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Fakai Valve Factory Site: Yongxing Industrial Zone, Longwan District, Wenzhou City Tel: 0577-88767789
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H77H / W Wafer single flap butterfly check valve

H77H / W Wafer Single Flap Butterfly Check Valve Structure
H77H / W Wafer Single Flap Butterfly Check Valve Structure

Scope of application

H77H / W Wafer single flap butterfly check valve is used for pure pipelines and industrial, environmental protection, water treatment, high-rise building water supply and drainage pipelines to prevent the medium from flowing backward. The check valve adopts a wafer type, the butterfly plate is two semicircles, and the spring is forcibly reset. The sealing surface can be a body surfacing wear-resistant material or rubber-lined, which has a wide range of use and reliable sealing.

Structural features

1. The structure length is short, and the structure length is only 1/4 to 1/8 of the traditional flange check valve;
2. Small size and light weight, its weight is only 1/4 ~ 1/20 of traditional flange check valve;
3. The valve flap closes quickly and the water hammer pressure is small;
4. Both horizontal and vertical pipes can be used, which is easy to install;
5.The flow channel is unobstructed and the fluid resistance is small;
6, sensitive action, good sealing performance;
7. The valve flap has a short stroke and a small impact force when closing the valve;
8, the overall structure, simple and compact, beautiful appearance;
9. Long service life and high reliability.

Performance parameter

Nominal pressure PN1.0MPa, PN1.6MPa, PN2.5MPa, PN4.0MPa, PN6.4MPa, PN10.0MPa
model H77H-C H77W-P H77W-P8 H77W-P3 H77W-R H77W-R8 H77W-R3
Material of main parts Valve body WCB (A105) ZG1Cr18Ni9Ti CF8 (304) CF8 (304L) ZG1Cr18Ni12Mo2Ti CF8M (316) CF3M (316L)
Disc CF8 CF8 CF8 CF3 CF8M CF8M CF3M
Valve shaft 2Cr13 1Cr18Ni9Ti 0Cr18Ni9 00Cr19Ni10 1Cr18Ni12Mo2Ti 0Cr17Ni12Mo2 00Cr17Ni14Mo2
spring 0Cr18Ni9 0Cr18Ni9 0Cr18Ni9 00Cr19Ni10 0Cr17Ni12Mo2 0Cr17Ni12Mo2 00Cr17Ni14Mo2
Be applicable

Working condition
Applicable medium water,
steam,
Oil products, etc.
Corrosive media such as nitric acid Strongly oxidizing medium Corrosive media such as acetic acid Corrosive media such as urea
Applicable temperature (℃) -29 ~ 425 -196 ~ 540 -196 ~ 425 -196 ~ 540 -196 ~ 455

Dimension table

Pressure level caliber Size (mm) Weight (kg) Piping flange (for reference)
NPS DN L D D 3 D 2 Bolt hole center circle diameter D 1 Number of bolts Bolt diameter d Bolt length L 1
in mm RF RJ
Class 150
PN2.0MPa
2 50 60 103 56 51 2 120.5 4 5/8 M16 140 155
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 1 1/8 M30 365 380
20 500 219 604 505 500 163 635.0 20 1 1/8 M30 385 400
twenty four 600 222 715 605 600 331 749.5 20 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 1 1/8 M30 740 -
Class 300
PN5.0MPa
2 50 60 110 58 51 3 127.0 8 5/8 M16 155 175
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 1 1/8 M30 365 385
14 350 222 483 355 350 117 514.5 20 1 1/8 M30 410 430
16 400 232 537 405 400 190 571.5 20 M33 435 455
18 450 264 594 455 450 200 628.5 twenty four M33 475 535
20 500 292 652 505 500 265 686.0 twenty four M33 510 585
twenty four 600 318 772 608 600 410 813.0 twenty four M39 560 -
30 750 368 882 740 735 660 921.0 36 1 3/8 M36 650 -
36 900 483 1044 880 873 1020 1089.0 32 1 5/8 M42 800 -
42 1050 568 1196 1045 1035 1540 1244.5 36 1 3/4 M45 920 -
48 1200 629 1365 1190 1179 2260 1416.0 40 1 7/8 M48 1010 -