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Pneumatic flange stop 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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Classification:

Cast steel 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 pressure PN Nominal diameter
DN(mm)
L D D₁ D₂ b  f   Z-Fd H D0
PN1.6MPa 20 150 105 75 55 14 2 4-14 300 140
25 160 115 85 65 14 2 4-14 353 160
32 180 135 100 78 15 2 4-18 390 180
40 200 145 110 85 16 2 4-18 518 200
50 230 160 125 100 16 3 4-18 555 240
65 290 180 145 120 18 3 4-18 630 280
80 310 195 160 135 20 3 8-18 683 280
100 350 215 180 155 20 3 8-18 745 320
125 400 245 210 185 22 3 8-18 855 360
150 480 280 240 210 24 3 8-23 870 400
200 600 335 295 205 26 3 12-23 954 400
250 650 405 355 320 30 3 12-23 1065 450
300 750 460 410 375 30 3 12-23 1185 500
PN2.5MPa 20 150 105 75 55 16 2 4-14 300 140
25 160 115 85 65 16 2 4-14 353 160
32 180 135 100 78 18 2 4-18 390 180
40 200 145 110 85 18 3 4-18 518 200
50 230 160 125 100 20 3 4-18 555 240
65 290 180 145 120 22 3 8-18 630 280
80 310 195 160 135 22 3 8-18 683 280
100 350 230 190 160 24 3 8-23 745 320
125 400 270 220 188 28 3 8-25 855 360
150 480 300 250 218 30 3 8-25 870 400
200 600 360 310 278 34 3 12-25 954 400
250 650 425 370 332 36 3 12-30 1065 450
300 750 485 430 390 40 4 12-30 1185 500

Note: The flange size in this table is in accordance with GB/T9113 and EN1092-1, and the structure length is in accordance with GB/T 12221.

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