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other practical uses for a Thermal Expansion Tank

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  • other practical uses for a Thermal Expansion Tank

    I ran across this video when researching expansion tanks. Too good not to share.

    In the spirit of serious plumbing, I would have used a gate valve instead of the ball valve to throttle the flow.

    http://www.shutup-n-ride.com/Drain-B...6/mov01048.mpg

  • #2
    Re: other practical uses for a Thermal Expansion Tank

    A gate valve isn't designed for throttling.
    Buy cheap, buy twice.

    Comment


    • #3
      Re: other practical uses for a Thermal Expansion Tank

      you would want a globe valve sir...

      Comment


      • #4
        Re: other practical uses for a Thermal Expansion Tank

        Originally posted by plumbworker View Post
        you would want a globe valve sir...
        Ah, thanks ... good to learn the right answer for this application.

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        • #5
          Re: other practical uses for a Thermal Expansion Tank

          globe valves are only legal for a single fixture use. not anything serving more than 1 fixture.

          a ball valve is the correct valve for throttling. a ball valve is also full port if you buy the proper ball valves and a globe valve is not.

          throttling with a globe valve can be a problem as in the case of angle stops. the washer is typically not screwed in and will either come off or vibrate if not opened wide enough.

          rick.
          phoebe it is

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          • #6
            Re: other practical uses for a Thermal Expansion Tank

            Throttling for a ball valve, though it can and is done, really isn't the best valve for that application. Throttling wears down the balls.(that's what she said)
            Buy cheap, buy twice.

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            • #7
              Re: other practical uses for a Thermal Expansion Tank

              Ball valves should never be used for throttling. The change in direction of the laminar flow through the valve wears out not only the ball but the valve body also. In practical applications there is usually no need to "gang" throttle a bunch of fixtures or a properly sized branch line.
              sigpic

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              • #8
                Re: other practical uses for a Thermal Expansion Tank

                I use a tank like that for a homade enema kit.

                Sorry, no video.

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                • #9
                  Re: other practical uses for a Thermal Expansion Tank

                  I have seen smelt fishers use a tank like that to launch the weight for their net.
                  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


                  • #10
                    Re: other practical uses for a Thermal Expansion Tank

                    Originally posted by NHMaster3015 View Post
                    Ball valves should never be used for throttling. The change in direction of the laminar flow through the valve wears out not only the ball but the valve body also. In practical applications there is usually no need to "gang" throttle a bunch of fixtures or a properly sized branch line.
                    please explain why a balancing valve is a ball valve?

                    on hot water return lines we have ball valves with a locking handle that you dial in and tighten to the level of flow you set.

                    if not a ball valve, what valve is preferred for throttling?

                    sure above 4'' we can use butterfly valves, but those tend to be wide open and always have a butterfly in the path of flow.

                    os&y valves and nrs valves should never be throttled.

                    rick.
                    phoebe it is

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                    • #11
                      Re: other practical uses for a Thermal Expansion Tank

                      OK when I build a "Tommy Gun" version of this should I build a hydrostatic pump into the gun or just use street pressure?

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                      • #12
                        Re: other practical uses for a Thermal Expansion Tank

                        who knows. but this i've done. i don't use propane in my "tatter" gun. i use acetylene. i'd tell you to be careful, but if you were you wouldn't do this. have fun. breid

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                        • #13
                          Re: other practical uses for a Thermal Expansion Tank

                          tommy gun. take the ball valve cut the stop off. attach a small wheel to it. just spin wheel. breid

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                          • #14
                            Re: other practical uses for a Thermal Expansion Tank

                            Originally posted by NHMaster3015 View Post
                            Ball valves should never be used for throttling. The change in direction of the laminar flow through the valve wears out not only the ball but the valve body also. In practical applications there is usually no need to "gang" throttle a bunch of fixtures or a properly sized branch line.
                            You beat Me to that summation, Sir , It was on the YIP OF MY YOUNG
                            I can build anything You want , if you draw a picture of it , on the back of a big enough check .

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                            • #15
                              Re: other practical uses for a Thermal Expansion Tank

                              The only true throttling valve is a needle valve. All other ones are not "Listed" to do "Throttling" or control flow, There are balancing valves that use a "Ball" type valve to balance the systems flow. Also "Flow" control valves are used in shower installations that are globe. Butterfly valves won't shut off after a short run of controlling flow or throttling as it wears off the sealing edges of the butterfly and valve body.

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