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Characteristics Of Pneumatic Butterfly Valve
Dec 03, 2018

Characteristics of pneumatic butterfly valve


Summary of Pneumatic Butterfly Valve:

Pneumatic butterfly valve is fixed between two pipe flanges by bolts at both ends. It is generally used in places with narrow space or short pipelines. Pneumatic butterfly valve uses compressed air to operate the opening and closing of butterfly valve. According to the action form, it can be divided into single action and double action. The single action has the function of spring reset, which can automatically reset to the initial state when the gas source is lost to avoid accidents. Pneumatic butterfly valves are usually installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc butterfly plate rotates around the axis, and the rotation angle is between 0 - 90. When the rotation angle is between 0 and 90 the valve is fully open.


Pneumatic butterfly valve features:

Pneumatic butterfly valve is simple in structure, small in volume and light in weight. It consists of only a few parts. The valve can be switched on and off quickly only by rotating 90 degrees. The operation is simple and the valve has good fluid control characteristics. When the butterfly valve is in full open position, the butterfly plate thickness is the resistance of the medium flowing through the valve body, so the pressure drop generated by the valve is very small, so it has better flow control characteristics. Pneumatic butterfly valve has elastic seal and metal seal. Elastic sealing valve, sealing ring can be inlaid on the body or attached to the butterfly plate.



Principle of pneumatic butterfly valve actuator:

Dual function: ventilation opening, ventilation closing, air source failure to maintain the current position

Single-acting air-opening mode: ventilation opening, air-breaking closing, air source failure closing

Single-acting gas shut-off: ventilation shut-off, air source failure open



Optional accessories: reversing solenoid valve, limit switch, air filter pressure relief valve, electrical positioner, handwheel mechanism, retaining valve


Electrical parts can be selected explosion-proof


DN

inch

GB SIZE(mm)PN10/PN16

Actuator size

L

D1

D2

H1

H2

n-Φd

A

B

C

50

2

42

52.6

125

142

80

4-16

163

96

76

65

2 1/2

45

64.4

145

155

89

4-16

195

115

91

80

3

45

78.9

160

161

95

8-16

195

115

91

100

4

52

104.1

180

180

114

8-16

217

137

11

125

5

55

123.4

210

193

127

8-16

258

147

122

150

6

55

155.9

240

205

139

8-20

299

165

136

200

8

60

202.8

295

250

175

8-20/12-20

349

182

153

250

10

66

250.8

350/355

282

203

12-20/12-24

397

199

173

300

12

76

301.9

400/410

326

242

12-20/12-24

473

221

192

350

14

76

334

460/470

358

267

16-20/16-24

560

249

213

400

16

86

390

515/525

380

301

16-24/16-27

601

280

243

450

18

105

441

565/585

422

381

20-24/20-27

738

383

356

500

20

130

492

620/650

479

387

20-24/20-30

738

383

356

600

24

151

593

725/770

562

457

20-27/20-33

940

434

415


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