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Brief Introduction
The D641H pneumatic flange hard seal butterfly valve adopts a three eccentric hard seal structure design. After strict calculation, the "" - shaped sealing ring has al no friction with the butterfly plate, solving the problem of traditional eccentric butterfly valves still having sliding friction on the sealing surface at the moment of opening and closing from 0 to 10 degrees. It achieves the effect of separation of the sealing surface of the butterfly plate at the moment of opening and closing, and sealing at the moment of closing contact, achieving the goal of extending service life and sealing performance.
The sealing surface of the butterfly plate is made of welded cobalt based hard alloy, which is wear-resistant. The large-sized butterfly plate adopts a spinning frame mechanism, which has the characteristics of high strength, large overcurrent area, and low flow resistance. Its mechanism is unique, and the "switch" can be completed by simply rotating the valve stem 90 degrees. Therefore, hard sealed butterfly valves are widely used in pipelines for corrosive media such as metallurgy, electricity, petroleum, chemical, air, gas, combustible gases, and water supply and drainage with medium temperatures ≤ 425 ℃, as the good device for regulating flow and cutting off fluids. The product complies with the national GBTT13927-92 valve pressure test standard.
Technical Parameter
Pneumatic actuator optional feature | Double-acting, single-acting |
Pneumatic actuators are available in a variety of models | AT series, AW series |
Solenoid valve voltage | AC110V,AC220V,AC24V,DC24V |
Compressed air pressure | 2bar-8bar |
Nominal diameter | DN50mm~DN1200mm |
Nominal pressure | PN1.0MPa-PN2.5MPa |
Applicable temperature | -30~+425℃ |
Connection | Flanged type |
Body material | Carbon steel, stainless steel |
Disc material | Carbon steel, stainless steel, alloy steel, etc |
Seat lining | Tungsten carbide, tungsten carbide, nickel alloy, graphite composite, PTFE |
Applicable media | Water, steam, oil, weak corrosive media, etc |
Main Dimension Table
DN (mm) |
1.0 | 1.6 | ||||||||
L | H | D | D1 | n-φd | H | L | D | D1 | n-φd | |
50 | 43 | 85 | 125 | 100 | 4-φ18 | 43 | 85 | 125 | 100 | 4-φ18 |
65 | 46 | 95 | 145 | 120 | 4-φ18 | 46 | 95 | 145 | 120 | 4-φ18 |
80 | 49 | 110 | 160 | 135 | 4-φ18 | 64 | 110 | 160 | 135 | 8-φ18 |
100 | 56 | 122 | 180 | 155 | 8-φ18 | 64 | 122 | 180 | 155 | 8-φ18 |
125 | 64 | 138 | 210 | 185 | 8-φ18 | 70 | 138 | 210 | 185 | 8-φ18 |
150 | 70 | 158 | 240 | 210 | 8-φ22 | 76 | 158 | 240 | 210 | 8-φ22 |
200 | 71 | 188 | 295 | 265 | 8-φ22 | 89 | 188 | 295 | 265 | 12-φ22 |
250 | 76 | 224 | 350 | 320 | 12-φ22 | 114 | 224 | 350 | 320 | 12-φ26 |
300 | 83 | 254 | 400 | 368 | 12-φ22 | 114 | 254 | 400 | 368 | 12-φ26 |
350 | 92 | 288 | 460 | 428 | 16-φ22 | 127 | 288 | 460 | 428 | 16-φ26 |
400 | 102 | 320 | 515 | 482 | 16-φ26 | 140 | 320 | 515 | 482 | 16-φ30 |
450 | 114 | 350 | 565 | 532 | 20-φ26 | 152 | 350 | 565 | 532 | 20-φ30 |
500 | 127 | 388 | 620 | 585 | 20-φ26 | 152 | 388 | 620 | 585 | 20-φ33 |
600 | 154 | 440 | 725 | 685 | 20-φ30 | 178 | 440 | 725 | 685 | 20-φ36 |
700 | 165 | 488 | 840 | 800 | 24-φ30 | 229 | 488 | 840 | 800 | 24-φ30 |
800 | 190 | 572 | 950 | 905 | 24-Φ33 | 241 | 572 | 950 | 905 | 24-φ39 |
900 | 203 | 628 | 1050 | 1005 | 28-φ33 | 241 | 628 | 1050 | 1005 | 28-φ39 |
1000 | 216 | 698 | 1160 | 1115 | 28-φ36 | 300 | 698 | 1160 | 1115 | 28-φ42 |
1200 | 254 | 810 | 1380 | 1325 | 32-φ39 | 360 | 810 | 1380 | 1325 | 32-φ48 |