Butterfly valves
GD butterfly valves feature a mature design, advanced manufacturing processes, and highly precise equipment. They offer high reliability, safety, and a long service life. Our butterfly valves are widely used in various pipeline systems, including district heating, pharmaceutical and chemical industries, fine chemicals, petrochemicals, shipbuilding, steel plants, pressure regulating stations, power plants, and more.
The main product range includes double-offset high-performance butterfly valves and triple-offset metal-seated butterfly valves, as well as other eccentric butterfly valve designs. The double-offset high-performance butterfly valve provides excellent sealing performance, with a sealing life of more than one million open-close cycles. It features low operating torque, stable performance, and high reliability. The triple-offset metal-seated butterfly valve uses a metal-to-metal seat design. The sealing surfaces can be treated with surface hardening to improve wear resistance. For severe service conditions, STL hardfacing can be applied to further enhance wear resistance and extend the service life of the valve.
Applications
District heating, pharmaceutical and chemical plants, fine chemical plants, petrochemical plants, shipyards, steel plants, power plants, and other industrial applications.
Technical Parameters
Nominal pressure: PN10/16/25/40/63 Class150/300/600/900
Nominal diameter:
Bidirectional sealing: DN50-DN1600 (NPS2-NPS64)
Unidirectional sealing: DN50–DN2000 (NPS2–NPS80)
Standards & Specifications: API, ASME, GB, EN, DIN
Product Range
Double-offset High-Performance Butterfly Valves
- End Connections: Flanged, Lug, Wafer
- Drive type: Lever, Gearbox, Electric, Pneumatic, etc.
- Sealing Materials: PTFE, RPTFE, PPL
- Body Materials: WCB, CF8, CF8M, CF3M, Duplex Stainless Steels such as 4A and 6A, Aluminum Bronze C95800, etc.
Triple-Offset Metal-Seated Butterfly Valves
- End Connections: Butt-Weld, Flanged, Lug, Wafer
- Actuation: Gearbox, Electric, Pneumatic, Hydraulic, etc.
- Sealing Materials: F304/F316L + H60, F304/F316L + STL, etc.
- Body Materials: A105, Q345, WCB, CF8, CF8M, CF3M, Duplex and Super Duplex Stainless Steels such as 4A and 6A, Aluminum Bronze C95800, etc.
Advantages of GD Butterfly Valves
Precision Manufacturing
With more than 320 CNC machine tools, including CNC turning and grinding machines, machining centers, imported 5-axis machining centers, and dedicated CNC lathes, as well as over 200 high-efficiency specialized machining machines, we have comprehensive machining capabilities.
Our company is also equipped with more than 30 sets of physical and chemical testing, non-destructive testing, and imported coordinate measuring equipment, providing comprehensive manufacturing and inspection capabilities to ensure the high quality and precision of every valve.
Advanced and Reliable Structure
Double-offset high-performance butterfly valves feature sealing components made from high-quality imported materials, ensuring stable and reliable sealing performance. Our specially designed sealing structure provides excellent elasticity and resilience.
Triple-offset butterfly valves feature a fully metal-seated, metal-to-metal sealing design. For severe service conditions, the sealing surfaces can be hardfaced with stainless steel + Stellite to provide enhanced wear and erosion resistance. This design ensures stable sealing performance under high-temperature, low-temperature, and high-pressure conditions. For certain applications, our bi-directional sealing design is also available, providing 1:1 sealing with zero leakage in both flow directions.
Wide Range of Service Conditions
Suitable for a wide range of demanding industrial medium, including high-temperature steam, hot oil, flue gas, pulverized coal, coking processes, metallurgy, power generation, petrochemicals, LNG, district heating networks, particle-laden wastewater, and highly corrosive chemical media.
Our butterfly valves are designed to handle a variety of severe service conditions, including vacuum, high pressure, high temperature, low temperature, and media containing solid particles.
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