Republic Sales & Manufacturing

DRY ROTARY VANE PUMPS

Republic Dry-Running Rotary Vane Pumps are single stage, dry-cooled and direct driven for continuous operation. The VRT, DVT and DRT smaller pumps (408-440) come with integral motor, while the larger pumps (3060-3250) are available with or without motor. The dry vane compressor can reach up to 21.8 psig, and the dry vane pump can pull a maximum of 25.5” HgV.

WORKING PRINCIPLE

Rotary vane pumps consist of a cylindrical housing (1), eccentrically positioned rotor (2), and numerous free-moving vanes (4). The vanes are placed in the slots of the rotor (3) and, as the rotor turns, the centrifugal force throws the vanes against the cylindrical wall, creating a chamber between the rotor and the cylinder (7). The chamber volume changes as the rotor turns. From the inlet port (5), the chamber volume enlarges, and then decreases towards the outlet port (6). As air enters the inlet port (5) and the chamber enlarges (7), the vanes create a vacuum. As the air is pushed through the chamber and it becomes compressed, pressure is produced at the outlet port (6).