D641X Pneumatic Flanged Butterfly Valve

Pneumatic Flange Butterfly Valve Product Overview

The company's D641X and D643H pneumatic flange butterfly valves are composed of an angular stroke pneumatic actuator and a butterfly valve body. Their main advantages include: simple structure, compact size, light weight, and low cost, with the pneumatic flange butterfly valve particularly highlighting these features. They are suitable for installation in high-altitude or concealed pipelines and can be conveniently operated via a two-position five-way solenoid valve. When equipped with a valve positioner, they can also regulate parameters such as medium flow, temperature, and pressure. Pneumatic flange butterfly valves offer low fluid resistance, with larger effective flow areas when fully open in medium and large diameters. They enable quick and effortless opening and closing, achieved by rotating the butterfly disc 90 degrees. Since the medium forces on both sides of the rotating shaft are nearly equal, generating opposing torques, the required opening and closing torque is minimal. They provide excellent sealing under low pressure. The sealing materials for pneumatic flange butterfly valves include nitrile rubber and fluororubber, making them known as pneumatic flange soft-sealed butterfly valves. Among them, the pneumatic hard-sealed flange butterfly valve features a multi-layer metal hard seal, combining the advantages of elastic sealing and delivering superior sealing performance even under low-temperature conditions. Therefore, pneumatic flange butterfly valves are widely used in metallurgy, power, petroleum, chemical, air,