How to choose a water ring vacuum pump for vacuum coating equipment

1. The choice of water ring vacuum pump for vacuum coating equipment, the determination of pump type The type of pump is mainly determined by the air volume, vacuum degree or exhaust pressure required for work. When the pump is working, you need to pay attention to the following two aspects:

1. It is required to operate in the high-efficiency area as much as possible, that is, in the area of critical vacuum or critical exhaust pressure.

vacuum coating machine,pvd coating machine,pvd vacuum machine,vacuum ion coating machine,multi-arc ion coating machine

2. Avoid running near the maximum vacuum or maximum exhaust pressure. Operating in this area is not only extremely inefficient, but also very unstable, prone to vibration and noise. For vacuum pumps with a high degree of vacuum, cavitation often occurs when operating in this area. The obvious sign of this phenomenon is noise and vibration in the pump. Cavitation will cause damage to the pump body, impeller and other parts, making the pump unable to work.

According to the above principles, when the vacuum degree or gas pressure required by the pump is not high, the single-stage pump can be selected first. If the vacuum degree or exhaust pressure of the vacuum coating machine is high, the single-stage pump is often unable to meet the requirements, or the pump is required to have a large capacity under the condition of a higher vacuum degree, that is, the performance curve is required to be flat at a higher vacuum degree. A two-stage pump can be used. If the vacuum of the vacuum coating equipment is required to be above -710mmHg, a water ring-atmospheric pump or a water ring-Roots vacuum unit can be selected as the vacuum device.

vacuum coating machine,pvd coating machine,pvd vacuum machine,vacuum ion coating machine,multi-arc ion coating machine

If it is only used as a vacuum pump, a single-acting pump is better. Because the structure of the single-acting pump is simple, it is easy to manufacture and maintain, and it has good cavitation resistance under the high vacuum of the vacuum coating machine. If it is only used as a compressor with a larger capacity, a double-acting pump is more appropriate. Because the double-acting pump has large air volume, small size and light weight, the radial force can be automatically balanced, the shaft is not prone to fatigue fracture, and the pump has a long service life.

2. Select the vacuum pump according to the gas volume required by the system. After the pump type is initially selected, for the vacuum pump, the pump model must be selected according to the gas volume required by the system.

Zunhua Baorui Titanium Technology Co., Ltd. is a well-known vacuum coating manufacturer, specializing in the manufacture of various vacuum coating equipment, providing industry customers with customized process solutions and coating equipment.