I. Overview 

 700X Pump Control Valve from the main valve, solenoid pilot valve, needle valve, ball valve, check valve, limit switch, micro-shaped filter and pressure gauge hydraulic control over the system. Need to stop working when the water pump, first close the main valve inlet pressure to 90%, the pump stops running. The remaining 10% from the backwater off. Prevent water hammer phenomenon. How it works: When the water pump when the valve to the downstream water supply, click here pilot valve open, needle transferred to the appropriate opening, the upstream water through valve, check valve into the main valve control room, the solenoid pilot valve outflow At this point the pressure of the main valve to maintain the main valve control room at the right opening, maintaining the normal downstream water supply. When the pump stops working, turn off the solenoid pilot valve, main valve to stop the drainage control room, control room pressure increases, the main valve begins to close. When close to 90%, the main valve for pumping the upper limit switch output signal, the pump stopped. At this point back crystal-way valve downstream into the main valve control room, control room pressure increases, the main valve is closed. This product is guided by electromagnetic valve control, no other devices and energy. Energy conservation, maintenance is simple, stop the pump stable, widely used in high-rise buildings, living areas and other water supply system and urban water supply project. Material of main parts as follows: 

 Part Name Material 
 Body, bonnet cast iron, cast steel, stainless steel 
 Bronze seat, stainless steel 
 Valve carbon steel, stainless steel + nitrile rubber 
 Stem aluminum bronze, chrome stainless steel 
 Nitrile rubber diaphragm 
 Diaphragm plate carbon steel, stainless steel 
 Stainless steel spring 


 Second, the main dimensions: 

 Nominal diameter size (mm) 
 DN (mm) L F1 H1 H 
 20150136269342 
 25160136269342 
 32180136269342 
 40200155300395 
 50203155300395 
 65216165288385 
 80241175310420 
 100,270,195,340,500 
 125,300,220,380,540 
 150,330,230,410,575 
 200,400,255,440,665 
 250,480,300,460,720 
 300,550,340,480,750 
 350,622,415,516,830 
 400,685,450,560,900 
 450,750,450,560,900 
 5,008,114,107,501,110 
 6,009,354,568,501,286