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  • Users: rgprasannakumar
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  1. rgprasannakumar

    Fire extinguishing system

    @ vpl: I will try to. As I'm new to the field its quite hard to get in depth details to the manufacturers.
  2. rgprasannakumar

    How does an Air Release Valve operates

    Oh Oh Oh.. Thats a huge data. And thanks for clarifying that it doesn't involve in surge. But in my project where I'm dealing with pumping system, We are having an air vessel with an air releae valve in a pump room. This pump room is at underground floor level. I doubt about its operation. My...
  3. rgprasannakumar

    How does an Air Release Valve operates

    So. Basically its operation is during when the line is filled or when it is drained. Does it have any role in handling surge? Also Where can it be located? To a highest point in system or anywhere?
  4. rgprasannakumar

    Fire extinguishing system

    All, I understand how an fire extinguishing sytem operates. But What I don't understand is while manufacturing, how the extinguishing agent be filled inside? The mechanicsm which are available in net is quite confusing and complex.. Please help
  5. rgprasannakumar

    How does an Air Release Valve operates

    All, I'm new to this valve engineering. Although I've asking to my seniors and reading many materials, I'm yet unclear about the operation of air release valve. Hope my friends will help me out. Whats it principle behind its operation?
  6. rgprasannakumar

    Unbalanced force in Doubly/Triply offset butterfly valves

    Ya. Got the point. Anyway I'm getting information for every post.
  7. rgprasannakumar

    Butterfly valve Vs Sluice valve in Fire Piping system

    Hey gerhardl: Thanks for the additional info. As you know, we are talking about the fire-fighting system with working pressure maximum of 88 Metre water of column (8.8 bar). However if at all my system undergo such high pressure, I will consider your point surely. Thanks
  8. rgprasannakumar

    Functioning of NRV

    @hydtools: Offcourse I know what an NRV is @stanier: fine. Let me see. But I doubt whether it will answer all of my questions
  9. rgprasannakumar

    Functioning of NRV

    All, How does a NRV function? How do we measure accuracy? What will be its estimated loss? Under what pressure difference it operates? Does it hold the water hammer thrust? Please throw some light in it
  10. rgprasannakumar

    Unbalanced force in Doubly/Triply offset butterfly valves

    @BCD: Assuming an 150 NB pipe with 1 mm offset, operating at 8.8 bar pressure, approximately it is exerting 13.2 Kg (130 Newton) of force. Will it sustain?
  11. rgprasannakumar

    Butterfly valve Vs Sluice valve in Fire Piping system

    That really helps a lot. Thank u!!
  12. rgprasannakumar

    Unbalanced force in Doubly/Triply offset butterfly valves

    Gotcha!!! Now I understand. Earlier I thought the longer offset section is open outward to make the fluid flow upstream. But now we need to set the valve in such a way that we need to open against the pressure.. Right?
  13. rgprasannakumar

    Butterfly valve Vs Sluice valve in Fire Piping system

    Thanks for putting some lighting on the subject. Now apart from safety part of view, maintenance is another point to be considered. How sluice valve can be maintained in-situ and why can't butterfly valve?
  14. rgprasannakumar

    Butterfly valve Vs Sluice valve in Fire Piping system

    All, Can you please explain, how in fire piping system, butterfly valve and sluice valve differs functionally? To my knowledge, both are functionally same. But some of my colleagues are saying, sluice valve are much safer than butterfly valve. Also in sluice valve we have less friction loss. For...
  15. rgprasannakumar

    Unbalanced force in Doubly/Triply offset butterfly valves

    Hi HSBCN! After reading those entire thread articles only I got this doubt.Pl clarify
  16. rgprasannakumar

    Unbalanced force in Doubly/Triply offset butterfly valves

    thread408-126483 When the valves are doubly/triply offset, I understand that the pivot and stem is offset from the centre of pipeline. In such cases, the highly pressurized fluid at one side causing unbalanced force. Wont this make the valve to open? If not, Why?

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