Trunnion Ball Valve
XURI is an API 6D certified trunnion ball valve manufacturer specializing in pipeline-grade isolation solutions for oil and gas transmission, LNG terminals, and high-pressure energy industries worldwide.
Featuring a fixed-ball structure supported by upper and lower trunnion shafts, these valves reduce operating torque and maintain stable sealing performance under high-pressure conditions up to Class 2500. Available in sizes from DN50 to DN1400 with full-bore or reduced-bore configurations.
Engineering Advantages:
- API 6D certified design (Certificate 6D-0963)
- Double Block and Bleed (DBB) capability for positive pipeline isolation
- Fire-safe design certified to API 607
- Anti-blowout stem design with live-loaded packing for fugitive emission control
- Emergency sealant injection system for emergency shut-off
- Anti-static device and cavity pressure relief as standard
Typical Applications
- Pipeline pigging launch and receiver stations
- Compressor station unit isolation
- Metering skid isolation valves
- Storage tank farm manifolds
- Offshore platform riser isolation
Technical Specifications
| Design Standard | API 6D / ASME B16.34 |
| Pressure Class | Class 150 – Class 2500 |
| Size Range | DN50 – DN1400 (2" – 56") |
| Body Materials | Carbon Steel, Stainless Steel, Duplex, Inconel Cladding |
| Seat Design | Soft Seat / Metal Seat |
| End Connections | Flanged (RF/RTJ), Butt-weld |
| Operation | Manual, Gearbox, Pneumatic, Electric |
| Fire Safe | API 607 available |
| Function | DBB / DIB optional |
Standards & Certifications
- API 6D — Pipeline valve design and testing (Certificate No.: 6D-0963)
- API 607 — Fire-safe testing
- API 598 — Shell and seat pressure testing
- ISO 9001 — Quality management system
- NACE MR0175 — Sour service compliance
Why Choose XURI
Manufacturing Capability
XURI operates professional valve manufacturing facilities with in-house casting capability and an annual production capacity of 6,000 tons.
Quality Assurance
Complete inspection process including PMI, NDT (Co60 ray detection), hydrostatic testing, and dimensional inspection ensures product reliability.
Engineering Experience
Supporting severe service applications including oil and gas, LNG, petrochemical, and power generation projects worldwide.
Global Supply
Products supplied to EPC contractors, distributors, and industrial projects across 30+ countries, with factory-direct pricing and on-time delivery.
FAQ
What is a trunnion ball valve used for?
A trunnion ball valve is used for large-diameter pipelines and high-pressure applications where reliable shut-off, low operating torque, and pipeline pigging capability are required.
What is the difference between floating and trunnion ball valves?
Unlike floating ball valves, trunnion ball valves use fixed support shafts to absorb line pressure loads, reducing operating torque and improving sealing performance under high-pressure conditions.
Does XURI provide API 6D certified ball valves?
Yes. XURI trunnion ball valves are manufactured according to API 6D requirements (Certificate 6D-0963) and can be supplied with DBB, fire-safe, and emergency sealant injection configurations.
What materials are available for trunnion ball valves?
XURI offers carbon steel, stainless steel, duplex stainless steel, and Inconel-clad options to meet different service conditions including sour gas, high temperature, and corrosive environments.
What size range can XURI supply?
XURI trunnion ball valves are available from DN50 (2") up to DN1400 (56") with pressure ratings from Class 150 to Class 2500.