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ZJB-70 1.5KW Roots Booster Vacuum Pump: during its operation. Four sets of inner seals (also known as piston ring) in the two end covers prevent lube oil entering into the pump housing. The shaft seal at the front-end cover, also called ...

2X-4 0.55kw Double Stage Oil Rotary Vane Vacuum Pump: during operation. When the equipment is in vacuum, the high-pressure stage drain valve will be closed, then the gas suctioned by the high-pressure stage will be transferred to the second stage, after ...

2SK-3 7.5kw Double Stage Liquid Ring Vacuum Pump: during the first half turn and the cavity between two adjacent impellers grow gradually thus the pumped gas is drawn into the cavity through crescent suction hole(7) via pump inlet air pipe(4); ...

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ZJB-70 1.5KW Roots Booster Vacuum Pump