Pneumatic Stainless Steel Double Eccentric Butterfly Valve
This high-performance pneumatic stainless steel double eccentric butterfly valve serves as an essential automatic fluid control component for industrial pipelines. It adopts an advanced double eccentric wafer-style structure, paired with a durable pneumatic rack-and-pinion actuator. Powered by compressed air, the valve implements 90° rotary motion to complete on-off operation or continuous flow regulation for pipeline media.
The valve body and butterfly disc are precision fabricated from stainless steel, with 304 and 316 grades optional to match different working conditions. Stainless steel delivers superior corrosion and oxidation resistance, making the valve suitable for water, gas, oil, and multiple weak corrosive media. It prevents rusting and medium contamination, maintaining stable performance in long-cycle industrial operation.
The core highlight lies in its double eccentric design. Once the valve starts opening, the butterfly disc separates from the valve seat immediately. This design removes persistent friction between sealing surfaces during rotation, significantly lowering wear. It realizes tight shutoff with low leakage and extends the valve's overall service life, reducing maintenance frequency and operational costs.
The supporting pneumatic actuator offers two optional types: double-acting and single-acting (spring return). Double-acting actuators provide large torque and quick switching for common working conditions. Single-acting spring return actuators can automatically reset to preset safe positions upon air source loss, which is critical for safety interlock pipelines handling flammable or hazardous media. The actuator features fast response and smooth, stable operation, with natural explosion-proof advantages compared with electric actuators.
For automated control integration, the valve can be fitted with positioners, limit switches and solenoid valves. These accessories support real-time valve status feedback and 4-20mA proportional regulation signals. The valve can connect seamlessly with DCS and PLC systems to achieve remote automatic pipeline control.
Thanks to its compact structure, lightweight body and easy installation, this butterfly valve has broad application ranges. It is widely used in chemical industry, water treatment, power plants, papermaking, food and pharmaceutical industries, for fluid cut-off and throttling control in various industrial fluid systems.
