In the pipeline engineering, choosing a electric
valve correctly is one of guarantee conditions to meet the requirements.
If you choose the valve inappropriately, it will not only affect
the use, but also bring us adverse consequences or severe loses.
Thus, we should be right to choose a electric valve during the
project.
The Electric valves' working environment
Besides paying attention to the pipeline parameter, the working
environment of
electronic valve is also very
important. Because the electric device is just a electrical equipment
of electronic valve, the environment make great effect on the
working conditions.
Some common working places as follows:
1. installed indoor or used outdoor under protective measures
2. installed in the open air where corroded by wind, sand, rain
and dew, sunshine, etc
3. flammability, explosive air or bug dust
4. humid tropics, dry tropics
5. pipeline medium temperature above 480¡æ
6. environment temperature below -20¡æ
7. easy in flooding or water
8. radioactive substance (nuclear power plant and radioactive
material experiment device)
9. ships or dock terminal (salt fog, mould, damp)
10. violent vibration occasion
11. easy to fire
To the conditions of electronic
valve mentioned above, there are differences between
electronic equipment structure, material and protection measures.
So the electronic equipment should be chosen according to the
working conditions.
The Electric valves' functional requirements
According to the engineering control requirements, the electronic
valve's control function is achieved by electronic equipment.
The aim to use the electronic valve is to realize inartificial
electrical control or computer control by opening, closing and
adjusting the valves. Now the use of electric device is not only
to save the human power. However, the large distinguish from different
factories' product function and quality. Thus choosing electric
device is as important as choosing matched valves.
The Electric valves' electrical control
Due to the continuously improve to the industrial automatic level,
there are more and more needs to the electronic valves. What is
more, there are higher and higher control requirements and the
design is also being updated at present. Along with the advancement
of science and technology and the popularization of computer application,
some new type and diversity electrical control will be developed
gradually. Considering the whole control of the valve, we should
choose the electronic valves' control method. For example, as
to the project, whether to use the centralized control or to single
control method; whether linkage with other facilities, whether
controlled by program or application computer program, because
their control principles are all different. The sample which is
given by the valve electronic device factory is just electrical
control principle standard, so use department should communicate
the technology with electronic device accurately.
In addition, when you select an
electronic valve you should think whether to purchase
electronic valve controller additionally. Generally, the controller
needs to be purchased alone. While in most case, when you use
the single one it is necessary to buy it. For it is more convenient
and cheaper than that designing by the user. When the function
of electrical control does not meet the engineering design's need,
you could propose modify of redesign to the factories.
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