trunnion ball valve
Trunnion Ball Valve Manufacturer for High Pressure Industrial Applications
ZONCIC supplies high-performance trunnion ball valves manufactured according to API, ASME, DIN, JIS and GOST standards. Our trunnion mounted ball valves are widely used in oil & gas, petrochemical, long-distance pipeline, refinery, power generation and other severe service industrial systems.
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What Is a Trunnion Ball Valve?
A trunnion ball valve is a quarter-turn valve in which the ball is mechanically anchored by upper and lower trunnions. Unlike a floating ball design, the ball remains fixed in position while the seats move toward the ball under pressure, which greatly reduces operating torque and improves sealing performance in high-pressure and large-size applications.
As a professional trunnion ball valve manufacturer, ZONCIC provides robust valves designed for demanding operating conditions, including high pressure, large diameter and critical shut-off service. Trunnion mounted ball valves are widely chosen for transmission pipelines, oil terminals, refineries and petrochemical plants.
Key Features of Trunnion Ball Valve
- Trunnion mounted ball design for low operating torque
- Suitable for high pressure and large diameter service
- Reliable bi-directional sealing performance
- Double block and bleed design available
- Fire-safe and anti-static construction available
- Emergency sealant injection system optional
- Compatible with gear, pneumatic and electric actuators
- Suitable for severe service oil, gas and process applications
Technical Specifications
Our trunnion mounted ball valves are available in a wide range of sizes, pressure ratings, materials and end connections. We support customized production according to project specifications, end user standards and international industrial requirements.
| Item | Specification |
|---|---|
| Valve Type | Trunnion Ball Valve / Trunnion Mounted Ball Valve |
| Size Range | 2″ to 48″ (DN50 to DN1200) |
| Pressure Rating | Class 150 to Class 2500 / PN16 to PN420 |
| Body Materials | WCB, LCB, CF8, CF8M, Duplex Stainless Steel, Alloy Steel |
| Ball Materials | SS304, SS316, SS316L, Duplex Stainless Steel |
| Seat Materials | PTFE, RPTFE, Nylon, PEEK, Devlon, Metal Seat Optional |
| End Connections | Flanged, Butt Weld |
| Operation | Lever, Gear, Pneumatic Actuator, Electric Actuator, Hydraulic Actuator |
| Manufacturing Standards | API, ASME, DIN, JIS, GOST |
| Design Standard | API 6D, ASME B16.34, ISO 17292 |
| Face to Face | API 6D, ASME B16.10 |
| Flange Standard | ASME B16.5, ASME B16.47, DIN, JIS, GOST |
| Inspection and Testing | API 6D, API 598, ISO 5208 |
| Applicable Temperature | -46°C to 200°C (depending on material and seat selection) |
| Applicable Media | Natural Gas, Crude Oil, Refined Oil, Water, Steam, Chemical Media |
Main Parts and Materials
| No. | Part Name | Material |
|---|---|---|
| 1 | Body | WCB / LCB / CF8 / CF8M |
| 2 | Bonnet / End Cap | WCB / LCB / CF8 / CF8M |
| 3 | Ball | SS304 / SS316 / Duplex SS |
| 4 | Upper Stem | SS410 / SS304 / SS316 |
| 5 | Lower Trunnion | SS410 / SS304 / SS316 |
| 6 | Seat Ring | PTFE / RPTFE / Nylon / PEEK |
| 7 | Seat Insert | PTFE / Nylon / PEEK |
| 8 | Stem Packing | PTFE / Graphite |
| 9 | Body Gasket | Graphite / Stainless Steel + Graphite |
| 10 | O-Ring | NBR / FKM / Viton |
| 11 | Spring | Inconel / Stainless Steel |
| 12 | Bolts & Nuts | B7 / 2H / B8 / B8M |
Main Dimensions
| Size | DN | L (mm) | H (mm) | W/Gear (mm) | Connection | Pressure Class |
|---|---|---|---|---|---|---|
| 2″ | 50 | 178 | 180 | 250 | Flanged | 150 / 300 / 600 |
| 3″ | 80 | 203 | 210 | 300 | Flanged | 150 / 300 / 600 |
| 4″ | 100 | 229 | 250 | 350 | Flanged | 150 / 300 / 600 |
| 6″ | 150 | 394 | 330 | 500 | Flanged / Butt Weld | 150 / 300 / 600 / 900 |
| 8″ | 200 | 457 | 390 | 650 | Flanged / Butt Weld | 150 / 300 / 600 / 900 |
| 10″ | 250 | 533 | 460 | 800 | Flanged / Butt Weld | 150 / 300 / 600 |
| 12″ | 300 | 610 | 530 | 950 | Flanged / Butt Weld | 150 / 300 / 600 |
| 16″ | 400 | 686 | 680 | 1200 | Flanged / Butt Weld | 150 / 300 |
| 20″ | 500 | 762 | 820 | 1500 | Flanged / Butt Weld | 150 / 300 |
| 24″ | 600 | 914 | 980 | 1800 | Flanged / Butt Weld | 150 / 300 |
Note: Dimensions above are for reference only. Customized trunnion ball valve dimensions can be provided according to API, ASME, DIN, JIS, GOST standards and specific project requirements.
Manufacturing Standards and Quality Control
ZONCIC manufactures trunnion ball valves in accordance with international industrial standards to meet the requirements of global oil & gas, pipeline and process industries. We support American, European, Japanese and Russian standard systems for international project supply.
- API Standards: widely used for oil & gas transmission, pipeline and petrochemical applications
- ASME Standards: suitable for industrial pressure piping and severe service process systems
- DIN Standards: suitable for European industrial and engineering projects
- JIS Standards: suitable for Japanese and Asian market requirements
- GOST Standards: applicable for Russian and CIS industrial projects
Each trunnion mounted ball valve can be supplied with material certificates, pressure test reports, NDE documentation and other quality records according to customer and project requirements.
Applications of Trunnion Ball Valve
Trunnion mounted ball valves are widely used in heavy-duty industrial systems that require stable sealing, low operating torque and reliable shut-off under high pressure and large size conditions. They are especially suitable for critical service and long-distance pipeline applications.
- Oil and gas transmission pipelines
- Petrochemical and refinery plants
- Natural gas distribution stations
- Offshore and onshore energy projects
- Power generation and utility systems
- Large diameter industrial process piping
Why Choose ZONCIC as Your Trunnion Ball Valve Manufacturer?
- Professional experience in industrial trunnion mounted ball valve manufacturing
- Support for API, ASME, DIN, JIS and GOST standard production
- Wide pressure range from Class 150 to Class 2500
- Strict quality control from raw material inspection to final pressure testing
- Available fire-safe, anti-static and DBB design options
- Support for project documentation, MTC, NDE and export requirements
- Stable supply for contractors, distributors and end users worldwide
Frequently Asked Questions
What is the difference between a trunnion ball valve and a floating ball valve?
A trunnion ball valve has the ball mechanically supported by upper and lower trunnions, which reduces torque and improves stability in high pressure and large size service. A floating ball valve relies on line pressure to push the ball against the seat and is more commonly used in smaller sizes.
What standards can your trunnion ball valves be manufactured to?
We can manufacture trunnion ball valves according to API, ASME, DIN, JIS and GOST standards depending on the export market, end user requirements and project specifications.
What are the main advantages of a trunnion mounted ball valve?
The main advantages include low operating torque, stable sealing performance, suitability for large diameters and high pressures, and reliable shut-off in severe service pipeline systems.
Can trunnion ball valves be used with actuators?
Yes. Trunnion ball valves can be equipped with gear operators, pneumatic actuators, electric actuators and hydraulic actuators according to site operating requirements.
Do you offer customized dimensions and special materials?
Yes. We support customized sizes, pressure classes, special alloy materials, special trims and project-specific technical requirements for trunnion mounted ball valve applications.
Request a Quote for Trunnion Ball Valve
Looking for a reliable trunnion ball valve manufacturer in China? Contact ZONCIC today for catalogs, technical support and competitive quotations.
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