Lined Ball Valve Introduction

Lined Ball Valve utilizes a wedge and dovetail groove. This bidirectional, metal-sealed expansion ball valve breaks away from the traditional integral ball rotation structure by splitting the valve ball into three parts: a wedge and two spherical caps. Its operating principle is that during the ball valve's opening and closing rotation, the dovetail groove brings the two spherical caps together, separating the ball's front and seat sealing surfaces. This prevents friction between the sealing surfaces during rotation and significantly increases the valve's service life. Once the valve is fully rotated, the wedge pushes the two spherical caps against the seat's front, achieving a seal. This valve is suitable for high-temperature and high-pressure applications and is safe and reliable.

When the valve is open, the three-petal ball is brought together by the dovetail groove, separating the ball from the seat and safely relieving pressure in the valve cavity. The ball then rotates to the opening or closing mechanism. This eliminates contact between the sealing elements during the opening and closing process, achieving a frictionless seal and easy operation. This significantly extends the valve's service life. The three-flap valve ball uses a retaining ring to position the opening and closing motion of the valve seat, ensuring the two flaps are centered in the valve seat. This creates a wear-free seal that allows the flaps to expand and contract. This solves the problem of traditional floats shifting up and down, squeezing the upper and lower valve stems, and causing uneven wear on the sealing surfaces and leakage.

This ball valve, suitable for low-temperature service, features a long-neck design that keeps the packing away from the media, preventing packing failure. This design is fundamentally different from an extended operating mechanism.