(2) The electric butterfly valve, after being used for a long time, is prone to wear of the valve core seal ring, damage of the valve stem and valve seat, resulting in gas leakage in the valve, slow action of the valve or abnormal reversing and other failures. At this time, the sealing ring, valve rod and valve seat should be replaced, or the electric butterfly valve should be replaced.

The pneumatic ball valve consists of a valve body, a valve core and a valve stem. The valve core and the valve stem are linked together. The valve body of the product is equipped with a cylinder. The displacement of the piston rod of the cylinder is linked with the rolling linkage of the valve stem. The cylinder controls the opening and closing of the valve, and then makes it easier. The movement of the cylinder can be controlled through an external solenoid valve or a manual valve, Then it can control the valve switch remotely, which is more convenient.