Wafer Check Valve 

 Structure and size 

 The valve from the valve body, valve, springs and other components, horizontal or vertical installation in the piping system to prevent the media back, with the structure of short, small size, light weight; valve valve quickly, the water hammer pressure is small; flow smooth, fluid resistance; movement sensitive, good sealing performance. 

 Main technical parameters 

 DN model test pressure temperature 
 Suitable temperature 

 Enclosure with 
 H71H-16Q 1.6 2.4 1.76 ≤ 235 ℃ 
 Water, steam, oil, etc. 

 H71H-25Q 2.5 3.75 2.75 ≤ 235 ℃ 

 H71W-25H ≤ 300 ℃ 

 H71W-25P ≤ 200 ℃ 
 Nitric acid and other corrosive media 

 H71W-40H 4.0 6.0 4.4 ≤ 300 ℃ 

 H71W-40P ≤ 200 ℃ 
 Water, steam 


 Major parts material type valve disc spring 
 H71H-16Q H71H-25Q QT400-15 25 50CrVA 
 H71W-25H H71W-40H 2Cr13 1Cr13 1Cr18Ni9 
 H71W-25P H71W-40P ZG1Cr18Ni9Ti 1Cr18Ni9Ti 1Cr18Ni9Ti 
 The main dimensions nominal diameter DN LD LD 
 1.6 2.5 4.0 1.6 2.5 4.0 
 15 25 4,848,488,071,140,140,140 
 20 31.5 58 58 5,810,080,160,165,165 
 25 35.5 68 6,868,125,110,190,195,195 
 32 40 8,080,870,150,125,215,225 225 
 4,045,909,090,200,160,270 285 390 
 5,056,105,105,105,250,200 330 340 350 
 6,563,125,125,125,300,250 385 400 415 
 Flange Dimensions: iron valve by GB4216.4 (5) -84 standard steel valves by GB/T9113.1-2