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: <a href="/group/PipingDesign/post?postID=TB-sFraHm9jH-DLEQKmDyukCGRss4bOkmyr-e8MoWQSAjz-Dc4aLeQ2p5LrZxMXrVc5zQ6uSG03qXQ9VavEyOtST_PeF">PipingDesign@yahoogroups.com</a>
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
[Non-text portions of this message have been removed]
Received on Mon Oct 15 10:48:00 2007