The fixed cone valve mainly consists of components such as the valve body, nozzle, sleeve gate, rocker arm, inlet and outlet pipes, drive shaft, and floating valve seat. This valve can serve as a free discharge valve at the bypass end of a turbine generator unit or as a valve for pressure reduction and flow regulation control installed in pipelines.

Working Principle

The fixed cone valve is driven by means of manual worm gear, electric or hydraulic power to rotate the rocker arm. The sleeve gate is then driven by a slider to move linearly, enabling the valve to open, close or throttle. Due to the adoption of a self-balancing sleeve gate disc, the hydraulic force does not directly act on the disc but on the fixed cone instead. The driving force is very small, resulting in energy-saving effects. The seal adopts metal-to-metal contact, with a floating Nitronic60 special stainless steel valve seat, ensuring minimal leakage.

Technical Features

The multi-orifice sleeve valve can reduce vibration mainly because of the symmetrical flow channel design. To prevent damage to components caused by cavitation, the cavitation phenomenon is deliberately concentrated in the center of the sleeve and surrounded by water. At this time, the bubbles in the water will be very unstable and break in the water instead of on the valve wall, thus eliminating noise, vibration and avoiding valve damage.

The seal design features metal-to-rubber contact, ensuring reliable sealing.

The valve seat adopts a metal-to-rubber design, achieving zero leakage. It is especially suitable for pressure reduction and back pressure regulation under high pressure differentials and can realize the pressure-reducing effect of the pressure valve.

The opening degree and flow rate are linearly related.

The orifices of the nozzle are evenly distributed throughout the entire stroke, and the opening degree and the orifice rate of the nozzle are completely linear, making it very suitable for flow control.

The flow coefficient - opening degree curve of the multi-orifice sleeve valve is linear, which is suitable for simple control, meets the requirements of automatic control, and improves the control accuracy.