The pneumatic flanged butterfly valve belongs to a specific kind of pneumatic butterfly valve. Its valve body features flanges at both ends. These flanges are fastened to pipe flanges using bolts. This design endows it with excellent sealing performance and high pressure - bearing capacity. As a result, it finds extensive applications in industrial pipeline systems where medium - to - high pressure, large pipe diameters, or stringent sealing requirements are present.
Core Features
Flange Connection :The valve body has standard flanges (such as GB, ANSI, DIN, etc.) at both ends. It is connected to the pipe flanges through bolts, and sealing gaskets (rubber, metal wound gaskets) ensure the tightness of the interface. Advantages: It is suitable for high - pressure (PN16–PN40) and large - diameter (DN50–DN2000) scenarios. It is resistant to vibration and loosening, and is easy to disassemble and maintain.
Pneumatic Actuator: It is equipped with a single - acting (spring return) or double - acting (two - way pneumatic control) cylinder, which has a large output torque and can drive the valve plate to rotate from 0° to 90°. An intelligent positioner (such as with IP67 protection level) can be optionally configured, supporting 4–20mA signals or bus communication (PROFIBUS, HART) to achieve precise opening adjustment.
Sealing Design
Soft Sealing: The valve seats are made of EPDM or NBR rubber, which are suitable for normal - temperature (-20~120°C) and non - corrosive media (water, air, oils). The leakage level reaches Class VI (zero leakage).
Hard Sealing: It uses stainless steel + graphite surfacing or metal - to - metal sealing, which can withstand high temperatures (≤425°C), high pressures and particulate media (such as steam, dust).
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