throttling and regulation of pressure reducing valve is by opening and closing, the medium pressure is reduced, and through the direct effect of medium pressure after valve, the valve after pressure automatically to meet the requirements of the book. Pressure reducing valve is a kind of automatic valve, in terms of institutions and the performance parameters of the universal valves have many differences, the name of some professional terms, is easy to confuse. In order to make readers more clear understanding of the pressure reducing valve, and can choose correctly, will now be the main terms of the pressure reducing valve. 1. The name of the pressure reducing valve term 1. Direct acting type pressure reducing valve: using the outlet pressure change, direct pressure reducing valve control valve disc movement. 2. Pilot operated relief valve: is composed of the main valve and pilot valve, main valve outlet pressure changes by magnifying the control action of the pressure reducing valve. 3. Diaphragm pressure reducing valve, diaphragm as sensitive element is used to drive the valve disc pressure reducing valve 4 of the movement. Piston type pressure reducing valve, piston as sensitive element is used to drive the valve disc movement. 5. Bellows type pressure reducing valve, corrugated pipe as sensitive element is used to drive the Industrial Valves disc movement. 6. Static seal: export flow is zero, pressure reducing valve sealing state. 7. Dynamic seal: export medium by the cutoff, pressure reducing valve sealing state. 8. Regulating characteristics: inlet pressure must be, continuous adjusting export pressure, pressure reducing valve, resistance and vibration phenomenon. 9. Features: pressure steady flow state, the outlet flow must, inlet pressure changes, a function of the pressure of export and import. 10. Flow feature: the steady flow state, the inlet pressure is constant, a function of pressure and flow of export. 11. Maximum flow: under a given outlet pressure, its deviation can achieve the maximum flow within the specified scope. 12. Pressure characteristic deviation: export flow must, inlet pressure, outlet pressure changes in value. Usually reducing valve Industrial Valves after pressure Pc should be less than 1/2 in front of the valve, the Pe
cast iron gate valve are required in the manufacture of almost every product and resilient valve ductile iron gate valve is one of the most common machines.
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