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  • 气动法兰式中线蝶阀1.jpg
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Pneumatic flanged center line butterfly valve

A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category.

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Ductile iron valve series

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Description


A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category. The valve may be operated manually or with a hand wheel, handle or pedal, and may also be controlled to vary the pressure, temperature and flow rate of the fluid medium. The valve can perform continuous or repeated operations on these changes, such as safety valves installed in hot water systems or steam boilers. In more complex control systems, automatic control valves are used as required by external inputs (I. e., to adjust the changing set point of the flow through the pipeline). The automatic control valve does not need to be manually operated according to its input and setting, so that the valve can accurately control the various requirements of the fluid medium. Valves can also be divided into cast iron valves, cast steel valves, stainless steel valves, chromium molybdenum steel valves, chromium molybdenum vanadium steel valves, dual phase steel valves, plastic valves, non-standard customized valve materials, etc.

◆ Main outline connection dimension

Nominal diameter DN(mm) L H H0 A B 0.6MPa 1.0MPa 1.6MPa
D D1 D2 Z-Fd D D1 D2 Z-Fd D D1 D2 Z-Fd
50 108 82.5 338 180 65 140 110 88 4-14 165 125 99 4-19 165 125 99 4-19
65 112 92.5 358 180 65 160 130 108 4-14 185 145 118 4-19 185 145 118 4-19
80 114 100 413 245 72 190 150 124 4-19 200 160 132 8-19 200 160 132 8-19
100 127 110 428 240 72 210 170 144 4-19 220 180 156 8-19 220 180 156 8-19
125 140 125 444 240 72 240 200 174 8-19 250 210 184 8-19 250 210 184 8-19
150 140 142.5 553 350 93 265 225 199 8-19 285 240 211 8-23 285 240 211 8-23
200 152 170 678 350 93 320 280 254 8-19 340 295 266 8-23 340 295 266 12-23
250 165 197.5 742 550 350 375 335 309 12-19 395 350 319 12-23 405 355 319 12-28
300 178 222.5 803 600 350 440 395 363 12-23 445 400 370 12-23 460 410 370 12-28
350 190 252.5 866 600 350 490 445 413 12-23 505 460 429 16-23 520 470 429 16-28
400 216 282.5 940 600 350 540 495 463 16-23 565 515 480 16-28 580 525 480 16-31
450 222 307.5 995 750 380 595 550 518 16-23 615 565 530 20-28 640 585 548 20-31
500 229 335 1058 750 380 645 600 568 20-23 670 620 582 20-28 715 650 609 20-34
600 267 390 1163 750 380 755 705 667 20-26 780 725 682 20-31 840 770 720 20-37
700 430 447.5 1283 750 380 860 810 772 24-26 895 840 794 24-31 910 840 794 24-37
800 470 507.5 1398 750 380 975 920 878 24-31 1015 950 901 24-34 1025 950 901 24-40
900 510 557.5 1498 1250 380 1075 1020 978 24-31 1115 1050 1001 28-34 1125 1050 1001 28-40
1000 550 615 1608 1500 580 1175 1120 1078 28-31 1230 1160 1112 28-37 1255 1170 1112 28-43
1200 630 727.5 1876 1500 580 1405 1340 1295 32-34 1455 1380 1328 32-40 1485 1390 1328 32-49

Note: The flange size in this table is in accordance with GB/T17241.6 standard, and the structure length is in accordance with GB/T12221-2005 standard. The products can be produced according to ISO5211 international standards.

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