A cast steel ball valve is a critical control component widely used in industrial pipeline systems, primarily designed to shut off or connect media flow and also capable of flow regulation. Its core structure consists of a valve body, ball, stem, seals, and actuator.
Valve Body: Made of cast steel (e.g., WCB, LCB) via casting, offering high mechanical strength and pressure resistance, suitable for high-temperature, high-pressure, and mildly corrosive environments.
Key Features:
Compact design and ease of operation (introduced in the 1950s).
90° rotation for quick on/off or flow control.
Durable sealing (e.g., PTFE, metal seats) for reliable performance.
Product Features of Cast Steel Ball Valves
Low Fluid Resistance
Ball valves have the lowest fluid resistance among all valve types, ensuring efficient flow control.
Thrust Bearing for Smooth Operation
A thrust bearing reduces stem friction torque, enabling long-term smooth and flexible operation of the valve stem.
Superior Seat Sealing
The seat features excellent sealing performance. Elastic materials (e.g., PTFE) form a tight seal, and higher medium pressure enhances the seal of the ball valve.
Stem Seal Reliability
The stem rotates only without axial movement, preventing damage to the stem packing. The seal improves with increasing medium pressure.
Low Friction & Long Service Life
Materials like PTFE offer excellent self-lubrication, minimizing friction loss and extending the valve's lifespan.
Anti-Blowout Stem Design
A bottom-mounted stem with a protruding step prevents stem ejection. In case of fire damage to the stem seal, the step and valve body form a metal-to-metal contact to maintain sealing.
Anti-Static Function
A spring is installed between the ball, stem, and valve body to dissipate static electricity generated during operation.
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