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Speciality Valve is one of the best choice for trunnion mounted ball valve manufacturers in India, which we also in turn export to international markets. We manufacture high quality valves that we tailor for the oil and gas, petrochemical, power and refinery sectors. Our valves are put in large size high pressure pipelines where the issue of reliability and leak proof seal are of great importance.
Unlike what we see in traditional valves, trunnion mounted ball valve has additional mechanical anchoring at the top and bottom of the ball which in turn gives you smooth operation, reduced torque, and extended service life.
What is a Trunnion Mounted Ball Valve?
A trunnion mounted ball valve which has a design that puts a mechanical support at the top and bottom of the ball. This design which is what sets it apart from other ball valves does away with ball movement under line pressure and in turn reduces the operating torque required to operate the valve.
- The seat is sprung and moves into the ball which in turn gives tight seal.
- For large diameter high pressure pipelines.
- In the oil, gas and petrochemical industries. Also used in API 6D pipeline ball valves.
When to Use Trunnion Mounted Ball Valve?
Trunnion seated ball valves are to be used when:
- Pipeline pressure is great (over Class 600 PN100).
- Valve size is greater than 6 inches.
- No leaks and double block and bleed features are required.
- Critical services that include crude oil, natural gas, petrochemicals and LNG are included.
- Long term wear and wear resistance is what we see as key.
This is also an ideal choice for oil and gas transmission pipelines, refinery plants and offshore platforms.
Trunnion Mounted Ball Valve vs Floating Ball Valve
If you need precise shut-off in high-pressure, large pipeline systems, a trunnion mounted ball valve is the best choice. For smaller, less demanding applications, a floating ball valve is sufficient.
Trunnion Mounted Ball Valve Applications
Trunnion mounted ball valves are a common solution in fields which require of tight sealing, safety, and reliability in severe service conditions.
Major Applications:
- Oil and Gas Transmission Pipelines
- LNG and Cryogenic Applications
- Petrochemical and Refinery Plants
- Power Generation Plants
- Marine and Offshore Platforms
- Chemical Processing Units
- Gas Distribution Networks
- Double Block and Bleed Operations
Specific Industry Example:
In oil and gas pipeline systems trunnion mounted ball valves are used to isolate sections of the pipeline during maintenance, prevent leaks, and also which in turn ensure safe operation of the system at high pressure.
Key Components of a Trunnion Mounted Ball Valve
- Valve Body Made of forged steel, cast steel, stainless steel, or alloy steel.
- Ball - mounted using trunnions which reduce torque.
- Seats -Spring-loaded, ensuring leak-proof sealing.
- Stem that which connects the ball to the actuator or handwheel.
- Trunnion - Provides additional ball support.
- Seals and gaskets which prevent leakage in severe conditions.
- Actuator - we have manual, pneumatic, hydraulic and electric options.
Advantages of Trunnion Mounted Ball Valves
- Suitable for large-diameter, high-pressure pipelines
- Low power operation which in turn reduces actuator size and cost.
- Double stage of protection for the best safety.
- Reliable sealing at low and high pressure.
- Increased seat life with less wear.
- In the oil and gas industry which requires high reliability.
Disadvantages of Trunnion Mounted Ball Valves
While trunnion mounted ball valves are great for high pressure and large diameter applications, they have some limitations that industries need to consider:
- Higher Cost - More expensive than floating ball valves due to the complex design and precision engineering.
- Maintenance Complexity - Requires skilled personnel and longer downtime when replacing seats and seals.
- Heavier Design - Bigger body which can be a problem in weight conscious systems.
- Not Suitable for Throttling - Good for shut off but not for precise flow control.
- Space Requirement - Larger face to face dimension can be a problem in compact piping systems.
Despite these disadvantages, industries still prefer trunnion mounted ball valves for long term durability and sealing performance.
Why Choose Speciality Valve – Trunnion Mounted Ball Valve Manufacturers in India
- Proficiency in API 6D and ASME conforming ball valves.
- Wide material range: Forged Iron, Stainless Iron, Duplex, Alloy Iron.
- Available in manual, pneumatic, hydraulic and electric versions.
- Double interlock and drain designs for key services.
- Export to the USA, UAE, UK, Singapore and Europe.
Custom made valves for LNG, petrochemical and offshore use.
A trunnion mounted ball valve is a very reliable solution for oil, gas, LNG and petrochemical industries which use high pressure large diameter pipes. Also with its fixed ball design which features low operating torque and double block and bleed function it is which at the same time provides safety and efficiency in critical flow control applications.
Specialised in the field of trunnion mounted ball valve manufacturers in India Speciality Valve is at the top also which we see in terms of our international standards of products we put out which in turn we see to do very well in very tough environmental elements.
Trunnion Mounted Ball Valve Dimensions
Trunnion mounted ball valves’ dimensions are based on API, ANSI, and ASME standards. Although they do vary by class and size the outlying features include:
- Size Range: From 2 inches to 48 inches.
- Pressure Rating: Class I50 Class 2400 (PN16 PN420).
- End Connections: Flange, butt weld, or hub connections.
- Face-to-Face Dimensions: According to API 6D, ANSI B16.10 which also include.
- Operation: Wheel, Shaft, Pneumatic, Hydraulic, or Electric Actuator.
- Design Standards: API 609, ASME B16.5, BS 5351.
These valves have a larger size and greater weight which is a result of their reinforced design.
Visit Us: https://www.specialityvalve.com/product-category/trunnion-ball-valve/
ADDRESS - 41, 2nd floor, Balasundaram Road, Coimbatore, Tamil Nadu 641018

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