Operating Principle - Borger Classic FL Series Operating Manual

3.2

Operating principle

48
1 Suction chamber
2 Transfer from suction chamber to pressure chamber
3 Pressure chamber
Börger rotary lobe pumps are self-priming, valveless, positive dis-
placement pumps.
The rotors are turned in opposite directions via an external drive
using two parallel shafts.
The geometry of the rotors results in a complete separation of the
suction chamber (1) and pressure chamber (3).
The synchronous rotation of the rotor pairs creates a vacuum on
the priming side of the pump, which can be defined by the direction
of rotation of the drive. This vacuum draws the liquid into the pump
chamber.
The dynamic transfer from the suction chamber to the pressure
chamber (2) allows low-pulsation pumping, and nearly pulsation-
free pumping when screw rotors are used. The pumped medium is
forced into the pressure lines on the pressure side (3) through the
rotating, intermeshing rotors.
The symmetrical construction of the rotary lobe pump means that
the flow direction can be changed by reversing the direction of
rotation, provided this is allowed by the system.
Depending on the rotor type, up to six chamber charges are dis-
placed with each drive rotation.
www.boerger.de / www.boerger.com
Product Description
BA-Classic FL_en-US, 03.05.2018