Trunnion Ball Valve

Product Introduction

‌Trnnion ball valve‌is a high-performance ball valve, suitable for high pressure and large diameter occasions. Its design features include a floating valve seat.The valve seat will move when the medium pressure acts, so that the sealing ring is pressed against the ball, thus ensuring the sealing effect. Trunnion ball valves are usually equipped with bearings on the upper and lower shafts of the ball, with small operating torque and suitable for high-pressure and large-diameter valves. are structurally designed to perform well in high pressure and large bore pipes.

Product Advantages

1. Trunnion ball valves usually have two valve body structures: two-piece and three-piece. The middle flange is connected by bolts. The seal uses RPTFE, PPL, PEEK, metal, etc. embedded in the stainless steel ring. There is a spring at the rear of the steel ring to ensure that the valve seat is close to the ball and remains sealed. The upper and lower valve stem are equipped with PTFE bearings to reduce friction and save labor in operation‌‌.

2. When the trunnion ball valve is working, all the force generated by the fluid pressure in front of the valve on the ball is transmitted to the bearing, which will not cause the ball to move towards the valve seat. So, the valve seat will not bear excessive pressure. This design makes the trunnion ball valve have small torque, small seat deformation, stable sealing performance and long service life‌.

3. Sealing principle‌: The trunnion ball valve uses an advanced spring pre-seat assembly with self-tightening characteristics for upstream sealing. Each valve has two seats and can be sealed in every direction, so the installation has no flow direction restriction and is bi-directional. In addition, the trunnion ball valve also has a fireproof structure and automatic pressure relief function, which ensures that it can still maintain a seal during high temperatures or abnormal pressures‌‌.

4. Trunnion ball valves mainly include high-pressure trunnion ball valves, hard seal trunnion ball valves, extended rod trunnion ball valves, API 6D ball valves, and API 608 ball valves.

Trunnion Ball Valves are the ideal choice for applications requiring precise flow control, pressure tolerance, and the ability to handle harsh and high-temperature environments.

DIMENSIONS:(mm)

• Trunnion ball valves have a wide range of applications and are suitable for long-distance pipelines and general industrial pipelines, especially for various corrosive and non-corrosive media. Its strength, safety and resistance to harsh environments are designed with special consideration to ensure its stable operation under various working conditions‌.

• Trunnion ball valves have two structures: a valve seat sealed in front of the ball and a valve seat sealed behind the ball. When the former is closed, the valve seat at the inlet end is pressed to the ball by medium pressure to achieve sealing; When the latter is closed, the medium pressure causes the rear valve seat of the ball to press the ball to ensure sealing.

• The resistance coefficient of the trunnion ball valve is equal to that of the pipe section of the same length, which means that it produces less resistance during the fluid transmission process, which is conducive to improving the efficiency of the system.

• The trunnion ball valve has an automatic pressure relief function. When the pressure in the valve cavity increases abnormally, the trunnion ball valve has an automatic pressure relief function. It can achieve the pressure relief effect by retreating the valve seat away from the ball, and automatically reset after the pressure is released.

Trunnion ball valve

1) Design Standard: API 60D,API608,DIN3357,GB/T12237

2) End Flange: ASME B16.5.JIS B2212.DIN 2543,GB9113

3) Size: 6"-24"

4) Pressure: 150lb~2500lb

5) Temperature: -196℃~450℃

6) Materials: Carbon steel,Stainless steel

7) Suitable Medium: Water,Oil,Gas,Steam

Q1: What is the manufacturing standard of trunnion ball valve?

A1: Manufacturing standard of trunnion ball valves: API608. API 6D.

Q2: Does the trunnion ball valve have an automatic pressure relief device?

A2: The trunnion ball valve adopts advanced spring prefabricated valve seat design, with fireproof structure and automatic pressure relief function.

Q3: What is the safety design of trunnion ball valves?‌

A3: The trunnion ball valve is designed with a fireproof structure, such as a fireproof sealing ring, which can form a metal-to-metal seal through spring force when the sealing ring is burned to ensure a certain sealing effect and meet the requirements of APl6FA and APl607 standards‌.

Q4: What is the sealing performance of trunnion ball valves?

A4: Two-way sealing function enables reliable sealing no matter which direction the medium flows from. This makes it widely used in some systems that require two-way fluid control, such as urban gas pipeline networks, which can meet the needs of airflow transportation and cutoff in different directions.