RE: ball valve half-open to avoid winter freezing?

Sounds risky to me to rely on an operating procedure to avoid freezing. Have you considered freeze protection? Self regulating electric tracing is available to maintain temperature below the set point. E.g. if the temperature drops below 50 degrees F, the cable will switch on and provide heat to maintain an above freezing condition. A company that manufactures this is Thermon. Do a Google search and check them out.

Richard B.

  -----Original Message-----
From: <a href="/group/PipingDesign/post?postID=lKWu4xRCnObgQY7oimbeDBDd4FvqMkqkO_aZl2VyIgpf65Fx8xfo1hAvr2xXs3rBo9993Euia_hSeJc6hQvMIEn1WNk">PipingDesign@yahoogroups.com</a> [mailto:<a href="/group/PipingDesign/post?postID=lKWu4xRCnObgQY7oimbeDBDd4FvqMkqkO_aZl2VyIgpf65Fx8xfo1hAvr2xXs3rBo9993Euia_hSeJc6hQvMIEn1WNk">PipingDesign@yahoogroups.com</a>] On Behalf Of Arturo Murillo
Sent: October 15, 2007 8:48 AM
To: <a href="/group/PipingDesign/post?postID=lKWu4xRCnObgQY7oimbeDBDd4FvqMkqkO_aZl2VyIgpf65Fx8xfo1hAvr2xXs3rBo9993Euia_hSeJc6hQvMIEn1WNk">PipingDesign@yahoogroups.com</a> Subject: Re: [PipingDesign] ball valve half-open to avoid winter freezing?

Tim

Yes, it will reduce the risk of valve cracking. Also it will be a good idea to drill a bleeding hole on the ball of the valve. (down strem side) (just as for amonia or clohrine use) .

Regards, Arturo M
Tuberias Visa , México

• Original Message ----- From: old_truculent_tim_mccoy To: PipingDesign@ <mailto:PipingDesign%40yahoogroups.com> yahoogroups.com Sent: Sunday, October 14, 2007 11:21 PM Subject: [PipingDesign] ball valve half-open to avoid winter freezing?

I'd appreciate if someone can give a quick answer to this quick question:

Say it's impractical for some reason to drain a part of a water system -- instead, water is left running to reduce the risk of freezing (this system is located in a climate where daytime winter temperatures are usually above freezing and nighttime temperatures are sometimes a few degrees below freezing). The pipes are HDPE, so an occasional freeze shouldn't be a problem. As for the ball valves: would it reduce the risk of valve cracking if I leave the ball valves half-open?

Thanks

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Received on Mon Oct 15 21:12:00 2007