JLH versatile three-in check valve 
 Check Valve Model: JLH 
 Performance 
 First, a valve can be successfully completed three functions: 1, water hammer check valve 2, valve 3, the balance valve. Second, even turn the pump stops, the spring force the valve closed first, and thus prevent water hammer. Third, by regulating the opening, you can adjust the pump output. Fourth, with indicator, you can use the eye to confirm the valve opening. Fifth, nitrile rubber gasket for the production, and thus will not leak, can absorb momentum. Sixth, the spring is made of stainless steel, due to a strong corrosion resistance. Seven water saving equipment and materials and costs, reduced installation space. Eight, the higher into the streamlined shape and structure, and thus the pressure drop is very small. Nine, the role played next to the road, so the export side of the pipe with a recovery of water features, and a vacuum in the inlet side, the added water. Ten, horizontal pipe, vertical pipe can be installed. 
 Structure and working principle: 
 JLH versatile three-in check valve installed in the general construction, apartments and factories for drainage, heating water, and boiler condensate is small, the secondary pump outlet on the water supply pipe, to prevent the flash caused by the pump to stop operation medium inside the tubes back. 
 Main technical parameters 
 To ATO-2001 ATO-2002 
 Suitable for media water and oil 
 Apply the greatest pressure 10kg/cm2 20kg/cm2 
 Suitable for temperatures up to 80oC 
 Allowable leakage 0 
 Size DN50-DN800 
 Standard flange connection flange standard 20kg/cm2 10kg/cm2 
 Valve cover material cast steel 
 Steel seat 
 NBR seals 
 Cast steel valve identified 
 Stainless steel spring 
 Main external mounting dimensions 
 DN installation valve length L (mm) tube and flange screw diameter (mm) opening height H (mm) bolt hole center distance (mm) diameter bolt holes were re-kg 50 flange 
 230 160 2101254-1816 
 65,290,180,250,145 4-18 24 
 80,310,195,290,160 8-18 35 
 100,350,215,320,180 8-18 50 
 125,400,245,380,210 8-18 72 
 150,480,280,420,240 8-18 98 
 200,533,335,500,295 12-23 150 
 250,622,405,580,355 12-25 230 
 300,698,460,730,410 12-25 390 
 350,787,520,830,470 16-25 500 
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