Principle of Operation
The HydroVac vacuum pump consists of a shrouded rotor rotating freely within an eccentric casing. There is no metal-to-metal contact between the rotor and the casing. Centrifugal force acting on the liquid seal within the pump causes the liquid to form a gas capturing ring inside the pump body creating vacuum. A fixed port cylinder inside the rotor directs the gas into the suction ports. Gas is trapped between the rotor blades by the liquid pistons as the liquid seal recedes from the port cylinder.  The gas is trapped at the point of maximum eccentricity and is then compressed by the liquid ring as it is forced radially inward toward the central port cylinder. After each revolution, the compressed gas and accompanying liquid are discharged through the exhaust port.

During the pumping cycle the gas is in intimate contact with the sealing liquid and compression is nearly isothermal. When handling saturated vapor-gas mixtures the liquid ring acts as a condenser, greatly increasing the effective capacity of the pump.

HydroVac vacuum pumps cover a wide range of applications from 10 to 280 ACFM at vacuum to 29 inches of mercury (25 Torr). These pumps are ideally suited for wet vacuum applications or where condensable vapors are present.   Because there is a selection regarding materials of construction, the application can be attacked with either bronze or stainless steel pumps. 

We have featured the one pump at this time but we have many others in this category with differing flows and differing pressures.  Simplex or Duplex systems.  Once thru or self contained/full recovery packages.