I. Overview 

 JD745X multifunctional pump control valve is installed in large diameter water distribution system water pump outlet to prevent water hammer and the media poured water hammer phenomenon of intelligent valve. The valve incorporating an electric valve, check valve and water hammer eliminator three functions, which can effectively improve the living quarters for the fire water and domestic water supply system in parallel with the security and reliability. Dual-chamber chamber system using the valve rapidly after stopping off in 90% (to prevent the return to the media led to pump reversal), in the slow off the remaining 10% (the elimination of destructive water hammer) reliable piston valves, high strength, is smooth, for a pump and water hammer Water hammer occasions, the main operation of the pump motor to be open and close button, the valve can open and close automatically according to the pump operating procedures, processes, pressure loss. Material of main parts are as follows: 

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


 Second, the main technical parameters 

 1, Nominal pressure: 10MPa, 1 6MPa, 2 5MPa 
 2, the minimum operating pressure: ≥ O 04MPa 
 3, the slow closing time: 3 ~ 60s (adjustable) 
 4 Suitable medium: water 
 5, the medium temperature: O ~ 80 "C 
 Three main dimensions: 


 DN LHD D1 nd 
 1.0MPa 1.6MPo 2.5MPa 1.0MPa 1.6MPa 2 5MPa 1.0MPa 
 50 203,293,165,165,165 1251251254-18 
 65 216,328,185,185,185 1451451454-18 
 80 248,364,200,200,200 1601601608-18 
 100 283,418,220,220,235 1801801908-18 
 125 330,481,250,250,270 2102102208-18 
 150 356,543,285,285,300 2402402508-22 
 200 444,673,340,340,360 2952953108-22 
 250 533,792,395,405,425 35035537012-22 
 300 600,927,445,460,485 40041043012-22 
 350 622 957 505,520,555,460,470