DZ40Y low-temperature flange gate valve is suitable for low-temperature media such as methane,liquid natural gas,hexene,carbon dioxide,liquid ammonia,liquid oxygen,liquid nitrogen,liquid hydrogen,etc.
characteristic
1.To prevent abnormal pressure rise in the middle chamber,a pressure relief hole is installed on the inlet side of the gate plate
2.Determine the top length of the valve cover based on the operating temperature of the valve to ensure reliable sealing of the valve stem packing
3.Reasonably select materials for fillers,gaskets,and other parts based on the working temperature
4.Strictly control the chemical composition and mechanical performance indicators such as low-temperature impact toughness of materials
5.Adopting multiple piping flange standards and sealing surface types,suitable for various engineering needs
Low temperature gate valve execution standard
design and manufacturing | Structure length | Flange size | Pressure Temperature | Experiment Inspection |
JB/T7749 | GB12221 | JB79 | Gb9131 | JB/T9092 |
Low temperature gate valve pressure test
nominal pressure PN | 1.6 | 2.5 | 4.0 | 6.4 | 10.0 |
strength test | 2.4 | 3.8 | 6.0 | 9.6 | 15.0 |
Water seal test | 1.8 | 2.8 | 4.4 | 7.0 | 11.0 |
Back Seal test | 1.8 | 2.8 | 4.4 | 7.0 | 11.0 |
Airtight seal test | 0.4-0.7 |
Main component materials and performance of low-temperature gate valve
Body cover plate | valve stem | Sealing surface | shim | filler | operation temperature | Applicable Medium |
ZGoCrMNVAILow temperature and high pressure cast steel | 1Cr7Ni12 | STL/STL | 1Cr13/flexible graphite | PTFE impregnated polytetrafluoroethylene | -46 | Propane/Bingene |
LCB | ||||||
ZGoCrMNVAI Low temperature and high pressure cast steel | -60 | |||||
LC1 | ||||||
ZGoCrMNVAI Low temperature and high pressure cast steel | -73 | |||||
LC2 | ||||||
ZGoCrMNVAI Low temperature and high pressure cast steel | 1Cr18Ni9Ti | -101 | ||||
LC3 | ||||||
ZGoCrMNVAI Low temperature and high pressure cast steel | -115 | |||||
LC4 | ||||||
ZGoCrMNVAI Low temperature and high pressure cast steel | -196 |
Main external dimensions of low-temperature gate valve
PN1.6MPa-2.5 MPa
1.6MPa | DN | L | D | D1 | D2 | b | n-Φd | H | D0 |
Convex method | 20 | 150 | 105 | 75 | 55 | 14 | 4-Φ14 | 320 | 140 |
25 | 160 | 115 | 85 | 65 | 14 | 4-Φ14 | 350 | 160 | |
32 | 180 | 135 | 100 | 78 | 16 | 4-Φ18 | 385 | 180 | |
40 | 200 | 145 | 110 | 85 | 16 | 4-Φ18 | 420 | 220 | |
50 | 250 | 160 | 125 | 100 | 16 | 4-Φ18 | 540 | 240 | |
65 | 265 | 180 | 145 | 120 | 18 | 4-Φ18 | 610 | 240 | |
80 | 280 | 195 | 160 | 135 | 20 | 8-Φ18 | 690 | 280 | |
100 | 300 | 215 | 180 | 155 | 20 | 8-Φ18 | 780 | 300 | |
125 | 325 | 245 | 210 | 185 | 22 | 8-Φ18 | 930 | 320 | |
150 | 350 | 280 | 240 | 210 | 24 | 8-Φ23 | 980 | 350 | |
200 | 400 | 335 | 295 | 265 | 26 | 12-Φ26 | 1180 | 400 | |
250 | 450 | 105 | 355 | 320 | 30 | 12-Φ30 | 1390 | 450 | |
300 | 500 | 460 | 410 | 375 | 30 | 12-Φ30 | 1620 | 500 | |
350 | 550 | 520 | 470 | 435 | 34 | 16-Φ34 | 1810 | 500 | |
400 | 600 | 580 | 525 | 485 | 36 | 16-Φ36 | 1970 | 550 | |
2.5MPa | 20 | 150 | 105 | 75 | 55 | 16 | 4-Φ16 | 320 | 140 |
Convex method | 25 | 160 | 115 | 85 | 65 | 16 | 4-Φ16 | 350 | 160 |
32 | 180 | 135 | 100 | 78 | 18 | 4-Φ18 | 385 | 180 | |
40 | 200 | 145 | 110 | 85 | 18 | 4-Φ18 | 420 | 200 | |
50 | 250 | 160 | 125 | 100 | 20 | 4-Φ20 | 540 | 240 | |
65 | 265 | 180 | 145 | 125 | 22 | 8-Φ22 | 510 | 240 | |
80 | 280 | 195 | 160 | 135 | 22 | 8-Φ22 | 690 | 280 | |
100 | 300 | 230 | 190 | 160 | 24 | 8-Φ24 | 780 | 300 | |
125 | 325 | 270 | 220 | 188 | 28 | 8-Φ28 | 930 | 300 | |
150 | 350 | 300 | 250 | 218 | 30 | 8-Φ30 | 980 | 320 | |
200 | 400 | 360 | 310 | 278 | 34 | 12-Φ34 | 1180 | 360 | |
250 | 450 | 425 | 370 | 332 | 36 | 12-Φ36 | 1390 | 400 | |
300 | 500 | 485 | 430 | 390 | 40 | 16-Φ40 | 1620 | 450 | |
350 | 550 | 550 | 490 | 448 | 44 | 16-Φ44 | 1810 | 500 | |
400 | 600 | 610 | 550 | 505 | 48 | 16-Φ48 | 1990 | 560 |
PN4.0MPa-10.0MPa
4.0 MPa | DN | L | D | D1 | D2 | D6 | b | n-Φd | H | D0 |
Concave method MFM | 20 | 150 | 105 | 75 | 55 | 51 | 16 | 4-Φ14 | 330 | 140 |
25 | 160 | 115 | 85 | 65 | 58 | 16 | 4-Φ14 | 360 | 160 | |
32 | 180 | 135 | 100 | 78 | 66 | 18 | 4-Φ18 | 440 | 180 | |
40 | 200 | 145 | 110 | 85 | 76 | 18 | 4-Φ18 | 455 | 200 | |
50 | 250 | 160 | 125 | 100 | 88 | 20 | 4-Φ18 | 575 | 240 | |
65 | 380 | 180 | 145 | 120 | 110 | 22 | 4-Φ20 | 635 | 240 | |
80 | 3103 | 195 | 160 | 135 | 121 | 22 | 8-Φ22 | 715 | 280 | |
100 | 50 | 230 | 190 | 160 | 150 | 24 | 8-Φ22 | 815 | 300 | |
125 | 400 | 270 | 220 | 188 | 176 | 28 | 8-Φ24 | 965 | 360 | |
150 | 450 | 300 | 250 | 218 | 204 | 30 | 8-Φ28 | 1025 | 400 | |
200 | 550 | 375 | 320 | 282 | 160 | 38 | 8-Φ30 | 1225 | 450 | |
250 | 650 | 445 | 385 | 345 | 313 | 42 | 12-Φ34 | 1440 | 560 | |
300 | 750 | 510 | 450 | 408 | 364 | 46 | 16-Φ34 | 1665 | 5470 | |
350 | 850 | 570 | 510 | 465 | 422 | 52 | 16-Φ41 | 1880 | 720 | |
400 | 950 | 655 | 585 | 535 | 474 | 58 | 16-Φ18 | 2050 | 800 | |
6.4MPa | 20 | 190 | 125 | 90 | 68 | 51 | 20 | 4-Φ18 | 330 | 180 |
Concave method MFM | 25 | 210 | 135 | 100 | 78 | 58 | 22 | 4-Φ23 | 360 | 180 |
32 | 230 | 150 | 110 | 82 | 66 | 24 | 4-Φ23 | 410 | 180 | |
40 | 240 | 165 | 125 | 95 | 76 | 24 | 4-Φ23 | 480 | 220 | |
50 | 250 | 175 | 135 | 105 | 88 | 26 | 4-Φ23 | 585 | 240 | |
65 | 280 | 200 | 160 | 130 | 110 | 28 | 8-Φ23 | 690 | 240 | |
80 | 310 | 210 | 170 | 140 | 121 | 30 | 8-Φ23 | 745 | 280 | |
100 | 350 | 250 | 200 | 168 | 150 | 32 | 8-Φ25 | 885 | 300 | |
125 | 400 | 295 | 240 | 202 | 176 | 36 | 8-Φ30 | 985 | 360 | |
150 | 450 | 340 | 280 | 240 | 204 | 38 | 8-Φ34 | 1050 | 400 | |
200 | 550 | 405 | 345 | 300 | 260 | 44 | 12-Φ34 | 1240 | 450 | |
250 | 650 | 470 | 400 | 352 | 313 | 48 | 12-Φ41 | 1460 | 560 | |
300 | 750 | 530 | 160 | 412 | 364 | 54 | 16-Φ41 | 1670 | 5640 | |
10.0MPa | 25 | 210 | 135 | 100 | 78 | 58 | 24 | 4-Φ18 | 365 | 200 |
Concave method | 32 | 230 | 150 | 110 | 82 | 66 | 24 | 4-Φ23 | 420 | 200 |
50 | 250 | 195 | 145 | 112 | 88 | 28 | 4-Φ25 | 630 | 240 | |
65 | 280 | 220 | 170 | 138 | 110 | 32 | 8-Φ25 | 700 | 240 | |
80 | 310 | 230 | 180 | 148 | 121 | 34 | 8-Φ25 | 760 | 280 | |
100 | 350 | 265 | 210 | 172 | 150 | 38 | 8-Φ30 | 900 | 280 |
Tel: 15351513006
Landline: 0515-89118577
Fax: 0515-8911 8000
Email: jtongcn 126.com
Address: Oubei Pump and Valve Industrial Park, Binhai Economic Development Zone, Jiangsu Province
15351513006