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Bear “Customer initially, High quality first” in mind, we do the job closely with our customers and supply them with efficient and skilled providers for China DIN Valve, Lift Check Valve, We will supply much better merchandise with diversified designs and experienced services. We sincerely welcome friends from over the world to visit our company and cooperate with us on the basis of long-term and mutual benefits.
Product use
National standard lift check valve is applicable to nominal pressure PN1 6-16.0mpa, working temperature of – 46 ~ 550 ℃ on pipelines in petroleum, chemical industry, pharmaceutical, chemical fertilizer, power industry and other working conditions to prevent medium backflow.
Product features
1. The product has reasonable structure, reliable sealing, excellent performance and beautiful appearance;
2. The sealing surface of valve disc and valve seat is overlaid with Co based cemented carbide, which has good wear resistance, corrosion resistance, scratch resistance and long service life;
3. Part materials and flange and gasket dimensions can be reasonably selected according to actual working conditions or user requirements to meet various engineering needs.
Main performance specifications
Design criteria | GB/T 12235 | |||||
Pressure temperature class | GB/T 12224 | |||||
Structure length | GB/T 12221 | |||||
Flange type and size | GB/T 9113、JB/T 79、EN1092、ASME B16.5/B 16.47 | |||||
Inspection and test | JB/T 9092、GB/T13927、API598 | |||||
Test pressure(MPa) | Nominal pressure | PN1.6 | PN2.5 | PN4.0 | PN6.4 | PN10.0 |
Shell test | 2.4 | 3.8 | 6.0 | 9.6 |
15.0 |
|
High pressure seal | 1.8 | 2.8 | 4.4 | 7.1 | 11.0 | |
Low pressure seal | 0.6 |
Material of main parts
No. | Part name | carbon steel | stainless steel | Alloy steel | Low temperature steel |
1 | valve body | WCB | CF8 | WC6 | LCB |
2 | Valve disc | WCB/25 | CF8/F304 | WC6/F11 | LCB/LF2 |
3 | shim | Flexible graphite | Flexible graphite | Flexible graphite | Flexible graphite |
4 | Valve cover | WCB | CF8 | WC6 | LCB |
5 | Double end stud | 35CrMoA | 0Cr18Ni9(304) | 25Cr2MoVA | 35CrMoVA |
6 | Nut | 45# | 0Cr18Ni9(304) | 35CrMoA | 45# |
7 | Spring | 60Si2Mn | 0Cr18Ni9(304) | 0Cr18Ni9(304) | 0Cr18Ni9(304) |
Main overall connection dimensions
DN(mm) | L | D | D1 | D2 | b-f | Z- d | H | WT(kg) |
15 | 130 | 95 | 65 | 45 | 16-2 | 4- 14 | 77 | 3 |
20 | 150 | 105 | 75 | 58 | 18-2 | 4- 14 | 77 | 4 |
25 | 160 | 115 | 85 | 68 | 18-2 | 4- 14 | 80 | 5 |
32 | 180 | 140 | 100 | 78 | 18-2 | 4- 18 | 85 | 7 |
40 | 200 | 150 | 110 | 88 | 18-3 | 4- 18 | 95 | 9 |
50 | 230 | 165 | 125 | 102 | 18-3 | 4- 18 | 105 | 10 |
65 | 290 | 185 | 145 | 122 | 18-3 | 8- 18 | 120 | 20 |
80 | 310 | 200 | 160 | 138 | 20-3 | 8- 18 | 130 | 30 |
100 | 350 | 220 | 180 | 158 | 20-3 | 8- 18 | 140 | 39 |
125 | 400 | 250 | 210 | 188 | 22-3 | 8- 18 | 155 | 50 |
150 | 480 | 285 | 240 | 212 | 22-3 | 8- 22 | 180 | 70 |
200 | 600 | 340 | 295 | 268 | 24-3 | 12 22 | 215 | 161 |
250 | 730 | 405 | 355 | 320 | 26-3 | 12- 26 | 260 | 251 |
300 | 850 | 460 | 410 | 378 | 28-4 | 12- 26 | 315 | 395 |
Main overall connection dimensions
DN(mm) | L | D | D1 | D2 | b-f | Z- d | H | WT(kg) |
15 | 130 | 95 | 65 | 45 | 16-2 | 4- 14 | 100 | 3.4 |
20 | 150 | 105 | 75 | 58 | 18-2 | 4- 14 | 105 | 5 |
25 | 160 | 115 | 85 | 68 | 18-2 | 4- 14 | 120 | 5.7 |
32 | 180 | 140 | 100 | 78 | 18-2 | 4- 18 | 130 | 9.1 |
40 | 200 | 150 | 110 | 88 | 18-3 | 4- 18 | 135 | 11.8 |
50 | 230 | 165 | 125 | 102 | 20-3 | 4- 18 | 149 | 14.4 |
65 | 290 | 185 | 145 | 122 | 22-3 | 8- 18 | 160 | 23 |
80 | 310 | 200 | 160 | 138 | 24-3 | 8- 18 | 169 | 30 |
100 | 350 | 235 | 190 | 162 | 24-3 | 8- 18 | 194 | 44 |
125 | 400 | 270 | 220 | 188 | 26-3 | 8- 18 | 222 | 65 |
150 | 480 | 300 | 250 | 218 | 28-3 | 8- 22 | 255 | 99 |
200 | 600 | 360 | 310 | 278 | 30-3 | 12- 22 | 305 | 190 |
250 | 730 | 425 | 370 | 335 | 32-3 | 12- 26 | 355 | 315 |
300 | 850 | 485 | 430 | 395 | 34-4 | 12- 26 | 410 | 450 |