A fixed three-way ball valve is a valve that diverts, joins, or changes the flow direction of a medium by rotating a ball, with its core feature being the hard seal structure between the ball and the valve seat, suitable for high-pressure and large-diameter pipelines.

Structural Characteristics

Utilizing an integrated valve body structure, equipped with a three-stage hard sealing system (fluorine rubber, composite graphite packing, metal gasket), it ensures sealing reliability under high-pressure conditions. The valve body passage is in a T-shaped arrangement, with an internal分流 ball that achieves three-dimensional motion control through a guiding and limiting structure.

Operating Principle

By manually or electrically actuating the drive mechanism to rotate the valve stem, the ball rotates 90° around the valve body centerline to open or close. When closed, the bottom triangular flat surface of the valve stem mechanically clamps the ball, ensuring a tight fit against the valve seat; when open, the ball rotates frictionlessly to the fully open position.

Sealed design

Seals made of fluororubber achieve radial compression sealing, while a composite graphite packing and a metal-wrapped gasket ensure dynamic sealing of the valve stem and static sealing of the operating hole, respectively. The sealing system is equipped with an automatic lubrication spray unit to prolong its service life.

Applicable Scenarios

High-pressure, large-diameter pipelines for oil, chemical, metallurgical, and other industrial sectors, capable of controlling medium flow direction switching and flow distribution. The fixed structure is suitable for high-pressure conditions (up to 2500LB), with a floating valve seat design that reduces operating torque, facilitating remote control.