Pneumatic butterfly valve is a valve composed of a pneumatic actuator and butterfly valve. It is widely used in chemical industry, papermaking, coal mine, petroleum, medical treatment, water conservancy and other industries. Because the pneumatic actuator is installed on the butterfly valve, the pneumatic butterfly valve can adapt to some high-risk working conditions and reduce the dangers that may be caused by manual operation. Especially on low-pressure large and medium-diameter pipelines, the use of pneumatic butterfly valves is increasing. In addition, large-diameter pneumatic butterfly valves are more economical and affordable compared to other valves.
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Size Range |
Body Material |
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2"-80" DN50-DN2000 |
WCB, CF8, CF8M, CF3, CF3M, WC6, LCB etc. |
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Pressure Rating |
Disc Material |
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Class150-Class600 PN6-PN100 |
WCB, CF8, CF8M, CF3, CF3M, WC6, LCB etc. |
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End Connection |
Seat Material |
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Flange (FF, RF, RJ), wafer, lug, butt welding |
SS304 (L)+Graphite, SS316 (L)+Graphite, NBR, PTFE, EPDM, RPTFE |
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Structure Style |
Stem Material |
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Full Port, Triple Eccentric, Double Eccentric, Concentric |
17-4PH, SS410, SS304, SS316, F51, F53 |
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Actuator Options |
Design Standard |
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Pneumatic |
API 609, MSS SP-67, MSS SP-68, DIN3354, EN558, JIS B2071 |
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Temperature Range |
Face to Face Standard |
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-29℃~800℃ |
ANSI B16.10, MSS SP-68, EN558-1, JIS B2002 |
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Connection Standard |
Test Standard |
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Flange Drilling: ASME B16.5, ASME B16.47, EN1092 JIS B2220, GOST 12815 |
API598, EN12266.1, JIS B2003 |
- Working principle of pneumatic butterfly valve
Pneumatic butterfly valve is a butterfly valve equipped with a pneumatic actuator to replace manual operation. Its working principle is to use compressed air as the power source to drive the valve stem to rotate, and the valve stem drives the disc-shaped butterfly plate to rotate. The initial position of the butterfly plate is determined according to actual needs. The butterfly plate rotates from the initial position. When the butterfly plate rotates When the butterfly valve rotates to 90° with the valve body, the pneumatic butterfly valve is in a fully open state. When the butterfly valve rotates to 0° or 180° with the valve body, the pneumatic butterfly valve is in a closed state.
The pneumatic actuator of the pneumatic butterfly valve runs relatively fast and is rarely damaged due to jamming during the execution of the action. The pneumatic butterfly valve can be used as a cut-off valve, or it can be equipped with a valve positioner to realize the regulation and control of the medium in the pipeline.
- Pneumatic Operated Butterfly Valve
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