Split Body Trunnion Ball Valve Description
Split trunnion ball valve is a ball valve that combines a split valve body with a trunnion-fixed ball structure. Its valve body is composed of 2~3 flange-connected parts, which is easy to disassemble and maintain. At the same time, the trunnion design enhances the stability of the ball, achieving efficient cutoff and bidirectional sealing of high-pressure and highly corrosive media.
Core structure and composition
Split valve body:
The valve body adopts a segmented structure (such as two-piece or three-piece) connected by flange bolts, and the internal components such as the ball and valve seat can be inspected without overall disassembly.
The material is mainly stainless steel (316/304), duplex steel (2205) or forged alloy steel, suitable for high pressure (Class 150~1500) and extreme temperature (-196℃~550℃).
Trunion ball assembly:
Trunion fixed ball: The ball is connected to the valve body through the upper and lower trunnions to prevent the ball from displacement or rushing out, improving stability under high pressure conditions.
Double seal valve seat: Adopts spring preloaded metal hard seal (such as Stellite alloy cladding) or PTFE soft seal, leakage rate ≤0.01%, supports two-way cutoff (DBB function).
Split Body Trunnion Ball Valve Specification
|
Type |
Split Body Trunnion Ball Valve |
|
Authentication |
ISO9001,CE, API6D |
|
Medium temperature |
Minus 29 degrees to 150 degrees |
|
Power |
turbine rotation |
|
Flow medium |
Water, Oil, Air, And Some Corrosive liquid |
|
Interface size |
4" |
|
Material |
A105 |
|
Pressure |
900LB |
|
Application |
Can pass through Water, Oil, Air, And Some Corrosive liquid |
|
Structure |
A ball with an opening is used as the valve core, and the ball is rotated to control the opening and closing of the valve |
Split Body Trunnion Ball Valve
Advantages
High-pressure stability: The trunnion-fixed ball design can withstand 70 MPa high pressure, preventing the ball from displacement or vibration.
Maintenance convenience: The split structure supports quick disassembly and maintenance, reducing maintenance costs and downtime.
Corrosion resistance: Duplex steel, nickel-based alloys and other materials can withstand strong acids (sulfuric acid, hydrochloric acid) and sulfur-containing media.
Long life: The wear-resistant hard seal valve seat can last for ≥100,000 opening and closing cycles, reducing the frequency of replacement.
Applications
Long-distance oil and gas pipelines: Used for compressor outlets and gathering stations to prevent high-pressure gas backflow.
Chemical reaction systems: Control the transportation of corrosive media such as sulfur and chloride ions.
Nuclear power and energy: Suitable for high-temperature steam (≤550℃) and cooling water circulation systems.
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