Split Body Trunnion Mounted Ball Valve Description
Split-body trunnion ball valves derive their name from the trunnion structure integrated into the valve body, making them a critical shut-off valve in industrial control systems. Compared to other types of ball valves, split-body trunnion ball valves offer unique structural advantages, ensuring excellent sealing performance and durability under demanding conditions such as high pressure, extreme temperatures, and other harsh operating environments.
Structural Features
1. Trunnion Support Design
The ball is fixed on both sides by trunnions (short shafts) integrated into the valve body, unlike the free-floating design of conventional ball valves.
The trunnions bear the medium pressure, preventing excessive ball-to-seat contact and reducing wear, thereby extending service life.
2. Bidirectional Sealing
Typically features bidirectional sealing, ensuring reliable performance regardless of flow direction.
Seats are designed as spring-loaded or self-sealing structures, accommodating pressure fluctuations and temperature changes.
3. Large-Diameter & High-Pressure Adaptability
Available in sizes from DN50 to DN1200 (2" to 48") or larger, with pressure ratings covering Class 150 to Class 2500 (PN16 to PN420).
The trunnion support distributes medium pressure, making it suitable for high-pressure, high-temperature, or corrosive media applications.
4. Fire-Safe Design
Seats often combine metal and soft seals (e.g., PTFE). In case of fire, the metal component forms an emergency seal to prevent leakage.
Split Body Trunnion Mounted Ball Valve Specification
Design Standard: API, ASME, EN, ISO, JIS, DIN, BS, GB
Size Range: NPS3/8''-32'' (DN10-DN800)
Pressure Rating: 150-1500LB, 1.0-25.0Mpa, JIS10-100K
End Connection: Flange, SW, NPT, BW, Wafer
Operation: Lever, Gear, Electric, Pneumatic Actuator, Bare shaft, etc.
Advantages:
Maintenance-Friendly
When the valve fails, pipeline workers no longer need to cut and weld-saving 80% of repair time.
Enhanced Sealing
The double-flange design with specialized gaskets reduces leakage risk by 70% compared to standard ball valves.
High Adaptability
The split-body installation feature makes it ideal for space-constrained pipeline retrofitting projects.
Split Body Trunnion Mounted Ball Valve
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