First, rubber stopper valve purposes:
The valve is designed to control the general corrosive medium, the body cavity surface covered with a variety of rubber to choose from, suitable for different working temperature and fluid pipe, with high strength, good corrosion resistance.
Second, rubber stopper valve material:
Body | Cast iron, ductile iron, carbon steel, stainless steel |
Butterfly plate | Cast iron, ductile iron, carbon steel, stainless steel, carbon steel fully coated rubber or fluoroplastic |
Valve stem | Carbon steel nickel-phosphorus, stainless steel |
Seat ring | Natural rubber NR, neoprene CR, nitrile rubber NBR, EPDM rubber EPDM, fluorine rubber FKM |
Handwheel | Cast iron, carbon steel |
Third, the rubber stopper valve test:
Lining: Spark
testing and inspection according to GB / T13927 standard
Nominal pressure: PN (MPa)
Body: PN × 1.5
Seal: PN × 1.1
Fourth, the main size parameters:
Nominal diameter DN | Nominal | Working | L | D | D1 | n-Φd | H1 | H2 | Do | quality |
15 | 1.6 1.0 | 1.6 1.0 | 130 | 95 | 65 | 4-14 | 213 | 232 | 100 | 4 |
20 | 150 | 105 | 75 | 4-14 | 224 | 246 | 100 | 6 | ||
25 | 160 | 115 | 85 | 4-14 | 240 | 272 | 120 | 8 | ||
32 | 180 | 140 | 100 | 4-18 | 262 | 285 | 120 | 10.5 | ||
40 | 200 | 150 | 110 | 4-18 | 283 | 310 | 140 | 16.5 | ||
50 | 2360 | 165 | 125 | 4-18 | 311 | 345 | 140 | 18. | ||
65 | 290 | 185 | 1451 | 4-18 | 366 | 410 | 160 | 26 | ||
80 | 310 | 200 | 60 | 6 / 2-18 | 388 | 430 | 200 | 36.5 | ||
100 | 350 | 220 | 180 | 6 / 2-18 | 463 | 535 | 280 | 58 | ||
125 | 400 | 250 | 210 | 6 / 2-18 | 495 | 575 | 380 | 64 | ||
150 | 480 | 285 | 240 | 6 / 2-22 | 560 | 60 | 320 | 85 | ||
200 | 495 | 340 | 295 | 6 / 2-22 | 615 | 715 | 360 | 155 | ||
250 | 622 | 405 | 355 | 10 / 2-22 | 790 | 935 | 500 | 243 | ||
300 | 698 | 460 | 410 | 10 / 2-22 | 908 | 1100 | 500 | 295 |