.