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How to correctly use electric valve.


Author : jacky li Date : 4/19/2016 2:13:17 AM
 In pipeline engineering, the correct selection of electric valve is one of the guarantee condition meets the requirement.
If the improper selection of electric valve for use, not only affect the use, but also the adverse consequences or serious loss, therefore, should correctly choose electric valves in pipeline engineering design.
A, electric valve working environment Electric valves in addition to the pipeline parameters should be paid attention to, still should pay special attention to the work environment, because in the electric valve electric actuator is a mechanical and electrical equipment, its work is affected by its working environment is very large.
Normally, work environment of electric valve has the following kinds:
1, indoor installation or have protective measures outdoor use;
2, outdoor installation, such as wind, sand, rain, sunshine erosion;
3, flammable, explosive gas or dust environment;
4, damp and hot, dry tropics environment;
More than 5, pipes, medium temperature up to 480 ℃;
6 below - 20 ℃, environment temperature;
7, vulnerable to water or flooding;
8, radioactive substances (nuclear and radioactive material test device) environment;
9, ship, or dock (with salt spray, mold, moisture) of the environment;
10 and have severe vibration occasions;
11, easy to fire situation;For the environment of electric valve, the electric device structure, material and protective measures are different.Therefore, should be based on the above work environment to choose the corresponding valve electric device.
The functional requirements of electric valve According to the demand of engineering control for electric valve, the control function is accomplished by electric actuator.The purpose of using electric valves will be opening and closing of the valve and regulating linkage to realize non-human electrical control or computer control.
The electric actuator has not only to save human use.
Due to different manufacturers product functionality and quality differences, therefore, choose and select the valve electric actuator are equally important in engineering.
Of the electrical control system of electric valve Due to the requirement of increasing the level of industrial automation, on the one hand, more and more use of electric valve, on the other hand has higher requirement for electric control valve, more and more complex.
So in the electrical control aspects of electric valve design has been updated.
With the progress of science and technology and the popularization of computer applications, new, diverse electrical control mode will appear constantly.
Considering the overall control of electric valve, should pay attention to choose electric valve control mode.
According to the needs of engineering, for example, whether to use centralized control mode, or single control mode, and other equipment, process control or application of computer process control, etc., the control principle.
Valve electric device manufacturers are only sample standard electrical control principle, so using department should technical clarificaiton with electric plant, clarify the technical requirement.
In addition, when choosing electric valve, should consider whether additional purchase electric valve controller.
Because in general, the controller is need to purchase separately.
In most cases, using a single control, is the need to purchase a controller, because buy controller is convenient, inexpensive than users to design and manufacture.
When the electrical control performance can't satisfy the engineering design requirements, shall be made to the factory to modify or redesign.
The article comes from: http://www.empi-coltd.com/