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Renew 2" Crane Gate Valve

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  • Renew 2" Crane Gate Valve

    Hi,

    I have to renew or replace many (20 to 30) 2" to 4" Crane Gate Valve I want to know if their is some tool to renew the angle seat for this type of valve ?
    If I have to replace all valves it's a mess because they have some isolation neoprene and aluminium cover on it.

    Thanks

    Daniel

  • #2
    Re: Renew 2" Crane Gate Valve

    i would think a mild acid/ lime away and a die grinder/ dremel will clean up the tapered seat that the gate closes upon.

    i think the bigger challenge will be to remove the valve bonnets without damaging the valve bodies.

    are the valves used for domestic potable water or are they for process piping

    where are you located

    rick.
    phoebe it is

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    • #3
      Re: Renew 2" Crane Gate Valve

      Rick the first thing that i thought of was is he going to get them apart
      i never had luck doing it but it was on mostly heat lines
      Charlie

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

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      • #4
        Re: Renew 2" Crane Gate Valve

        What figure number (catalog or model number), pressure class (125, 250, 300), bonnet style(union, flanged, etc), and what is the body material?

        Most 2" and under gate valves do not have replaceable seats, and to lap the seat or grind a new seat would change the dimensions face to face and the existing or a new gate would not seal properly. Most times it is more cost effective to replace in kind. If the gate is screwed in line then you will have some extra work if no allowance was made during construction for maintenance of this type. That's the first place a designer or client looks to shave cost on a project. They save same money today at the expense of higher maintenance costs and increased downtime in the future. Good value engineering principles were not applied or ignored.
        Last edited by Bob D.; 12-02-2010, 06:29 AM. Reason: added comment
        "When we build let us think we build forever. Let it not be for present delight nor for present use alone. Let it be such work that our descendants will thank us for, and let us think, as we lay stone upon stone, that a time is to come when these stones will be held sacred because our hands have touched them, and that men will say, as they look upon the labor and wrought substance of them, "See! This our fathers did for us."
        John Ruskin (1819 - 1900)

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