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- screw-roots vacuum pump units
■ screw roots unit features
1.environmental assessment is passed. using dry screw vacuum pump，the recycled material has high purity and can be 100% recycled without pollution, and no sewage treatment is needed in the later stage;
2.save energy. compared with energy saving of more than 40%, water saving is more than 90%;
vacuum unit power
| unit type | motor power | annual electricity consumption (8 hours per day) | annual electricity bill (0.5 yuan per kwh) |
| water ring roots unit | 75kw 7.5kw=82.5kw | 240900度 | 120450元 |
| screw-roots unit | 18.5kw 11kw 4kw=33.5kw | 97820度 | 48910元 |
it can save 143,080 degrees of electricity and reduce the cost of 71,240 yuan per year;
3.the vacuum is high.the ultimate vacuum of water ring roots unit is 200pa.the ultimate vacuumof screw-roots unit can reach 1pa, which greatly shortens the reaction time;
4.greatly improve product quality and purity. the water content of the product can be reduced from the original 0.4% to the current 0.0012%;
5.adapt to the environment and have strong capabilities. because the summer water temperature high water ring pump can not reach the pre-vacuum demanded by the roots pump, the water ring roots unit can not start, andthis situation of screw-roots unit can be completely avoided;
6.long lasting. the gas contact parts are coated with teflon, nickel and hastelloy to improve the corrosion resistance and wear resistance of the pump;
7.low noise and low vibration.the two rotors of screw vacuum pump are subjected to strict dynamic balance correction, and a reasonable gap is left between the two rotors. therefore, the rotor does not collide when the pump is working, and the operation is stable and the noise is low;
8.low failure rate and easy maintenance. the design structure is simple, no mechanical seal is used, no frequent failures due to pollution, easy maintenance and repair.
■ roots screw vacuum pump unit typical applications: chemical and pharmaceutical, semiconductor, solvent recovery, molding, crystallization, dry etching, sputtering, steam recovery, high-altitude simulation