Pneumatic Triple Eccentric Butterfly Valve
The pneumatic large-diameter triple-eccentric butterfly valve is a high-performance valve engineered for applications involving large diameters, high temperatures, and high pressure differentials. Featuring a triple-eccentric sealing design, it ensures that the valve seat and the disc make no frictional contact during opening and closing; this minimizes wear on the sealing surfaces and extends the valve's service life. Equipped with a pneumatic actuator, it enables rapid opening and closing as well as remote automatic control, making it an ideal choice for flow isolation and regulation in large-diameter piping systems.
Manufacturing Range
Nominal Diameter: DN200–DN2600
Nominal Pressure: PN1.0–PN4.0 MPa
Applicable Temperature: -29 to +550°C
Valve Body Material: WCB, 304, 316L, CF8M, etc.
Sealing Type: Metal-to-metal (hard) seal / Composite seal
Actuator: Pneumatic (double-acting/single-acting)
Design Features
Triple-eccentric design: The butterfly plate’s axis of rotation is offset from both the sealing surface and the valve stem axis—a triple-eccentric configuration. This ensures the sealing surfaces disengage the moment the valve begins to open, resulting in zero friction, low operating torque, and an extended service life.
Metal-to-metal hard sealing: Utilizes multi-layered metal sealing rings or stainless steel/graphite composite seals, offering excellent resistance to high temperatures, high pressures, and erosion.
Large-diameter design: Available in sizes up to DN2600 and beyond, meeting the requirements of large-scale pipeline projects.
Bi-directional sealing: Provides reliable sealing in both forward and reverse flow directions, with no restrictions on flow orientation.
Pneumatic actuation: Equipped with pneumatic actuators (available in single-acting or double-acting configurations) for rapid opening and closing; can be integrated with solenoid valves and limit switches to enable automated control.
Design Standards
Design and Manufacture：API 609,JB/T 8527
Face to Face Dimension：GB/T12221-2005
Flange Connection Dimension：GB9113-2000,JB、HG、SH、BS、DIN、JIS
Test and Inspection：API 598