Operating principle of Evac grease separator
The grease separator is installed in a vacuum network and operated under vacuum condition. Gray water is directed through the inlet to the grease separator tank, where grease and water are separated by gravity according to their density. Fat, oil and grease are trapped at the top of the tank and constitute eventually a crust. The separated water is taken in the lower end of the tank to the outlet and sucked into the vacuum network. After a while the tank has reached its sludge and grease storage capacity and the tank discharge is needed. The discharge alarm is set on a timer. The discharge process includes circulation of wastewater from the bottom to the top of the tank, cleaning with the rotating wash head and tap water, and once the crust is broken down the valves can be turned so that the pump is in discharge mode to the truck. When the low level is reach the discharge pump is automatically stopped. Before restarting the grease separator after a discharge, the tank is filled with water until the high level switch is reached.