A manual high-pressure ball valve is a valve that controls the rotation of the ball to achieve the on/off of high-pressure fluid flow through manual operation (such as handles or gearboxes). Its core structure includes the valve body, ball, valve seat, and operating mechanism.

Working Principle

Achieve alignment of the passage with the piping (open) or perpendicular (closed) through 90° rotation of the sphere, enabling full-bore or reduced-diameter control. The sphere and valve seat are made of hard alloy or surface-hardened treatment, achieving zero-leakage sealing under high pressure through elastic pre-tension.

Structural Features

Valve Body Material: Forged steel (e.g., A105N, F22, F316L) or cast steel (e.g., WCB, WC6), pressure ratings up to PN420 (Class 2500).

‌Sealed Design: Equipped with a spring or bellows pre-tensioning mechanism on the valve seat to compensate for seal face wear; metal seals can withstand high temperatures up to 650°C.‌

‌Actuating Mechanism: Extended handle (DN≤50) or gearbox (DN≥65), torque amplification of 5-10 times, reducing operating torque.‌

Applicable Scenarios

Suitable for controlling high-pressure fluids like natural gas, steam, and oil, with a temperature range of -46℃ to 650℃, and capable of over 100,000 switching cycles.