The ball valve's ball is elastic. Both the ball and the seat sealing ring are made of metal, resulting in a high sealing pressure. The pressure of the medium itself is insufficient to achieve a seal; external force must be applied. This type of valve is suitable for high-temperature, high-pressure media.
The elastic ball is achieved by creating an elastic groove at the lower end of the ball's inner wall. When the passage is closed, the wedge-shaped head of the valve stem expands the ball, pressing it against the seat to achieve a seal. Before rotating the ball, releasing the wedge-shaped head allows the ball to return to its original shape, creating a small gap between the ball and the seat, reducing friction on the sealing surface and operating torque.
QV347, QV647, QV947 V-type regulating ball valves
The QV347, QV647, and QV947 V-type regulating ball valves have a V-shaped structure in the ball core, providing a shearing effect on the valve seat. Therefore, it is suitable for controlling relevant process parameters in suspension media containing fibers or small solid particles in industrial enterprises such as papermaking, chemical, and metallurgy.
It is particularly suitable for the automatic regulation of fluids containing suspended particles such as pulp, white water, black liquor, and slurry in pulping and papermaking processes.
This V-type ball valve is a fixed ball valve and a single-seat sealed ball valve. Its regulating performance is the best among ball valves, with an equal percentage flow characteristic and an adjustable ratio of up to 100:1. Its V-shaped notch has a shearing effect with the metal valve seat, making it particularly suitable for media containing fibers, small solid particles, and slurries. Three-way ball valves are available in T-type and L-type. The T-type allows three orthogonal pipes to be connected and the third channel to be cut off, serving as a diversion and merging function. The L-type can only connect two orthogonal pipes and cannot simultaneously maintain the connection of a third pipe; it only serves a distribution function.
