What is the valve corrosive and its harm for the valve? 

Control Valve Installation

Valve corrosion is the leading cause of valve failure, and valve corrosion may lead to the valve’s short life and lousy performance. This artical instroduce what kind of valve corrosive and measurement to protect from valve corrosive .

What is control valve positioner ?

rotary-positioner-bend-bracket

Valve positioners are the devices that are used to put a valve in the right positioner by increasing and decreasing the air load pressure on the actuator. The valve positioner senses the exact position of the valve and communicates to the actuator to drive the valve.