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Overview of Pneumatic Centerline Butterfly Valves

Pneumatic centerline butterfly valve is a butterfly valve in which the center of rotation of the butterfly plate (ie the center of the valve shaft) is located on the centerline of the valve body and the sealing section of the butterfly plate . The connection methods are wafer type and flange type. The fluid resistance of the pneumatic midline butterfly valve is small. The effective flow area of the medium and large diameter butterfly valve is large when it is fully opened, and the opening and closing is quick and labor-saving. The opening and closing can be completed by using the compressed air to drive the disc lever to rotate 90 degrees, and it can also be equipped with an electric valve for positioning. The device adjusts and controls various parameters such as medium flow, pressure, and temperature.

Features of Pneumatic Centerline Butterfly Valve

  1. Small and light, easy to disassemble and maintain, and can be installed in any position.
  2. The structure is simple and compact, the operating torque is small, and the 90° rotation can be opened quickly.
  3. The flow characteristic is straight line, and the adjustment performance is good.
  4. The connection between the butterfly plate and the valve stem adopts a pin-free structure, which overcomes the possible internal leakage point.
  5. The outer circle of the butterfly plate adopts a spherical shape, which improves the sealing performance and prolongs the service life of the valve. It still maintains zero leakage when it is opened and closed under pressure for more than 50,000 times.

Technical Parameters of Pneumatic Centerline Butterfly Valve

Body Material: WCB, 304, 316, UPVC Disc Material : 304, 316, 316L, Nylon Plate, Aluminum Bronze, Ductile Iron Nickel-plated

Seat: NBR, EPDM, PTFE [Pressure Rating]: 1.6MPa

Nominal Diameter : DN25-DN1000

Structure: Type A, LT Lug Connection: Wafer, Flange

Solenoid Valve Voltage: AC220V/110V/380V/24V 50/60HZ DC24V/12V +10% to -10%

Temperature Range: NBR: -30~80 ℃ ; EPDM: -30~120 ℃ ; PTFE: -30~130 ℃

Pneumatic Actuator: Double-acting, single-acting Electric positioner, handwheel mechanism

Nominal diameter inch Flange GB size PN10/PN16/PN25 Actuator size
L H H1 D1 nd WeightKG A B C
DN50 2 108 245 80 125/125/125 4-18/4-18/4-18 12 217 137 111
DN65 2-1/2 112 250 90 145/145/145 4-18/4-18/8-18 13.75 258 147 122
DN80 3 114 350 98 160/160/160 4-18/8-18/8-18 16.25 258 147 122
DN100 4 127 380 112 180/180/190 8-18/8-18/8-22 twenty one 299 165 135
DN125 5 140 410 128 210/210/220 8-18/8-18/8-26 30 349 182 153
DN150 6 140 490 147 240/240/250 8-22/8-22/8-26 37 397 199 173
DN200 8 152 560 178 295/295/310 8-22/12-22/12-26 49 473 221 192
DN250 10 165 621 215 350/355/370 12-22/12-26/12-30 72 560 249 213
DN300 12 178 680 250 400/410/430 12-22/12-26/16-30 92 601 280 243
DN350 14 190 757 280 460/470/490 16-22/16-26/16-33 127.5 738 383 356
DN400 16 216 825 320 515/525/550 16-26/16-30/16-36 158 738 383 356
DN450 18 222 925 350 565/585/600 20-26/20-30/20-36 202 738 383 356
DN500 20 229 1010 380 620/650/660 20-26/20-33/20-36 251 940 434 415
DN600 24 267 1180 440 725/770/770 20-30/20-36/20-36 350 940 434 415