Lined Ball Valve Features And Performance

The ball of a Lined Ball Valve floats. Under the influence of the medium pressure, the ball can move a certain distance and press against the sealing surface at the outlet, ensuring a tight seal.
Floating ball valves are small, lightweight, simple in structure, and provide excellent sealing. However, the load of the working medium on the ball is entirely transferred to the outlet sealing ring. Therefore, it is important to consider whether the sealing ring material can withstand the working load of the medium.
Features and Performance of Floating Ball Valves
Small in size, light in weight, and simple in structure, the ball floats freely, ensuring a good seal. The ball valve uses a sphere with a circular through-hole as the opening and closing element. Driven by the valve stem, the ball rotates 0 to 90 degrees around the center of the stem to complete the opening and closing function. It features a compact structure and fast opening and closing. A 90-degree rotation closes the valve and cuts off the medium in the pipeline. The ball passageway diameter is the same as the pipeline diameter, resulting in low flow resistance and high flow capacity. The valve stem is bottom-mounted, eliminating the risk of stem protrusion and ensuring safe operation.
The ball of a fixed ball valve is fixed and does not move under pressure. Trommel-mounted ball valves all feature floating seats. Under pressure from the medium, the seats move, pressing the sealing ring against the ball to ensure a tight seal. Bearings are typically installed on the upper and lower shafts of the ball, resulting in low operating torque and suitable for high-pressure and large-diameter valves.

Features and Performance of Trommel-mounted Ball Valves
Trommel-mounted ball valves are suitable for medium- and high-pressure pipelines, shutting off or connecting media in the pipeline. Available in different materials, they can be used with various media, including water, steam, oil, liquefied petroleum gas, natural gas, coal gas, nitric acid, acetic acid, oxidizing media, and urea. They are widely used in industries such as petrochemicals, power generation, and water conservancy. Common actuation methods for trommel-mounted ball valves include worm gear drives, manual, electric, and pneumatic. Most trommel-mounted ball valves are flange-mounted, but welded versions are also available.

Simply put, the key differences between trommel-mounted and floating ball valves are:
a. Floating ball valve: The valve core ball rotates freely between the two valve seat seals, facilitated by the valve stem.
b. Fixed ball valve - the valve core ball is connected to the valve stem and rotates around the center of the valve stem. It is a ball valve with a floating ball and an elastic movable sleeve valve seat.