Article View: sci.electronics
Article #20451Re: Finding an electrically-controlled valve?
From: Knudsen
Date: Wed, 18 Jan 1989 18:48
Date: Wed, 18 Jan 1989 18:48
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In article <2936@kitty.UUCP>, larry@kitty.UUCP (Larry Lippman) writes: > The key to effective > control in this arrangement is to have a mixing chamber (can be just a coiled > length of tubing) to mix the hot and cold water BEFORE the output temperature > is measured. You also should equip air chambers (like on old steam fire engines) to filter out the puslations on both sides of the pulsed valves. Otherwise the water ahmmer effects may be terrific. If you hit the resonant frequency of your house plumbing, your sump pump better be in good shape. -- Mike Knudsen Bell Labs(AT&T) att!ihlpl!knudsen "Lawyers are like nuclear bombs and PClones. Nobody likes them, but the other guy's got one, so I better get one too."
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arc1-ca.pugleaf.net!utzoo!attcan!uunet!ncrlnk!ncrcae!hubcap!gatech!cwjcc!tut.cis.ohio-state.edu!osu-cis!att!ihlpl!knudsenReferences:
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!ncrlnk!ncrcae!hubcap!gatech!cwjcc!tut.cis.ohio-state.edu!osu-cis!att!ihlpl!knudsen From: knudsen@ihlpl.ATT.COM (Knudsen) Newsgroups: sci.electronics Subject: Re: Finding an electrically-controlled valve? Summary: Need pulsation chamber! Message-ID: <8514@ihlpl.ATT.COM> Date: 18 Jan 89 18:48:01 GMT References: <1404@accelerator.eng.ohio-state.edu> <2925@kitty.UUCP> <2936@kitty.UUCP> Organization: AT&T Bell Laboratories - Naperville, Illinois Lines: 15