the Brief introduce of Eccentric rotary valve

                                           the Brief introduce of Eccentric rotary valve

The eccentric rotary valve, also known as the cam deflection valve, is a water product of the 1980s. Its working principle is an eccentric rotating fan-shaped ball valve. The eccentric ball crown is tangent to the valve seat. When it is opened, the ball core is separated from the valve seat; When closing, the ball core gradually contacts the valve seat, so that the ball exerts a pressing force on the valve seat

1) Long service life of valve seat. The durable and solid metal or ceramic valve seat sealing ring and eccentric valve core reduce the friction between the valve core and the valve seat during the opening and closing process, improve the damage of the sealing surface of the valve seat and the resistance during opening. When the valve element rotates to the closed position, the valve element and the valve seat sealing ring will automatically overlap, so that the sealing surfaces can be more reasonably matched. The material of valve seat sealing ring can be 316 stainless steel, A105 forged carbon steel, hardfacing carbide and ceramic. The spherical pressure valve seat is easy to damage the crystal stutters, and is suitable for crystal, stuttering and unclean media.

2) Reliable performance. The special valve seat sealing ring design can be self centering, self lapping and dynamically aligned with the valve core, which can improve the service life. The sealing metal bearing can prevent the axial surface of particles from accumulating and prevent the valve core from rotating. Simple flow path, large Kv value and good self-cleaning performance.

3) Multiple operations are possible. The self centering valve seat sealing ring and the solid valve core can achieve sealing when it is used in either direction of forward flow or reverse flow. In the backward flow direction, the turbulent area at the outlet is far away from the sealing surface of the valve seat. In addition, the 90 ℃ stroke of the valve core also helps to reduce the scouring between the valve core and the flowing medium and reduce the possibility of damage. Suitable for two position control.

4) Easy to install. The valve body with flange can be connected with different grades of pipe flanges. With different design requirements, exposed flange screws can also be avoided. The positioning surface and overall effect during installation are also good. It can also provide a compression type flangeless valve body, which can be positioned by flange screws during installation. Small size and light weight.