Eccentric rotary valve is actually an arch section ball ball valve. Due to the eccentric CAM valve, pneumatic device in the drive in the process of valve closing pieces from open to closed forces acting on the valve seat sealing increases gradually, make a spherical valve seat sealing surface and the surface of the valve closed from completely from to contact, and gradually increase its sealing pressure, until completely sealed, and vice versa. This greatly improves the common ball valve sealing conditions and sealing effect, hard sealing materials for use on the ball valve, such as all kinds of metals and hard alloy, etc.) have created favorable conditions, and for use in high temperature and high pressure to wear serious occasion ball valve opened up a path. In addition, the valve with bow cut sphere and clamp connection, saves a pair of flange, so light weight. In addition the valve flow capacity is big, bigger than single-seat and two-seater regulator respectively 50% and 20% above. The valve regulating performance is good, correct the flow feature of equal percentage (between equal percentage and linear). Therefore have been extensively used as eccentric rotary valve pneumatic control valve is used, the second is as a scouring abrasion resistance is applied to contain solid material and high temperature and high pressure situations.

RF type pneumatic piston eccentric rotary valve manufacturing characteristics

1, packing structure of ball valve is similar, the sealing effect is better than straight trip valve. Flow through the valve of the medium is easy to be packing seal.

2, simple flow and smooth, small flow resistance, and can be positive and negative direction.

3, using a wide temperature range. Body and bonnet casting as a whole. With a long neck cover, add heat sink, use the temperature can be - 40 ~ 450 ℃ (use a metal seating) at this time.

4, adjustable ratio. After the valve core and valve seat closed completely positioning (note: when assembling or repair valve core, valve core and should have a certain gap between two axis), then use compression ring, lock ring fixed. At this time due to the valve core and valve seat close contact, the valve stem, flexure deformation force press in the valve core seat. So it can adjust the minimum flow value is small. The adjustable ratio of R = 100.

5, valve core in the process of open or closed, don't like o-type ball valve, valve core and valve seat close contact, therefore, under the same conditions for actuator torque is small. Not only energy saving but also on the valve core and valve seat wear.

6, valve core and valve seat closure instant has shear effect, can cut off the medium fiber, automatically clearing the seat of solid particles, so the eccentric rotary valve can be used in the fiber, special in the medium of solid particles and not clean.