The effect of vacuum pump is to remove gas molecules from the vacuum chamber, reduce the gas pressure in the vacuum chamber, and make it reach the required vacuum degree. Vacuum pump can be seen in many fields. There are many kinds of vacuum pump materials on the market. How to choose stainless steel vacuum pump? Next, let’s learn what to pay attention to when choosing stainless steel vacuum pump.
I. correct selection of air extraction volume required by the system
1. If the type of liquid ring vacuum pump or vacuum unit is selected, the correct model shall be selected according to the air extraction required by the system, so it can be seen that when the vacuum degree or gas pressure required by the equipment is not high, the single-stage pump can be selected preferentially.
2. If the requirements for vacuum degree or exhaust pressure are high, the single-stage pump can not meet the requirements or the pump still has a large amount of gas under the condition of high vacuum degree, that is, the performance curve is required to be relatively flat under the condition of high vacuum degree, so the two-stage pump can be selected.
3. If the vacuum degree is required to be above – 710mmhg, roots liquid ring vacuum unit can be selected as the vacuum pumping device.
II. Vacuum degree of equipment
1. The vacuum degree of the selected vacuum pump is required to operate in the high energy range, that is, in the critical vacuum degree or the critical exhaust pressure area, so as to ensure the normal operation according to the required conditions and requirements.
2. Avoid operation near large vacuum degree or large exhaust pressure range. Operation in this area is not only extremely inefficient, but also unstable, which is easy to cause vibration and noise of vacuum pump.
3. For higher vacuum pumps, cavitation often occurs when they operate in this area. The obvious phenomenon of this phenomenon is noise and vibration in the equipment.
4. Excessive cavitation will cause damage to pump body, impeller and other parts, so that normal operation cannot be carried out.
It is very important to choose vacuum pump equipment, so follow the above methods when choosing. Keep in mind the two points for attention in selecting stainless steel vacuum pump. It’s very important to avoid this kind of thing when purchasing in the market. It’s very important to choose a good quality and appropriate equipment, so that our work process and efficiency will be greatly improved.