SEN oil-free screw air compressor——dry oil-free screw compressor VS oil-free water-lubricated screw compressor

Author:Bella zhang

For medicine, food, semiconductor, chemical industry, fermentation and other industries, oil-free and clean compressed air must be the first choice. SEN oil-free air compressors commonly include dry oil-free screw air compressors, water-lubricated oil-free screw air compressors, Oil-free scroll air compressor, oil-free centrifugal air compressor.

Two types of oil-free screw air compressors are described here—dry oil-free screw compressors VS oil-free water-lubricated screw compressors.

First:

SEN single-screw water-lubricated air compressor is lubricated and cooled by pure water, and the internal parts of the body are made of special materials, medical-grade stainless steel, which will never corrode.

Dry oil-free air compressors still rely on lubricating oil for cooling, and the body will produce oily smell.

second:

The pure water of the SEN oil-free water-lubricated screw air compressor system has been circulating in the system, the system will automatically change the water at the set time to ensure the quality of the water, and the operating temperature of the body is not higher than 50 degrees, so the water in the body Internally unaffected and scale issues.

The operating temperature of the dry oil-free machine is as high as 200 degrees, which directly affects the life of the cooling oil and bearings.

third:

SEN single-screw water-lubricated oil-free air compressors use imported special bearings, so there is no problem with direct water lubrication, high efficiency, low head noise, and fewer bearing combinations.

Twin-screw air compressors generally use FAG or SKF bearings. These are low-temperature bearings with short service life and high noise, and there are many combinations of double-head bearings.

fourth:

SEN single-screw water-lubricated air compressor sprays pure water directly in the air body. Due to the high specific heat value of water, the compression chamber is almost in the ideal state of isothermal compression and the compression process with the lowest energy consumption.

The cooling oil of the dry oil-free machine is about 100 degrees, and the temperature of the compression chamber exceeds 200 degrees. The temperature difference is relatively large, so the energy consumption is relatively high.

fifth:

SEN single-screw water-lubricated oil-free screw air compressor, the body and the motor are directly connected, the speed is as low as 3000 rpm, there is no speed-up gear, the bearing life is long, and the maintenance cost is low.

The dry-type oil-free machine needs to increase the gear between the body and the motor, because the speed is higher than 18,000 rpm, the gear needs to be increased, the bearing life is short, and the maintenance cost is high.

sixth:

SEN oil-free and water-lubricated screw air compressor uses water to cool and lubricate the seal, the air quality is guaranteed, and the speed is about 3000 rpm. The temperature is around 55 degrees and the maintenance cost is low.

The dry-type twin-screw air compressor uses oil to cool the bearings. The air quality cannot be completely clean and environmentally friendly. The secondary compression speed reaches about 18,000 rpm, which is labor-intensive. The temperature reaches about 200 degrees, which is unsafe and high maintenance costs. .