Pneumatic V-type ball valve is composed of two parts,V-type ball valve and pneumatic actuators consisting of pneumatic V-type ball valve of regulation primarily by pneumatic actuators to achieve, how it is possible? Here,we will detail the process of its implementation:
Pneumatic actuator is driven by the actuator portion which receives the pressure signal electric / pneumatic valve transducer (or electric / pneumatic valve positioner) output and converts it to the corresponding linear displacement of the plunger to push adjusting means.
Pneumatic actuator can be divided into film, piston, rolling diaphragm, rotary vane and other types. Among them, the first three belong to linear actuators, their testimony compressed air power component in linear motion, power unit rotary vane actuator testimony in compressed air rotary motion, is typical of rotary pneumatic actuator.
Pneumatic actuator is driven by the actuator portion which receives the pressure signal electric / pneumatic valve transducer (or electric / pneumatic valve positioner) output and converts it to the corresponding linear displacement of the plunger to push adjusting means.
Pneumatic actuator can be divided into film, piston, rolling diaphragm, rotary vane and other types. Among them, the first three belong to linear actuators, their testimony compressed air power component in linear motion, power unit rotary vane actuator testimony in compressed air rotary motion, is typical of rotary pneumatic actuator.
1. The pneumatic diaphragm actuator for the V notch ball valve.
This executive body more commonly, it is characterized by simple, inexpensive, reliable operation, easy maintenance; not the positioner, the spring can be realized only rely on the implementation of proportional action; when the air supply is interrupted, the pusher automatically returns without signal position, and is equipped with V-type ball valve, can provide a source of security role off the production. But its output stroke is small, it can only accept a lower operating pressure, the maximum pressure is generally 0.25 ~ 0.4MPa, only direct drive V-ball valve stem, therefore, mainly used for general pneumatic regulating valve V-type push devices.
Pneumatic diaphragm actuator can be divided into two types of spring and without spring, there are two kinds of action and reaction mode of action. As shown, when the film-forming chamber gas pressure increased, V-type ball valve stem direction to extend the action film chamber positive-acting actuators, the direction of movement back into the film chamber is reaction type. Different modes of action of the actuator for the V-type ball valve varieties constitute the open air and gas off two functions provided for convenience only. The practical application of the film are the property of pneumatic actuators with spring type of execution, no spring is seldom used.
This executive body more commonly, it is characterized by simple, inexpensive, reliable operation, easy maintenance; not the positioner, the spring can be realized only rely on the implementation of proportional action; when the air supply is interrupted, the pusher automatically returns without signal position, and is equipped with V-type ball valve, can provide a source of security role off the production. But its output stroke is small, it can only accept a lower operating pressure, the maximum pressure is generally 0.25 ~ 0.4MPa, only direct drive V-ball valve stem, therefore, mainly used for general pneumatic regulating valve V-type push devices.
Pneumatic diaphragm actuator can be divided into two types of spring and without spring, there are two kinds of action and reaction mode of action. As shown, when the film-forming chamber gas pressure increased, V-type ball valve stem direction to extend the action film chamber positive-acting actuators, the direction of movement back into the film chamber is reaction type. Different modes of action of the actuator for the V-type ball valve varieties constitute the open air and gas off two functions provided for convenience only. The practical application of the film are the property of pneumatic actuators with spring type of execution, no spring is seldom used.
Now there is a spring in the usual positive-acting pneumatic diaphragm actuator explain the structure and role of the principle. When the signal pressure through the membrane cover 1 and 2 consisting of corrugated diaphragm chamber to produce a thrust on the diaphragm, the push rod 5 downward and the compression spring 6, when the spring force and the signal When the thrust generated by the pressure on the diaphragm balanced, stable putter in a corresponding position, the push rod actuator displacement output is also known as stroke. This actuator is the ratio of the output characteristics, the output displacement and input signal proportional to the pressure.
Pneumatic diaphragm actuator stroke specifications are 10, the effective area of the diaphragm and other 16,25,60,100mm have 200,280,400; 630,1000,1600c resistance of six specifications, the greater the effective area, the greater the thrust actuator.
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