Founded in 2010 and headquartered in Anfeng Industrial Zone, Yongjia, Zhejiang, SUNAY has three manufacturing subsidiaries with a registered capital of 10.8 million RMB. Our products—including API 6D pipeline ball valves, gate, globe, check, plug valves, and API 609 butterfly valves- offer complete fluid control solutions for petrochemical, LNG, nuclear, marine, aerospace, and other industries.
Comprehensive Product Range
We offer 6 major valve types with 1,000+ specifications, including patented high-temperature, high-pressure, and particle-resistant valves.
Advanced Technology
Equipped with CAD design, 3D simulation, and professional testing platforms for continuous product optimization.
Strict Quality Management
International-standard production, ERP and SAP systems, and precision casting ensure reliable, standardized manufacturing.
Certified and Trusted
Holds ISO9001, ISO14001, ISO45001, CE, and AAA credit certifications; supplier to major national and international enterprises.
A Bi‑offset Butterfly Valve is a quarter-turn valve with an eccentric shaft design for medium-to-high pressure systems.
Reduced Wear
Dual offsets minimize disc-seat friction, extending valve life.
Low Torque
The offset shaft lowers rotation resistance for easier operation.
Tight Sealing
Cone-shaped seat ensures uniform contact and leak-proof shut-off.
Oil & Gas Pipelines
Medium/high-pressure fuel and gas control.
Water Treatment
Municipal and industrial water distribution.
Petrochemical & Chemical Processing
Non-abrasive and corrosive media handling.
HVAC & Utility Systems
Flow regulation in heating, cooling, and utility pipelines.
Marine & Shipbuilding
Compact, saltwater-resistant valves for tight spaces.
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Option |
Customizable Content |
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Material |
Carbon steel, Stainless steel, Alloy steel, Hastelloy, Titanium |
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Size |
DN15–DN600 (larger sizes available on request) |
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Pressure Rating |
Class 150–600 |
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Sealing Type |
Metal seat, Soft seat (PTFE, Rubber), Fire-safe design |
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Connection |
Wafer, Lug, Double flange, Welded |
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Actuation |
Manual, Electric, Pneumatic, Hydraulic |
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Standards |
API, ANSI, DIN, JIS, ISO |
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Special Features |
Anti-static, Anti-blowout stem, High-temperature resistance, Corrosion-resistant |
As one of the most professional bi-offset butterfly manufacturers and suppliers in China, we offer a wide range of valves with superior quality. Please feel free to wholesale high quality bi-offset butterfly at competitive price from our factory. We also accept customized orders.
Triple Offset Wafer Type Butterfly Valve, Bi offset LUG Butterfly Valve, butterfly valve(0/10)
