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Process Operation Technology

Oil, gas and petrochemical process industries


    INTRODUCTION TO VALVES

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    Talib Al_Munawri
    Director-General
    Director-General

    Posts : 337
    Join date : 2009-07-03
    Age : 30
    Location : Sultanate of Oman

    INTRODUCTION TO VALVES

    Post by Talib Al_Munawri on Thu Sep 17, 2009 8:53 pm

    INTRODUCTION TO VALVES


    A valve is a device installed in a piping system which controls the
    flow of a gas or liquid. Valves have an opening through which gas
    or fluid can flow. They can close off (isolate) the piping system
    to stop the flow and they can control the amount of flow.



    Processing systems handle different products at different pressures
    and temperatures. So, there are many different types of valves
    A valves shape and material depends upon the product and its
    operating pressure and temperature. Valves carry the same rating
    system for pressure as flanges; i.e. 150-300-600 etc.



    In a gas plant or refinery, valves will be made from the following
    materials:


    These are used for process fluids

    Stainless steel.
    Carbon steel.
    Cast iron.


    These are used for utilities / fire water

    Brass.
    Bronze


    These are used for air / chemical lines.

    Plastic


      Current date/time is Sun Oct 22, 2017 2:10 am