Types of conventional valve repair and their respective advantages and disadvantages for the occasion

Classification by purpose and role

    Class is mainly used for valve repair truncated truncated or connected media stream. Including the gate valve, globe valve, diaphragm valve gate, ball valves, plug valves gate, disc valves, plunger valves, ball plug valves, needle valves, and other instruments.

     Regulating valve repair classes primarily for regulating the media flow and pressure. Including regulating valves, throttle, valve doors.

     Valve repair class is used to prevent the media door back. Including valve gate structure.

     Shunt valve repair classes for the separation, distribution, or mixed media. Including the distribution of various structures such as valves and trap doors.

     Safety valve maintenance class for the safety of media overpressure protection. Including all types of safety valve.

     Classification by main parameters

     (A) classification by the pressure valve repair

     Vacuum valve working pressure is lower than standard atmospheric pressure of the valve.

     Low-pressure valve of the valve, PN is less than 1.6MPa.

     Pressure valve in the valve nominal pressure PN2.5 ~ 6.4MPa.

     PN10.0 ~ 80.0MPa pressure valve nominal pressure valve.

     High pressure valve of the valve, PN greater than 100MPa.

     (B) the classification of the medium temperature valve repair

     T high temperature valve the valve is greater than 450C.

     The temperature is less than t less than 450C 120C valve valve.

     Valve-40C ambient temperature is less than t less than the 120C of the valve.

     Cryogenic Valves-100C is less than t less than-40C of the valve.

     Cryogenic valve valve t less than-100C.

     (C) of valve repair the valve body material classification

     Non-metallic material valve: the valve, such as ceramics, glass and steel valves, plastic valves.

    Metal valves: such as copper alloy valves, aluminum valves, lead alloy valves, titanium valves, Monel valves

     Cast iron valves, carbon steel valves, cast steel valves, low-alloy steel valves, high alloy steel valves.

     Valve metal valve body lining: lining of lead, such as valves, plastic lined valves, valves lining enamel.

     General classification of valve repair

    This classification not only by the principle of division according to the structure and function, is the international, the most commonly used classification methods. General sub-valve gate, globe valves, throttle, instrument valves, piston valves, diaphragm valves gate, plug door, ball valves, butterfly doors, check the door, valve gate, safety valves, steam trap door, adjust the valve, bottom valve, filter, sewage valve