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Leading Manufacturer for Parallel Slide Gate Valve - M60A vacuum breaking valve – Convista

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Leading Manufacturer for Parallel Slide Gate Valve - M60A vacuum breaking valve – Convista Detail:


Specifications

Type: nuclear power vacuum breaking valve

Model: JNDX100-150P 150Lb

Nominal Diameter: DN 100-250

Applied to condenser system of a nuclear power station, it has negative pressure suction, positive pressure exhaust and liquid leakage prevention functions

.1.The vacuum breaking valve, an automatic valve, requires no additional drive when it is put into operation. At normal working state, the joint force of spring and medium exerted on valve disc presses the valve disc towards the valve seat to make the sealing surface cling and seal; when medium pressure drops to specified vacuum value (i.e. negative pressure up to setting pressure), spring is compressed, valve disc leaves valve seat, external air enters and system pressure boosts; when system pressure rises to working value, the spring pulls the valve disc towards the valve seat and sealing surface clings again to return to normal working state.

2.With its upper part guiding rod guided by the guiding seat, the float ball goes up when seawater level in the valve body cavity rises and the guiding rod seals the ventilation aperture in the guiding seat to prevent seawater leakage.

3.Function I negative pressure suction: when pressure of the vacuum system drops to set vacuum, thrust exerted at upper part of the valve disc is bigger than pre-tightening force from the spring and the valve disc opens rapidly to introduce external air into the valve body through air inlet of the valve seat and enter the vacuum system to boost pressure of the vacuum system gradually. When spring pre-tightening force is greater than thrust exerted at upper part of the valve disc, the valve disc blows back rapidly and external gas cannot enter the valve body. In this case, pressure of the vacuum system recovers to its normal value.

4.Function II positive pressure exhaust: when pressure value of the vacuum system is bigger than pressure of external air, connecting aperture of the guiding seat can discharge pressure in the valve body to external environment slowly to prevent excessive overpressure of the vacuum system from damaging the system equipment.

5.Function III liquid leakage prevention: in case of liquid in the vacuum system, when level raises gradually and contacts the float ball in the valve body, the float ball will rise with increasing level and guiding rod at upper part of the float ball will rise gradually to seal the connecting pore in the guiding seat to prevent liquid leakage in the system.


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We always continually provide you with the most conscientious customer service, and the widest variety of designs and styles with finest materials. These efforts include the availability of customized designs with speed and dispatch for Leading Manufacturer for Parallel Slide Gate Valve - M60A vacuum breaking valve – Convista, The product will supply to all over the world, such as: Argentina, Hamburg, Tanzania, We welcome customers from all over the world come to discuss business. We supply high quality products, reasonable prices and good services. We hope to sincerely build business relationships with customers from at home and abroad, jointly striving for a resplendent tomorrow.
  • The supplier abide the theory of "quality the basic, trust the first and management the advanced" so that they can ensure a reliable product quality and stable customers.
    5 Stars By Lesley from Madras - 2018.12.28 15:18
    Cooperate with you every time is very successful, very happy. Hope that we can have more cooperation!
    5 Stars By Quintina from Singapore - 2018.05.22 12:13

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