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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.
Trunnion ball valves are designed with a fixed ball supported by upper and lower trunnions, ensuring stable operation, lower torque, and reliable sealing in high-pressure and large-diameter pipeline systems.
High Pressure Stability
The fixed ball structure transfers pressure load to trunnion supports, ensuring reliable sealing under high-pressure conditions.
Low Operating Torque
The ball remains stationary under pressure, reducing seat friction and significantly lowering operating torque.
Double Sealing Performance
Spring-loaded seats combined with medium pressure provide tight sealing on both sides of the valve.
Large Size Capability
The trunnion design maintains stability and sealing performance in large-diameter pipeline systems.
Top Entry — Easy inline maintenance without removing the valve
Side Entry — Standard design for general applications
Fully Welded — Ideal for buried and long-distance pipelines
Soft Seated — Suitable for clean media with tight shutoff
Metal Seated — For high temperature, high pressure, and abrasive conditions
Cast Steel — Cost-effective for general industrial use
Forged Steel — High strength for high-pressure and critical applications
Oil & Gas
For high-pressure and long-distance pipeline transmission.
01
Petrochemical
Handles high-temperature and hazardous media with reliable sealing.
02
Power Plants
Suitable for steam and high-temperature systems.
03
Chemical Processing
Ensures safe isolation of corrosive fluids.
04
Large Pipeline Systems
For large-diameter pipelines requiring stable performance.
05
|
Option |
Customizable Content |
|
Material |
Carbon steel, stainless steel, alloy steel, duplex steel |
|
Size |
Standard and large diameters |
|
Pressure Rating |
Class 150 to 2500 |
|
Sealing Type |
Soft seat or metal seat |
|
Connection |
Flanged, welded, threaded |
|
Actuation |
Manual, electric, pneumatic, hydraulic |
|
Special Features |
Fire-safe, anti-static, DBB, anti-blowout stem |
As one of the most professional trunnion ball valve manufacturers and suppliers in China, we offer a wide range of valves with superior quality. Please feel free to wholesale high quality trunnion ball valve at competitive price from our factory. We also accept customized orders.
Metal Seal Trunnion Ball Valve, trunnion ball valve, Soft Seal Trunnion Ball Valve(0/10)
