May I ask: What is a labyrinth valve?

A labyrinth valve refers to a control valve whose regulating component has a flow channel shaped like a labyrinth, which is how it got its name. A labyrinth works by increasing the length of the flow channel through twists and turns, thereby reducing the kinetic energy of the fluid and enabling regulation; such valves are generally used for regulating fluids with high pressure differences.

It includes a valve body, a valve core, inner and outer sealing rings, a retaining spring, a limit snap ring, a shunt disc, a valve core protection sleeve, a return spring, a connecting rod, a middle section of the valve, a displacement screw sleeve, a spiral shaft, and a valve stem. The spiral shaft is a hollow shaft, and it is connected to the valve stem via splines ； The outer sealing ring is installed within the sealing housing in the middle section of the valve, and is fixed in place within this sealing housing by a sealing ring gland ； The displacement sleeve is connected to the screw shaft, and at the same time it is connected to the linkage, which in turn is connected to the valve spool ； There are labyrinth grooves in the valve body ； The inner sealing ring is installed in the labyrinth groove of the valve body, with a limiting snap ring fitted along its outer edge ； The protective spring is fixed in the gap remaining between two adjacent inner sealing rings. Its advantages are: it offers reliable sealing performance, and its service life is significantly longer than that of various existing valves ； Compared to valves of the same type, its weight and switching torque are significantly reduced, making it very convenient for manufacturing, processing, and maintenance. It is suitable not only for general medium environments but also especially for special medium environments with high temperatures, high pressures, strong corrosivity, and particle impurities. This post was last edited by Li Xuegang on 2008-4-18 23:51.]

What was said on the 2nd and 3rd floors is correct; labyrinth-type control valves are used in high-pressure medium pipelines, and to prevent flashing and cavitation, the flow channels through which the medium enters and exits the control valve are designed to be very complex. I have seen CCI’s labyrinth-type control valve (known as the DRAG patented technology); it is actually a sleeve-type control valve, created by combining multiple labyrinth elements together to form a sleeve. For specific details, you can look up samples of CCI valves online.