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Self-Operated Nitrogen Sealing Valve

Keywords: metering pump accessories

Classification:

Self-operated regulating valve

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  • DESCRIPTION

    Features of self-operated nitrogen sealing valve:

     The self-operated nitrogen sealing valve has the characteristics of energy saving, sensitive action, reliable operation, convenient operation and maintenance, etc., and is widely used in petroleum, chemical and other industries. The self-operated nitrogen sealing valve does not require external energy and can be adjusted using the pipeline's own pressure. It can work in no-power and gas-free situations, which is convenient, saves energy and reduces costs.

     

    Self-operated nitrogen sealing valve parameters:
     

    Technical parameters and performance

    Nominal diameter

    Dn20、25、32、40、50、65、80、100mm

     

     

    Nominal pressure

    PN1.6、4.0MPa

     

     

    Flange standard

    JB/T79.1-94, 79.2-94, etc.

     

     

    Valve body material

    Cast steel, stainless steel

     

     

    Valve body type

    Single seat (P), double seat (N), sleeve (M)

     

     

    Valve core material

    Hard seal: stainless steel

     

     

    Soft seal: stainless steel inlaid with rubber ring

     

     

    Stem material

    Stainless steel (1Cr18ni9Ti, 1Cr18Ni12MoTi)

     

     

    pressure balance

    stainless steel bellows

     

     

    Traffic characteristics

    Drive quickly

     

     

    Operating temperature

    -20-80℃ -20-350℃

     

     

     


    Working principle of self-operated nitrogen sealing valve:

     

    When the pressure in the storage tank rises to the set pressure, the quick relief valve opens quickly to release excess pressure in the tank. When the pressure in the storage tank of the micro-pressure regulating valve decreases, open the valve and fill the tank with nitrogen. Because the micro-pressure regulating valve must be used at a pressure below 0.1Mpa and the on-site pressure is high, the ZZYP pressure regulating valve must be installed to reduce the pressure to less than 0.1Mpa before it can be used. The nominal pressure is 0.1Mpa. The pressure can be set in sections, from 0.5Kpa to less than 66 Kpa. The medium temperature is ≤80℃.

    The structure of the self-operated nitrogen sealing valve is as follows:

     

    Structure and composition

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    main valve

    main valve spool

    main valve actuator

    Pressure reducing valve

    throttle valve

    Pilot spool

    testing facility

    Preset spring

    main valve

    testing facility

    spring