The difference and selection of electric valves and pneumatic valves

Brief analysis of single and double acting selection and function of skeeg-fork  pneumatic actuator ! 

Actuator according to different users and types, the main driving mode can be basically divided into electric, pneumatic and hydraulic, Pneumatic Actuator can be divided into fork type and rack type according to the form of the internal structure, relative to the traditional rack type that people are more familiar with, we are going to talk about the fork type Pneumatic Actuator that we don't know much about!
First of all, the operation mode of the scootch Pneumatic Actuator is to push the piston to move in a straight line with the compressed air, which is not the mechanical movement of the rack occlusion used in the past, and the transmission strength is weak, so it is more stable in structure, the overall running state is more stable, and the sealing is good. This structure has less internal loss, longer service life, and strong adaptability to the working environment, especially in some harsh environments, and is better than other types of control methods. It is very fast, and the number of turns on and off can reach 1 million times, especially in some devices that are frequently turned on and off!

Electric valve selection:
When the control mode of the Electric Actuator of the electric valve is generally divided into switch type and adjustment type), in addition to the basic requirements of valve body diameter, pressure, material and other requirements, the following parameters should also be provided:
1. Power supply parameters (including voltage, phase number and frequency); The voltages mainly include AC380V, AC220V, DC24V;
2. Runtime and form of Electric Actuator;
3. Whether explosion-proof and explosion-proof grade are required; The opening and closing time of imported Electric Ball Valve is generally about 10S.
4. Atmospheric protection level;
5. Overload protection requirements, such as over-stroke protection, over-torque protection, etc.;
6. Requirements for on-site operation, such as whether to bring on-site operation handwheels;
7. Operation indication requirements.

Pneumatic valve selection:
1. Air source parameters (including air source pressure range, whether there is a self-provided gas storage tank, etc.); For imported Pneumatic Ball Valves, the air source pressure range is generally 4-8Bar
2. Running time and form of pneumatic actuator; The running time of the imported Pneumatic Ball Valve is generally about 3S.
3. Whether explosion-proof and explosion-proof grade are required;
4. Atmospheric protection level;
5. Overload protection requirements, such as over-stroke protection, over-torque protection, etc.;
6. Requirements for on-site operation, such as whether to bring on-site operation handwheels;
7. Operation indication requirements.
As the level of requirements for industrial automation has increased significantly, the demand for electric (pneumatic) valves has also increased, and the control requirements of electric (pneumatic) valves have become more and more detailed and complex. For the correct selection of electric (pneumatic) valves, not only involves the correct use of the product, but also may affect the safety of the entire pipeline system, users should understand and recognize the relevant selection knowledge.