Product Description
Pneumatic butterfly valves are a type of flow control valve used to regulate or block the flow of a fluid (usually a gas or liquid) within a pipeline. They are called "butterfly" valves because of the butterfly-like motion of the valve disc when it opens and closes. These valves are particularly popular for their quick, quarter-turn operation and the ability to control flow with precision.
Here are some key features and components of pneumatic butterfly valves:
1. Valve Disc: The central component of a butterfly valve is the disc, which is a flat, circular plate with a rod passing through it. This disc is positioned in the center of the pipeline and can be rotated 90 degrees to control the flow.
2. Actuator: Pneumatic butterfly valves are equipped with pneumatic actuators. These actuators use compressed air to open or close the valve, making them well-suited for automation and remote control.
3. Body: The valve body holds the disc and actuator in place and is typically made of metal, such as cast iron, stainless steel, or aluminum. It can be constructed in various configurations, including lug-style, wafer-style, and flanged.
4. Sealing Mechanism: The valve disc is usually lined with a soft sealing material, such as EPDM, PTFE, or a combination of materials. This ensures a tight seal when the valve is closed to prevent leakage.
5. Handle or Operator: In addition to the pneumatic actuator, some butterfly valves have a manual operator (a lever or handwheel) for use during maintenance or in emergencies.
Advantages of pneumatic butterfly valves include:
1. Quick operation: They can be opened or closed rapidly, making them suitable for applications that require fast response times.
2. Compact design: Butterfly valves are generally more compact than other valve types, saving space in pipelines.
3. Low maintenance: They have fewer moving parts, reducing the need for maintenance.
4. Cost-effective: Butterfly valves are often more affordable than other valve types.
Applications for pneumatic butterfly valves are diverse and include industries like HVAC, water treatment, chemical processing, food and beverage, and more. They are typically used for on/off control or throttling applications in systems where moderate to high flow rates are encountered.
It's important to choose the right type of butterfly valve based on your specific application requirements, such as pressure, temperature, flow rate, and the type of fluid being handled. Proper sizing and maintenance are essential for ensuring these valves perform efficiently and safely.
Pneumatic Butterfly Valves Specifications:
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Size Range
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2-1/2"WAFER
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Disc Materials
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(SS 316)
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Stem Materials
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SS 410
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Pressure Class
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PN16
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Body Materials
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WCB (Cast Steel)
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Temperature
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-5 to 120 degree centigrade
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End Connection
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WAFER - API 609 (CAT - A)
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Standard
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API 609, BS 5155, ISO 5211, API 598
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Seat Materials
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EPDM
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Applications
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High Pressure, HVAC
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Actuator Size
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50 MM
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Actuator Body
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Hard Anodized Aluminum
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Mounting Standard
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ISO 5211
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Torque Min & Max
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Min. 16 NM @ 3 bar to Max. 38 NM @ 7 Bar
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Movement
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Rotary - 90 Degree
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Features
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ANSI B16.5 150#, BS10 Table E, Table F, Table H, Flange Accommodation.
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