Puhui Valve Supply DoubleEccentric hemispherical valveManual eccentric half ball valve and turbine eccentric half ball valve, with ductile iron shell material, pressure rating of 1.6Mpa, fast delivery within 48 hours! Product consultation.

Product Introduction of Double Eccentric Hemisphere Valve

The double eccentric hemispherical valve achieves the purpose of locking, adjusting, and closing through the transmission mechanism, and its main components include the valve body, valve seat, valve disc, and transmission device. The valve disc adopts an eccentric structure, which has some unique advantages of its own structure. The switch is lightweight, and when opened, the ball and shell will fall off without contact. The pneumatic torque is small and the rotation is flexible. When closed, the squeezing and cutting effect between the hemisphere and the valve seat can remove the emissions on the sealing surface, allowing the valve to open and close smoothly, with high protection and good sealing performance. Double eccentric hemispherical valve is a relatively new type of ball valve that solves the problem of poor valve closure in industrial pipeline transportation, such as slurry, mixed flow liquid, ash and other media, as well as sedimentation of slurry, mixed flow liquid, dust and other media.

The eccentric structure of the sealing surface enables the spherical surface to automatically compensate for wear, maintain the sealing performance of the valve, and have good sealing performance. The eccentric structure between the valve seat and disc can effectively reduce wear and increase the service life of the valve. High flow regulation capability, the double eccentric hemispherical valve has a large fluid channel, can accommodate large flow rates, and has good fluid regulation capability.

We provide you with manual eccentric half globe valves and turbine eccentric half globe valves.

7 advantages of double eccentric hemispherical valve products

1. Low fluid resistance, with a resistance coefficient equal to the same length of pipe section

2. The structure is simple, the volume is small, and the installation space is saved. It is lightweight, easy to install, and convenient for loading and unloading.

3. Tight and reliable, the sealing surface material of ball valves is widely made of plastic, which has good sealing performance and has been widely used in vacuum systems.

4. Easy to operate, quick switch, only need to rotate 90 ° from fully open to fully closed, convenient for remote control.

5. Easy to maintain, ball valve structure is simple, and the sealing ring is generally movable, making disassembly and assembly convenient

6. When fully open or fully closed, the sealing surfaces of the ball and valve seat are isolated from the medium, and the medium will not corrode the valve sealing surface.

7. Widely applicable, ranging from small diameters up to a few millimeters to large ones up to several meters, it can be used for applications ranging from high vacuum to high pressure.

Working principle of double eccentric hemispherical valve

The double eccentric hemispherical valve adopts an eccentric crankshaft, which causes the center line of the ball crown to deviate from the center line of the valve flow channel by an eccentric distance. When the valve is opened, the crankshaft will rotate a small angle, the ball crown will leave the valve seat, and the ball crown and valve seat will no longer be in contact; On the contrary, during the valve closing process, the ball crown only contacts the valve seat when it is closed. This structure provides sufficient protection for the ball crown and valve seat, reduces wear, and extends the service life of the valve.

In summary, the double eccentric hemispherical valve has the advantages of high flow regulation and shut-off capacity, good wear resistance, wide applicability, and easy operation, and is widely used in fluid control systems in various fields.