What is the difference between different types of pneumatic actuators and the debugging method of stroke
We know that there are still many types of pneumatic actuators, among which AT, GT and AW are the three common types of pneumatic actuators. These three types of pneumatic actuators have their own characteristics. Different types of actuators are selected according to different occasions and specific situations. So, what are the specific differences between the three types of pneumatic actuators AT, GT and AW?
Wuxi Xinming automatic control valve industry co., ltd. and you describe different typesPneumatic actuatorWhat is the difference and the debugging method of the itinerary
We know,Pneumatic actuatorThere are still many types of actuators, among which AT, GT and AW are the three common types of pneumatic actuators. Each of these three pneumatic actuators has its own characteristics. Different types of actuators are selected according to different occasions and specific conditions. So, what are the specific differences between the three types of pneumatic actuators AT, GT and AW?
The AT series pneumatic actuator can be said to be a simple actuator. It is designed with a double-piston rack and gear rotating structure. It can also be divided into two types: double-effect and single-effect. The actuator is suitable for In various non-corrosive environments in the field.
GT series pneumatic actuator is a very commonly used, it has many advantages, it can be said that GT series pneumatic actuator can account for 80% or more of the market. It is not only low in price, but also small in size, light in weight, easy to install, and sensitive in action. It only needs an air source to realize the switch of the valve. These characteristics make it a pneumatic actuator with large usage.
The characteristic of AW series pneumatic actuator is that the output torque is larger. Generally, the shift fork type transmission mechanism is selected. The output torque can change with the change of angle. When the valve is opened and closed, its torque is larger. This is consistent with the rules of the valve. There is when the fork and fork arm height coincide, greatly saving space, to meet the needs of a variety of large rotary valve. Not only these, it also has the advantages of safety and explosion-proof, and can be widely used in some production processes with high safety requirements such as power plants and chemical plants.
Debugging method of pneumatic actuator stroke:
1. Adjust the zero point orientation first, give the positioner and 4mADC signals, and make the pressure gauge on the positioner at 0.004MPa;
2. Looking at the full scale, the 20madc signal is in the locator, thus positioning the pressure gauge at 0.2 mpa. Assuming that the pressure of the expression 0.2 mp does not cross the conditioning button, rotate counterclockwise, thus adding the measuring range. Assuming that the pressure gauge is also 0.2 mpa, the measuring range decreases from clockwise direction.
Of course, in addition to adjusting the stroke, the valve orientation debugging process should also be done well, the following is the pneumatic valve orientation debugging analysis method:
4mA given the command signal, hold the set key, the module waits for the indicator to flash, I .e. enter the debug condition. The survey appearance reading should be 4mA, assuming deviation, press "", "-" to adjust to meet the requirements. Then press the set key at this point by which the meter reading should be 8mA. Assuming not, the ""-"key is adjusted, and then a command signal is adjusted to 8mA,12mA,16mA and 20mA by analogy with 8mA. After adjustment, the indicator will shine several times to indicate the completion of the debugging.
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