Does a small vacuum pump really need no maintenance?

Structure:
Head cover, valve plate, cylinder, casing, piston ring, connecting rod assembly, cooling fan, fan cover, shock proof foot
Performance advantages:
1. vacuum degree is up to -98kpa, leading the industry.
2. it is equipped with rubber damping foot pad, which makes the operation more stable.
3.100% oil free and maintenance free.
4. the silence and noise are controlled at about 55 dB.
5. small volume and beautiful appearance.
6. overload protector is installed, and it will not burn out due to overload.
Daily maintenance:
1. Clean the outer part of the enclosure. Please use a dry and soft cloth to clean the dust and dirt outside the enclosure when the power supply is cut off, and clean it at least once a month.
2. Cleaning of air inlet filter and cleaning of filter cotton are very important. It directly affects the flow and life of vacuum pump. Clean it at least once a month. Please screw off the appliance, remove the end cover of the appliance, take out the filter cotton, rinse it with clean water, dry it and install it for use. If it is not possible to clean, replace the filter cotton.
3. Please tighten the fixing bolts of the base and shock absorption foot when using, and try to put them in a place where the air is clean.
4. When the vacuum pump is working, it is strictly forbidden to touch any components on the machine.
5. This product is oil-free vacuum pump, it is forbidden to add oil and lubrication.
6. If the product is not used for a long time, please clean it and put it in a place where it is ventilated and dry.

Liquid ring vacuum pump used in biofuel ethanol industry