What are the characteristics of sanitary butterfly valves

What are the characteristics of sanitary butterfly valves

The use of sanitary butterfly valve characteristics

1, sanitary pneumatic butterfly valve is simple, small size, light weight, small flow resistance, flow coefficient, good sealing performance. Adjustment range of sanitary butterfly valves is the automation control system instrumentation execution unit.

2, sanitary butterfly valve with electric - pneumatic valve positioner to electrical signals and compressed air as the driving force, to accept the control system input 4-20mA DC current signal from the regulator to the compressed air, converted into gas pressure signal input and output, Change the valve plate rotation angle (0-90 ° any angle), has a good control parameters such as control flow.

3, the implementing agency piston cylinder and crank conversion structure, the output torque, the volume of fine small, full-sealed waterproof design of high degree of protection. Cylinder body with mirror cylinder, no oil lubrication, friction coefficient is small, corrosion resistance, with superior durability and reliability. All drive bearings are self-lubricating bearings with boundary lubrication, to ensure that the drive shaft does not wear.

How to open the ball valve?

Sanitary ball valve opening process:

1. In the closed position, the health ball valve stem is played as the pressure role of the valve stem, which pressed on the valve seat;

2. When the counter-clockwise rotation of the cast steel ball valve hand wheel, the stem movement in the opposite direction, the bottom of the cast steel flange ball valve flat angle of the ball off the seat;

3. Stem to continue to enhance, and the valve stem spiral groove guide pin interaction, the ball began to frictionless rotation;

4. To fully open position, the health ball valve stem lifted to the limit position, the ball will rotate to full open position.