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  • Flow control valve stuck closed??

    It seems most times flo control valves get stuck open and then you have the zone too hot due to runaway heat. I am wondering if mine is stuck closed cause the radiant heat in that zone never reaches temperature (70 degrees) and thus the cirulator is always running. The other 4 zones upstairs with baseboards are working fine, pressure is at about 17lb. and boiler temp is at 180 degrees.

    It seems that the hot water pipe going into this flow control valve is hot but the pipe out of it is not. I am very worried to try to open it manually since the valve is original 1961? If in fact its stuck closed, if I try to bleed this zone, would nothing come out of the purge valve located on the return since the flow control valve is closed?? Any input is greatly appreciated!!

  • #2
    Re: Flow control valve stuck closed??

    there may be a little thumb knob on the top of it ,there is also a packing nut ,loosen the nut a little then turn the the knob on top it will open the flow valve .
    this is not a fix it will just get you heat for now but i should be replaced . the check part is is frozen
    Charlie

    My seek the peek fundraiser page
    http://observatory.mountwashington.o...nal&fr_id=1040


    http://www.mountwashington.org/weather/conditions.php

    new work pictures 12/09
    http://public.fotki.com/hvachawk/

    Comment


    • #3
      Re: Flow control valve stuck closed??

      Agree with HVAC. dont be afraid, just get it to open a little and plan for replacement.

      Comment


      • #4
        Re: Flow control valve stuck closed??

        If it was truly stuck closed or nearly closed, wouldn't any attempt to bleed the zone cause very little to come out of the purge valve since the water wouldn't go thru the flo control valve?

        Comment


        • #5
          Re: Flow control valve stuck closed??

          yes all you will be doing is draining that zone until it gets air locked ,it is just like shutting of a valve
          Charlie

          My seek the peek fundraiser page
          http://observatory.mountwashington.o...nal&fr_id=1040


          http://www.mountwashington.org/weather/conditions.php

          new work pictures 12/09
          http://public.fotki.com/hvachawk/

          Comment


          • #6
            Re: Flow control valve stuck closed??

            I tried opening the flo- control valve manually and the thing would not budge... I even loosed and even removed the packing nut, and still nothing. Gee.... its only 50 years old.

            So I removed the Bell and Gossett 100 pump to inspect the impeller for my cause of no heat in that zone: Well, that was it. The metal impeller was totally shot. Just a follow-up for all my pals in cyberland...

            Comment


            • #7
              Re: Flow control valve stuck closed??

              Here are a few pics of the steel impeller I pulled out of that old Bell And Gossett pump. Based on the date code on the bearing assembly, it is from August 1961, which makes sense since the building was built in 1961. Who knows how long that zone had poor heat because this a rental and just got a complaint of poor heat a few weeks ago. As of today, I have 4 of 6 zones running Taco 007 circulators. I rather not think about all those loose pieces of rusted impller debris floating around my system.

              Pictures by greekguy7 - Photobucket

              Comment


              • #8
                Re: Flow control valve stuck closed??

                wow what an old looking system ,time for an up grade
                Charlie

                My seek the peek fundraiser page
                http://observatory.mountwashington.o...nal&fr_id=1040


                http://www.mountwashington.org/weather/conditions.php

                new work pictures 12/09
                http://public.fotki.com/hvachawk/

                Comment

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