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Double Door Check Valves, Air Cushion

Summary

This valve is a safety device mounted in the pipeline or pump outlet to prevent the pump from inversed running due to the differential water hammer's shock in the pipeline when the pump stops. And it features by the brand-new structure, small fluid resistance, reliable seal, stable open-close, long duration, better energy-saving effect. Suitable for the pipeline related to the systems of water supply and drainage, fire-fighting, warming etc. or the pump outlet to prevent both pump and pipeline from being damaged due to the water hammer produced when the medium flows back and from the silencing effect.

Supplier: Saitai Valve, China
Manufacturer: Shop in Shanghai Qingpu Industrial Park

Technical Parameters

PN(MPa) 1.0 1.6  
Test pressure (MPa) Shell strength 1.5 2.4  
Sealing performance 1.1 1.76  
Working temperature =80°C    
Applicable medium Clean-water,Sea
Slow-close time 0~60
Double Door Check Valves, Air Cushion
Double Door Check Valves, Air Cushion

Materials

Name of parts Body, Disc Stem,Oil cylinder,Oil cork Spring Seat
Material Cast-iron Bowl-shape steel Bowl-shape steel,Stainless steel Stainless steel Stainless steel NBR

Dimensions

DN(mm) PN(mm) L D D1 D2 B H H1 n-fd
50 1.0/1.6 160 165 125 100 20 105 110 4-18
65 170 185 145 120 20 110 115 4-18
80 180 200 160 135 22 115 120 4-18/8-18
100 190 220 180 158 24 130 228 8-18
150 210 285 240 212 26 172 230 8-23
200 230 340 295 268 28 210 270 8-23/12-23
250 250 395/405 350/355 320 28/30 240 305 12-23/12-25
300 270 445/460 400/410 370 28/30 264 367 12-23/12-25
350 290 505/520 460/470 430 30/34 294 422 16-23/16-25
400 310 565/580 515/525 482 32/36 324 462 16-25/16-30
450 330 615/640 565/585 532 32/40 351 497 20-25/20-30
500 350 670/715 620/650 585 34/44 379 532 20-25/20-34
600 390 780/840 725/770 685 36/48 434 607 20-30/20-37
700 430 895/910 840 800 40/50 491 702 24-30/24-37
800 470 1015/1025 950 905 44/52 549 792 24-34/24-41
900 510 1115/1125 1050 1005 46/54 600 900 28-34/28-41
1000 550 1230/1255 1160/1170 1110 50/56 655 975 28-34/28-45
1200 630 1455/1485 1380/1390 1330 56/58 770 1140 32-41/32-51

Typical Installation

Typical Installation of Double Door Check Valves, Air Cushion

Double Door Check Valves, Air Cushion Related Products

Catalog:Check Valves

Above:Proportional Pressure Reducing Valves