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National standard vertical check valve

National standard vertical check valve

Vertical check valve refers to the valve that automatically opens and closes the valve flap by relying on the flow of the medium itself to prevent the backflow of the medium, also known as check valve, one-way valve, reverse flow valve, and back pressure.
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Product Parameter

Main external dimensions and connection dimensions:

National standard (GB) PN1.6MPa
DN L D D1 D2 b Z-фd
15 85 95 65 45 14 4-ф14
20 95 105 75 55 14 4-ф14
25 105 115 85 65 14 4-ф14
32 150 135 100 78 16 4-ф18
40 160 145 110 85 16 4-ф18
50 170 160 125 100 16 4-ф18
65 180 180 145 120 18 4-ф18
80 200 195 160 135 20 8-ф18
100 210 215 180 155 20 8-ф18
125 275 245 210 185 22 8-ф18
150 300 280 240 210 24 8-ф23
200 380 335 295 265 26 12-ф23
250 400 405 355 320 30 12-ф25
300 420 460 410 375 30 12-ф25
350 450 520 470 435 34 16-ф25
National standard (GB) PN2.5MPa
DN L D D1 D2 b Z-фd
15 85 95 65 45 16 4-ф14
20 95 105 75 55 16 4-ф14
25 105 115 85 65 16 4-ф14
32 150 135 100 78 16 4-ф18
40 160 145 110 85 18 4-ф18
50 170 160 125 100 20 4-ф18
65 180 180 145 120 22 4-ф18
80 200 195 160 135 22 8-ф18
100 210 230 190 160 24 8-ф23
125 275 275 220 188 28 8-ф25
150 300 300 250 218 30 8-ф25
200 380 360 310 278 34 12-ф25
250 400 425 370 332 36 12-ф30
300 420 485 430 390 40 16-ф30
350 450 550 490 448 44 16-ф34
400 480 610 550 505 48 16-ф34
450 550 660 600 555 50 20-ф34
500 600 730 660 610 52 20-ф41
National standard (GB) PN4.0MPa
DN L D D1 D2 b Z-фd
15 85 95 65 45 16 4-ф14
20 95 105 75 55 16 4-ф14
25 105 115 85 65 16 4-ф14
32 150 135 100 78 16 4-ф18
40 160 145 110 88 18 4-ф18
50 170 160 125 100 20 4-ф18
65 180 180 145 120 22 4-ф18
80 200 195 160 135 22 8-ф18
100 210 230 190 160 24 8-ф23
125 275 275 220 188 28 8-ф25
150 300 300 250 218 30 8-ф25
200 380 375 320 282 38 12-ф30
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