Side Entry Trunnion Ball Valve

Side-entry trunnion ball valve is a high-performance valve that combines the side-entry assembly design (ball and seat are installed from the side) with the trunnion-fixed ball structure, which is used to control the on-off of the fluid. Its core feature is the combination of the convenient maintenance of the side-entry type and the stable sealing of the trunnion type, which is suitable for harsh working conditions such as high pressure and high temperature.

 Structural features ‌
The structural design of the side-entry trunnion ball valve optimizes reliability and operability:

‌Side-entry assembly structure‌: The valve body adopts a two-piece or three-piece flange connection, and the ball is installed from the side, which simplifies the disassembly and maintenance process. Internal components (such as valve seats or seals) can be replaced without removing the entire valve.
‌Trunion-fixed ball design‌: The ball is fixed in the valve body by the upper and lower trunnions (support shafts), ensuring stable rotation of the ball under high pressure to avoid position deviation; the integrated anti-flying valve stem structure prevents the valve stem or ball from rushing out of the valve body under extreme pressure.
‌Sealing system‌: Spring-loaded valve seat or elastic valve seat (such as PTFE or metal hard seal) is used to achieve bidirectional zero leakage sealing; the valve seat is automatically pre-tightened to reduce operating torque and enhance sealing reliability.
‌Fluid channel‌: Full bore or reduced bore optional, low flow resistance design reduces fluid resistance and improves medium flow efficiency.
‌Actuator integration‌: Supports manual, electric, pneumatic or hydraulic actuators, accurately transmits power through the valve stem, and achieves 90° fast opening and closing control.

• Size Range: NPS 2" ~ 40" ; DN50 ~ DN1000
• Pressure Rating: Class 150 ~ Class 1500 ; PN16 ~ PN100
• End Type: RF, FF, RTJ, BW
• Mode of Operation: Worm Gear, Wrench Nut, Electric, Pneumatic, etc.
• Design and Manufacture: API 608 , API 6D or DIN 3356
• Face to Face Dimensions: ASME B16.10 or DIN 3202
• Flange Ends Dimensions: ASME B16.5 , ASME B16.47 or DIN 2543-2547
• Butt-Welding Ends: ASME B16.25 or DIN EN 12627
• Inspection & Test: API 598 , API 6D or DIN 3230
• Fire-Safe Standard: API 607 , API 6FA
• Top Mounting Pad Standard: ISO 5211

 

Side Entry Trunnion Ball Valve

 

 Advantages‌
The core advantages of the side-entry trunnion ball valve are reflected in performance, reliability and economy:

‌Excellent sealing‌: The two-way zero leakage design combined with the elastic valve seat can maintain long-term sealing integrity in high pressure (such as Class 600 conditions) and corrosive media.
‌Easy to operate‌: Low operating torque (automatic pre-tightening of the valve seat), 90° fast opening and closing, and side-entry structure simplify maintenance and reduce labor costs.
‌High durability‌: The trunnion fixed design reduces friction and wear and extends the life of the valve; the material has strong corrosion resistance and is suitable for extreme temperature environments.
‌Versatile adaptation‌: Supports full-bore or reduced-bore configuration, with low flow resistance and large flow, and is easy to integrate various actuators for automatic control.

 Applications

Side-entry trunnion ball valves are widely used in industrial fields that require high-reliability flow control:

‌Oil and gas‌: High-pressure natural gas transmission pipelines, sulfur-containing crude oil storage and transportation systems, to ensure safe cutoff and zero leakage.
‌Chemical and Metallurgical: Corrosive media (such as acid and alkali) treatment, high temperature flue gas pipeline isolation, materials withstanding harsh chemical reactions.
‌Electricity and Water Treatment‌: Power plant boiler system, cooling water control, high temperature and high pressure resistance to ensure stable operation; management of chemical agent addition in water treatment process.
‌Other fields‌: Pharmaceutical (aseptic system), food processing (sanitary valves) and aerospace (precision fluid control).

Hot Tags: side entry trunnion ball valve, China side entry trunnion ball valve manufacturers, suppliers, factory, ball valve seals, Top Entry Ball Valve, irrigation ball valve, ball valve balls, ball valve installation, ball valve for oil