Due to the pneumatic valve in transit, often damage phenomenon, so pay attention to the following points, in order to avoid similar situation again.
1. Both sides of pneumatic valve should be set with lightweight blocking plate.
2. Medium and small diameter pneumatic valves should be bound with straw rope and transported in containers.
3, large diameter pneumatic valve also has simple wooden frame solid packaging, so as to avoid damage during transportation.
Pneumatic actuators are divided into positive action and reaction two forms, the so-called positive action is the signal pressure increase, push rod downward; The reaction form is that the signal pressure increases and the push rod goes up. The output displacement of this actuator is in direct proportion to the input pressure signal. When the pressure and spring reaction force balance, pneumatic valve push rod stable in a position, pneumatic actuators and angular stroke pneumatic actuators and straight stroke pneumatic actuators two kinds. With the continuous development of intelligent pneumatic actuators, intelligent valve positioner has become an indispensable supporting product. The intelligent valve positioner is equipped with a highly integrated micro-controller, which USES the electric balance (digital balance) principle instead of the traditional force balance principle, and converts the electric control command into the pneumatic positioning increment to realize the valve position control. Using digital on, off and off signals to drive the action of pneumatic actuator; Valve position feedback signal directly through the high accuracy of the position sensor to achieve electrical/gas conversion function. Intelligent valve positioner has the characteristics of improving output force and operating speed, adjusting accuracy, overcoming stem friction and realizing correct positioning. It is because of the continuous intelligence of these supporting products that pneumatic actuators become more intelligent.