Roots vacuum pump is also known as the mechnical booster which is a positive displacement type pump. It is one of the special pumps which can reach middle, high vacuum rang. Its work principle is similar to the Root fan. Both of them used a pair of rotors, whose shape looks like 8, to achieve the suction and discharge process.According to the technics that the plenty of vapor and solvent is required to pump in the mechnical, phamacy areas, we have improved the seal type of the bearing housing and gear box of the ZJ series Roots pump to reduce the emulsification of the pump oil efficiently and make the Roots pump more suitable to assemble with the water ring vacuu pump to suction more vapor and solvent
Main technical parameters of the Roots pump
| Type | ZJ-30 | ZJ-70 | ZJ-150 | ZJ-300 | ZJ-600 | ZJ-1200 | |
| Suction capacity (L/S) | 30 | 70 | 150 | 300 | 600 | 1200 | |
| Limited vacuum (Pa) | 5*10-2 | 5*10-2 | 5*10-2 | 5*10-2 | 5*10-2 | 5*10-2 | |
| Max. permissible differential pressure (Pa) | 5300 | 5300 | 4500 | 4500 | 4000 | 4000 | |
| Rotation speed(r/min) | 2940 | 2940 | 2900 | 2900 | 2900 | 2900 | |
| DN(mm) | Inlet | 50 | 80 | 100 | 150 | 200 | 250 |
| Outlet | 40 | 50 | 80 | 100 | 150 | 200 | |
| Weight(KG) | 75 | 100 | 215 | 480 | 503 | 1580 | |
| Power(KW) | 0.75 | 1.1 | 2.2 | 4 | 5.5 | 11 |
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