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CN | EN

Stainless steel butterfly check valve

Technical Parameters

Product model: H76H/W
Nominal diameter: DN50~1200mm
Nominal pressure: PN1.0~4.0MPa
Working temperature: -29°C~200°C
Applicable medium: water, steam, oil, nitric acid, acetic acid

Product Details

Product overview
The stainless steel butterfly check valve is composed of valve body, disc, stem and spring and other parts, and adopts a clamp connection. Due to the short closing stroke of the disc and its spring-loaded, water hammer phenomenon is significantly reduced. It is mainly suitable for water supply and drainage pipe networks of urban, industrial and high-rise buildings. Its structural length is shorter than that of general check valves, which is suitable for occasions with installation space restrictions. The opening and closing parts are opened or closed by the flow and force of the medium to prevent the media from flowing back.

Product features
1. Stainless steel butterfly check valve, small water hammer pressure, short disc stroke, and spring-assisted closing, fast closing speed. The structure length is very short, small size and light weight, which brings great convenience to the installation, handling, storage and pipeline layout of the valve, and can save a lot of materials and reduce costs.
2. The fluid resistance of the valve is small, and with the increase of the valve diameter, the fluid force coefficient decreases. Can be installed horizontally or vertically. Lightweight and unnecessary support for the valve. The opening pressure is very small, and the disc can be fully opened with a small pressure difference. The valve is integral structure, simple and compact, and has high reliability.


Main external dimensions

pressure caliber size（mm） weight（kg）

Piping flange (for reference)

NPS DN L D D3 D2 Bolt hole center circle
diameterD1 		Number of bolts Bolt diameter d bolt lengthL1
in mm RF RJ
Class 150
PN2.0MPa 		2 50 60 103 56 51 2 120.5 4 5/8 M16 140 155
3/2 65 67 122 73 65 3 139.5 4 5/8 M16 150 165
3 80 73 135 88 80 4 152.5 4 5/8 M16 160 175
4 100 73 173 108 102 6 190.5 8 5/8 M16 170 185
5 125 86 195 132 127 8 216.0 8 3/4 M20 190 205
6 150 98 220 160 152 13 241.5 8 3/4 M20 205 220
8 200 127 277 210 203 25 298.5 8 3/4 M20 240 255
10 250 146 337 266 254 39 362.0 12 7/8 M24 270 285
12 300 181 407 310 305 54 432.0 12 7/8 M24 310 325
14 350 184 448 355 350 80 476.0 12 1 M27 325 340
16 400 191 512 405 400 117 540.0 16 1 M27 340 355
18 450 203 547 455 450 138 578.0 16 11/8 M30 365 380
20 500 219 604 505 500 163 635.0 20 11/8 M30 385 400
24 600 222 715 605 600 331 749.5 20 11/4 M33 405 420
28 700 305 773 700 700 380 795.5 40 3/4 M20 455 -
30 750 305 824 750 746 425 846.0 44 3/4 M20 455 -
32 800 305 878 800 796 560 900.0 48 3/4 M20 460 -
36 900 368 983 910 898 640 1009.5 44 7/8 M24 540 -
42 1050 432 1142 1055 1050 960 1171.5 48 1 M27 625 -
48 1200 524 1302 1205 1200 1400 1335.0 44 11/8 M30 740 -
Class 300
PN5.0MPa 		2 50 60 110 58 51 3 127.0 8 5/8 M16 155 175
3/2 65 67 128 73 65 4 149.0 8 3/4 M20 175 195
3 80 73 147 88 80 6 168.5 8 3/4 M20 190 210
4 100 73 179 108 102 8 200.0 8 3/4 M20 195 215
5 125 86 214 132 127 15 235.0 8 3/4 M20 215 235
6 150 98 249 160 152 18 270.0 12 3/4 M20 230 250
8 200 127 305 210 203 31 330.0 12 7/8 M24 280 300
10 250 146 359 266 254 51 387.5 16 1 M27 315 335
12 300 181 420 310 305 77 451.0 16 11/8 M30 365 385
14 350 222 483 355 350 117 514.5 20 11/8 M30 410 430
16 400 232 537 405 400 190 571.5 20 11/4 M33 435 455
18 450 264 594 455 450 200 628.5 24 11/4 M33 475 535
20 500 292 652 505 500 265 686.0 24 1 1/4 M33 510 585
24 600 318 772 608 600 410 813.0 24 11/2 M39 560 -
30 750 368 882 740 735 660 921.0 36 13/8 M36 650 -
36 900 483 1044 880 873 1020 1089.0 32 15/8 M42 800 -
42 1050 568 1196 1045 1035 1540 1244.5 36 13/4 M45 920 -
48 1200 629 1365 1190 1179 2260 1416.0 40 17/8 M48 1010 -

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