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  • Why valves fail

    how many different types of valve failure can you name.

    - half-closed/throttling (gate valve)

    - wire draw

    - wrong pressure rating

    - wrong application

    - improper installation

    - vandalism

    that's all i can think of.

    Vince
    Last edited by Vince the Plumber; 05-28-2009, 02:11 PM.

  • #2
    Re: Why valves fail

    We have valves too ( circuit breakers). They trip (fail) from over voltage (shorts). But we can reset 'em.

    Comment


    • #3
      Re: Why valves fail

      mineral deposits that build up in the valve,

      Corrosion

      stupidity, (putting a pipe wrench on it and turning it the wrong way),

      and Freezing is another winner,
      Push sticks/blocks Save Fingers
      ~~~~~~~~~~~~~~~~~~~
      "The true measure of a man is how he treats someone who can do him absolutely no good."
      attributed to Samuel Johnson
      ~~~~~~~~~~~~~~~~~~~
      PUBLIC NOTICE: Due to recent budget cuts, the rising cost of electricity, gas, and oil...plus the current state of the economy............the light at the end of the tunnel, has been turned off.

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      • #4
        Re: Why valves fail

        I get the strangest looks when I tell people to exercise their gate valves.

        Comment


        • #5
          Re: Why valves fail

          The acid in the $hit plants, eats em' no matter what there made from, also abrasion from grit in high pressure applications just destroys valves and direction changes.

          Comment


          • #6
            Re: Why valves fail

            Cavitation.

            J.C.

            Comment


            • #7
              Re: Why valves fail

              Gate valve packing nut leaks, for years, corroded to kingdom come!

              Comment


              • #8
                Re: Why valves fail

                Originally posted by killavolt View Post
                We have valves too ( circuit breakers). They trip (fail) from over voltage (shorts). But we can reset 'em.
                Long ago, before nuvistors and transistors, before the IC, 'valves' in electrical service were made of glass and also known as tubes.
                ---------------
                Light is faster than sound. That's why some people seem really bright until you hear them speak.
                ---------------
                “If I had my life to live over again, I'd be a plumber.” - Albert Einstein
                ---------
                "Its a table saw.... Do you know where your fingers are?"
                ---------
                sigpic http://www.helmetstohardhats.com/

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                • #9
                  Re: Why valves fail

                  anybody know what the electrical equivalent is to a check valve?

                  Vince

                  Comment


                  • #10
                    Re: Why valves fail

                    Diode?

                    Comment


                    • #11
                      Re: Why valves fail

                      Yep a diode. I do miss working in electronics. I used to work in electrnics back in the day when the 7400 seres ships where commen place in the world.
                      Last edited by SewerRatz; 05-29-2009, 10:01 AM.
                      Ron Hasil Lic #058-160417
                      A-Archer Sewer & Plumbing specializing in:
                      Tankless Water Heaters | Drain and Sewer Cleaning
                      Sump and Ejector Pumps | Backflow RPZ Testing

                      Comment


                      • #12
                        Re: Why valves fail

                        The deterioration of rubber in a valve can cause it to break down. Same with electrolysis if it is connected to an improper material. Thats all i can think of right now. Feel free to correct me if I'm wrong.

                        Comment


                        • #13
                          Re: Why valves fail

                          How about those smart guys that put gate valves in parking garages with the handle pointing downward so it will be easy to turn on and off. What they did not plan on was all the sediment that collects in the housing so the first time you shut it off the stem snaps with the gate in the closed position.

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