The importance of the selection of the regulating valve on the pvd coating machine. The regulating valve is the actuator in the automatic control system. Its application quality is reflected in the regulating quality in the system. The application quality of the regulating valve is related to three aspects:

       (1) Correct selection (including calculation)-system designer;
       (2) Product quality-production plant

       (3) Correct installation, use and maintenance-users.

       Therefore, we say that quality is not just a problem for manufacturers, it is a broad concept, including system designers, manufacturers and users. The following are common application problems. If these problems can be handled well, it can be said that you will not have major quality accidents when selecting valves.
       (1) Caliber calculation-Qmax can't be satisfied if it is small, and it can work at a small opening when it is large, with poor adjustment performance and short life.
       (2) Check the △P when it is closed-some do not check at all, causing the valve to not close or open.
       (3) The check adjustable is smaller than R-R can not meet the range of flow change.
       (4) Determine the range of the spring-involving the range of the spring, starting working pressure, output force, stability, adjustment, etc.
       (5) Material and structure-here is the most knowledgeable, an excellent engineering designer
       The selected valve structure and material should be under the premise of satisfying the use function, and get a simple structure and the lowest price
       On the contrary, after spending a lot of money, even if the product is introduced, it is still not used well. The cost can be 20-30 times worse.
       The impact of poor use is even greater, starting and stopping, causing economic losses and a decline in output, and some even cannot be put into use.
       Therefore, an experienced system designer knows the importance of the valve in the field, pays attention to the correct selection of the valve from the beginning, and cooperates closely with us.
       (6) Attachment-guarantee and intentional compensation to the subject.

       The selection of the regulating valve on the PVD coating machine is also a very important link. If the appropriate regulating valve is selected, the later machine operation and life will be longer, so this link must also be paid special attention.