Home > Products> Ball Valve > Trunnion Mounted Ball Valve

Trunnion Mounted Ball Valve

Why choose us

Our Service
We guarantee to reply clients within 24 hours and solve your problems in the first time with phone call.And our sales team will always be online for 7 days every week.

Product Application
Our products are designed for use in a variety of applications, including water, oil, gas, steam, and severe service environments with high pressure and high temperature conditions.

Our Certificate
We hold several certifications, including CE, ISO 9001, API 6D, ISO 14000, and ISO 18000.

Production Market
Our products are sold in markets across Asia, Europe, and South America.

What Is Trunnion Mounted Ball Valve

The trunnion mounted ball valve is a quarterly turning valve that helps stop the flowing medium in the pipelines. The unique feature of the trunnion mounted ball valve is its disk in a round or spherical shape placed in the centre. This keeps rotating to stop or start the flow. You can call this disk the ball because it is hollow from the centre. The trunnion mounted ball valve provides extra support to the ball. The support is the kind of shaft that is known as a trunnion. This part is extremely useful in absorbing any additional pressure and decreasing the stress on the seats and trunnion mounted ball valve ball. The trunnion mounted ball valve is convenient for high-pressure applications of high-scale where there requires working torque of low-level.

DIB Ball Valve

Double Block and Bleed functionality has been available in ball valves essentially since the developement of the trunnion mounted ball valve commonly used today.

Add to Inquiry
DBB Ball Valve

Double block and bleed valves are used for isolation in critical applications. They also prevent product contamination and maintain system integrity.

Add to Inquiry
Cast Trunnion Ball Valve

Design: API 6D, API 608, MSS-SP-72(BS5351),ASME B16.34. Pressures range: ANSI 150 ~ANSI 2500 ,PN10~PN420. Size range: 2-48 / DN50-DN1200

Add to Inquiry
Forged Trunnion Ball Valve

Design: API 6D, API 608, MSS-SP-72(BS5351),ASME B16.34. Pressures range: ANSI 150 ~ANSI 2500 ,PN10~PN420. Size range: 1-48 / DN25-DN1200

Add to Inquiry
Cast Trunnion Ball Valve

Design: API 6D, API 608, MSS-SP-72(BS5351),ASME B16.34. Pressures range: ANSI 150 ~ANSI 2500 ,PN10~PN420. Size range: 2-48 / DN50-DN1200

Add to Inquiry

Advantages of Trunnion Mounted Ball Valves

Improved performance: Compared to other types of valves, trunnion-mounted ball valves offer higher performance. Due to their design, they can handle high pressure and high temperature, providing reliable performance.

Good sealing: Trunnion-mounted ball valves have better sealing characteristics than other types of valves. The spherical closure sits in a spherical seat, ensuring a tight seal and minimizing fluid and pressure loss.

Low torque

Trunnion-mounted ball valves require low torque to operate, saving energy and reducing wear on the valve and its components.

Long service life

The fixed ball design is robust and can withstand high pressure and temperature, resulting in a long service life.

Easy maintenance

Unlike other types of valves, trunnion-mounted ball valves have a simple design with few moving parts, making them relatively easy to maintain.

Parts of a Trunnion-Mounted Ball Valve

Different types of trunnion ball valves are produced, and you can acquire them from a reliable valve manufacturer in China. The seat rings at the two extremities of the trunnion design are compressed to keep the ball in place. Below are the various parts of a trunnion ball valve.

Body
The body of the ball valve is the casing that supports the internal components and holds them in place. Depending on the intended application, the body may be made from various materials. Common materials include carbon steel, stainless steel, duplex stainless steel, low-temperature carbon steel, Inconel, and super duplex.

Ball
The ball is a spherical element that rotates to start or stop the flow of fluid. One end of the ball is attached to the trunnion, and the other is connected to the stem. As it rotates, the ball is held securely in place. The seats of the trunnion ball valve frequently come into contact with the ball, which reduces the torque required to operate the valve.

Seat
The seat of a trunnion ball valve surrounds the ball and holds it in place when the actuator is engaged, preventing fluid from passing through. There are two types of seats: soft and metal, both of which help to guide the ball’s movement.

Trunnion
The trunnion is an additional shaft that holds the ball in place from below. Its purpose is to keep the ball securely attached. In some trunnion-mounted ball valves, the trunnion is an integral part of the spherical ball, while in other designs, it is connected to the ball through welded joints.

Stem
The stem connects the ball to the actuator. It is attached to the ball by an additional shaft, helping to keep the ball in position. The stem also controls the ball’s movement. Trunnion-mounted ball valves often feature reinforced stems that are resistant to blowout, allowing them to withstand high pressures and temperatures without damage.

Disc
The disc of a trunnion ball valve is a perforated, solid ball. One side is attached to the stem, and the other side is connected to the trunnion. This stabilizes the ball as it rotates. Because the seats are always in contact with the ball, the torque required for operation is reduced.

Actuator
The actuator of a trunnion ball valve is used to open or close the valve. Depending on the application and medium, various types of actuators can be used in ball valves. Common actuators include bare stems, hand levers, pneumatic actuators, gearboxes, and hydraulic actuators. Other options include motor-operated actuators, electric actuators, gas actuators, and gas-over-oil actuators.

Injection
Injection fittings are located near the seat and stem area. When sealing is compromised and leakage begins, grease or sealant can be injected through these fittings to form a partial seal and stop further leakage. Sealant injection fittings should only be used in emergency situations.

How Does A Trunnion Ball Valve Work?

A trunnion ball valve is a simple mechanical device. The ball is inserted into a central bottom shaft, also called a trunnion, by means of an actuator. The ball then rotates against the trunnion to open and close the valve. The actuator turns the stem, which moves the ball. There are seals on the seat and stem to prevent leakage of fluid.

The trunnion is an important part of the valve because of its stable operation under pressure and wide temperature range. The valve is made of several pieces and has a flanged design. The flanged type has a spring-loaded seat and polymer ring inserts to reduce friction. This allows the actuator to rotate in the direction of the ball, which is crucial for the proper operation of the valve.

A trunnion ball valve is a specialized type of ball valve with a wide range of temperature and pressure. Its unique operating dynamics make it useful for a variety of applications. For example, chemical manufacturing plants require strict management of leaks and high reactive temperatures.

A trunnion ball is recommended for these applications because of its high-temperature resilience. In the petrochemical industry, trunnion ball valves are recommended to prevent rupture and leakage. These trunnion ball valves can handle high pressure and high volumes.

Types of Trunnion Mounted Ball Valves

Based on body configuration, the valve type determines how it can be accessed for maintenance or repair. There are two types of trunnion mounted ball valves based on body configuration:

Top Entry Trunnion Mounted Ball Valve
This type of ball valve has a removable bonnet cover on top. The internal parts of the valve can be easily accessed by removing the bonnet. These valves are simple to assemble and disassemble, allowing for maintenance or repairs without removing them from the pipeline.

Side Entry Trunnion Mounted Ball Valve
Also known as split-body trunnion mounted ball valves, these valves have a body divided into two or three pieces, which are bolted together like flanges. One of the pieces is larger than the others and houses the ball and the packing around it. These valves are easier to inspect and repair, as the smaller sections can be removed for access.

Based on Bores
The bore of the valve is the hole at the center of the disk or ball. Trunnion mounted ball valves are classified into two types based on bore size.

Full Port Trunnion Mounted Ball Valve
In full-port valves, the diameter of the bore matches that of the connected pipeline. When the valve is open, the medium flows freely without restriction through the bore. These valves are commonly used in chemical, petrochemical, and refining industries, and in applications requiring pigging.

Half Port Trunnion Mounted Ball Valve
A half-port valve has a bore size smaller than the pipeline's diameter, resulting in restricted flow and higher energy losses. These valves are primarily used in the oil and gas industry.

Based on Assembly
The body of the valve may consist of one, two, or three pieces, connected by welded joints. There are two types of trunnion mounted ball valves based on the number of pieces.

Two-Piece Trunnion Mounted Ball Valve
This valve has two housing pieces connected by threaded connections. It is easy to open one housing piece for cleaning or repair, but the valve must be disengaged from the pipeline before the housing can be removed.

Three-Piece Trunnion Mounted Ball Valve
Three-piece valves have three housing pieces bolted together. You can remove one piece to access the valve's internal parts for repair and maintenance, without disengaging the valve from the pipeline.

Industries that utilize Trunnion Mounted Ball Valve

Oil and gas industries
Trunnion mounted ball valves are perfect for a wide range of applications among several oil and gas industries. Examples of oil and gas industries that utilize trunnion mounted ball valves include gas feed lines, field gas plants, industrial gas processing plants, oil refinery feedstock lines, and crude oil plants.

Pipeline industries
The ability of trunnion mounted ball valves to handle several different applications such as gasses, slurries, and liquids make them highly valuable in the pipeline industry.

Hydrocarbon industries
Because trunnion mounted ball valves are useful for the facilitation of hydrocarbon processing, they are extremely popular among hydrocarbon industries.

Power industries
Trunnion mounted ball valves are suitable for numerous applications such as turbines, skids, generators, compressors which are integral to the operation of power industries.

Chemical industries
Offering incredible safety, durability, and sealing capabilities, trunnion mounted ball valves suit a wide variety of chemical industries where such competencies are imperative.

Trunnion Mounted Ball Valve Materials

Stainless steel is the best material because of its ability to work well under full pressure differential and resistance to heat. Stainless steel trunnion valves have high excellence levels in steam, water and chloride applications.

Of course, these valves are also made from other valve materials such as brass, carbon steel, or glass-filled polymer.

Trunnion Mounted Ball Valves: Common Problems and Solutions

Leakage
Leakage is a prevalent issue with trunnion mounted ball valves, typically arising from poor sealing. This can result in gas or fluid leaks, leading to energy wastage and potential safety hazards. To address this, it's crucial to regularly inspect the valve's sealing rings, ensuring their integrity, and promptly replacing worn-out seals.

Blockage
Over time, trunnion mounted ball valves may accumulate debris or other contaminants, causing blockages within the valve. To maintain optimal flow, regular internal cleaning of the valve is necessary to remove any buildup.

Seizing
Extended periods of inactivity can cause trunnion mounted ball valves to become stiff or even seize up. To preserve the valve's flexibility, routine inspection of its moving parts and the application of appropriate lubricants are essential.

Operational Difficulty
Factors such as high frequency of use or harsh working environments can make operating trunnion mounted ball valves cumbersome, for instance, when valve stems become difficult to rotate. Addressing this issue involves selecting the appropriate length and material for valve handles based on the specific operational conditions to enhance ease of operation.

Structural Damage
In extreme circumstances, trunnion mounted ball valve bodies may sustain damage from external impacts. Implementing measures such as installing valve protection covers or setting up warning signs can help prevent such occurrences and safeguard the integrity and safety of the valve.

Our Factory

Our company owns a full set of equipment,complete processing and testing methods.The establishing of CAD valve design center and three-dimensional simulated manufacturing experimental design system ensures that new products with high quality can be developed promptly.Implementing perfect quality assurance system,our company is making unremitting endeavor for obtaining API certification on the passing ISO 9001, CE, API 6D International Quality Certification.

productcate-1-1

FAQ

Q: What is the difference between a trunnion mounted and floating ball valve?

A: Trunnion ball valves have a higher pressure rating and are therefore better suited for high-pressure applications. Floating ball valves are less likely to leak, making them a better choice for applications where leaks are a concern.

Q: What is trunnion mounting?

A: WHAT IS A TRUNNION MOUNT? A Trunnion mount shock mounts the shock body directly to the linkage – there are two threaded holes on the shock body and linkage bolts thread directly into them. Trunnion mounts have started to become more popular within the last few years with frame manufacturers.

Q: What is the function of trunnion?

A: The primary function of trunnions is to provide a stable axis of rotation or oscillation for a moving part. They are typically attached to the object or structure being rotated or oscillated.

Q: What is the ball and trunnion type?

A: There are two types of ball valves, floating and trunnion-mounted. They are similar in functionality but slightly different in design. In the first, the rotary ball is only connected to the seats. In the latter, it is held in the body with a trunnion.

Q: When to use a trunnion mounted ball valve?

A: A trunnion ball valve is suitable for controlling the flow of such media as It can keep up with the large-scale, high temperatures, and high-pressure nature of such operations.

Q: What is the difference between a ball valve and a ball float valve?

A: Ball valve is a kind of valve, which means that the valve core (sealing part) of the valve is a ball type structure, which is applied in the pipeline to cut off the air flow or water flow; the floating ball valve is because one end of the switch lever is a hollow sealing ball, which can automatically control the switch ..

Q: What are the benefits of trunnion mount?

A: Enhanced Pressure Resistance– One of the significant advantages of trunnion mounted ball valves is their exceptional pressure resistance. The trunnion design distributes the force evenly across the ball, enabling the valve to handle high-pressure differentials without compromising performance or safety.

Q: What is the trunnion on a ball valve?

A: Trunnion ball valves consist of essential components such as the ball, stem, trunnion, bearings, seats, and body. The trunnion supports the ball, ensuring stability and controlled rotation. Bearings reduce friction, while seats provide sealing against pressure.

Q: Does it matter which way a ball valve is installed?

A: Ball valves may be installed in vertical or horizontal pipe runs, they are bi-directional therefore flow direction is not critical, however the best practice is to set up the valve handle to point in the direction of flow whenever possible.

Q: What material is the ball valve trunnion made of?

A: ANIX Trunnion ball Valves, also known as Fixed ball and Mounted ball valve manufactured and distributed by ANIX Valve USA are made of Stainless Steel CF8M / CF8 or Carbon Steel WCB material with class 150, class 300 and class 600 available.

Q: Can a ball valve be backwards?

A: The orientation of the valve stem is not critical, but the optimal way is to set it up vertically for ease of use. Installing it upside down can cause the accumulation of dirt and other sediments on the stem packing. Install the ball valve with the valve stem facing upwards wherever possible.

Q: What is the difference between floating ball and trunnion mounted?

A: A trunnion ball is attached and centred inside the valve body through both a top shaft -the valve stem- and a bottom shaft – the trunnion. A floating ball is attached to the valve body only through the valve stem. As a result, the floating ball ''floats'' in the valve seats.

We're well-known as one of the leading trunnion mounted ball valve manufacturers and suppliers in China. If you're going to buy high quality trunnion mounted ball valve at competitive price, welcome to get more information from our factory.

25mm brass ball valve, mcf ball valves, 90mm ball valve