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  1. olcrazy1

    SRV under rupture disk

    I know of an application that does exist where the PD is in the outlet piping of the RV. It is on a ship where the valve vents to the hull of the ship, it is an ocean ship so there is concern of sea water entering the discharge piping so they have installed a monel RD on the outlet to protect...
  2. olcrazy1

    Liquid flow through a vapor trim PSV?

    Farris Engineering 2600 Series Liquid trim valves are also due certified for liquid and vapor service. In fact Farris has had this for a while, Consolidated just released theirs.
  3. olcrazy1

    [b] Bellow Relief Valve - Cotter Pin [/b]

    I am not sure exactly what bellows pin you are talking about, most belows are either welded or screwed to the internal assembly. Which manufacturer and model valve ar eyou looking at? Without getting into detail, it is never a good idea to do anything that is not recomended by the...
  4. olcrazy1

    ASME Section VIII and Inlet Pressure Drop

    someone above said saftey valves do not modulate, this is not true, in pilot operated saftey valve does have a modulating design. And if your pressure drop is due to a long run of pipe before the valve inlet a great option is to go with a lipot valve becasue you can remote sense the inlet...
  5. olcrazy1

    how to put a PSV in service

    this is why they make change over valves to put before and after the relieve valves. if you go your method you need to have a clear process in place so that an operator dose notmake an error. Also you need to find a way to lock the ball vaves out so that no one can open or close by mistake, I...
  6. olcrazy1

    relief valve set pressure Q

    set pressure has to be at or below MAWP, it can not be greater than MAWP. Now accumulation pressure can be greater than MAWP. Just because a valve is set to pop at a given pressure doesn't mean that it is fully open at a set pressure. If a valve is set to open at 100 psig it is not fully open...
  7. olcrazy1

    Which NDT method to choose?

    it depends on the material you are talking about. Some meathods of NDT are better for certain materials. Forms of NDT could be charpy impact testing, radiograph, Liquid Pen, mag particle. It depends what material, what part and where the material is sourced, also what QC procedures a...
  8. olcrazy1

    PRV seat melted

    go with a teflon seat if your pressure is high enough to make it seal.
  9. olcrazy1

    Full nozzle or semi nozzle - pressure safety/relief valve

    Jalton, not always true that full nozzle valves are Sec.8 and Semi is Sec.1. Most Section 8 pilot valves are semi nozzle, because the pressure pick-up line with some manufactures is at th einlet so they use a semi nozzle on a pilot valve in ASME sec.8 service. Also not always true that Sec.1...

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