Robuschi VGI Anti-Cavitation Valves
For Robuschi Liquid Ring Vacuum Pumps RVS Series
VGI: a new anti-cavitation device, which operates by means of a direct non-condensable gas injection into the compression chamber. The VGI device consists of a calibrated orifice, which is specific for each pump size, and of a non return valve, which was specifically designed to prevent the outflow of service fluid when the pump stops. This reduces thus the injection load losses. The non-condensable gas is also supplied to the pump straight after the closing of the suction phase, avoiding, therefore, the pump’s volumetric efficiency penalizing. The device is made of stainless steel. In the RVS ATEX version, the valve is connected to the separator tank or inert gas tank.