Plus filtration system

The PLUS system consists of a 400-liter coolant tank, a fabric filtration unit, and a 40/70 bar high-pressure pump

• PLUS is a ready-to-connect system for machine tools when increased pressure and coolant capacity are required to improve machining efficiency. In addition, it can be used solely for coolant filtration by circulating the fluid through the system even when the high-pressure pump is not in operation.
• The system is available in two versions: BASIC and COAX. Both versions feature control implemented with a Siemens LOGO! micro PLC and are equipped with a diagnostic display. The diagnostic display makes it easy for the user to identify the cause of a fault condition and take corrective action.
• The system always includes coolant level monitoring to prevent the high-pressure pump from running dry. The end of the filter fabric is also monitored by a dedicated sensor.
• The PLUS system is connected to the machine tool via I/O interfaces, allowing it to operate under machine tool control. The COAX version additionally enables limiting the high-pressure pump pressure to predefined set values, which are activated via the machine tool’s M-codes.
• A magnetic filter on top of the filter unit is available

Working principle

Coolant filter is designed to filter coolant having a maximum viscosity of 20°cSt at 40°C. It is designed for coolant flow up to 70 l/min and the level of filtration is 25, 35 or 50 microns depending on the filter fabric used. The coolant to be filtered (1) is pumped from the machine tool´s coolant tank onto the filter fabric (2) forming a coolant layer on it (3). The coolant is filtered through the filter so that the dirt particles remain in it (4) and the clean coolant flows into the tank.A layer of sludge slowly accumulates on top of the filter, causing the permeability of the fabric to decrease and the level of the coolant on top of it to rise. Then the level sensor (5) starts the conveyor (6) that transports the filter fabric, which in turn pulls out the clean fabric and transfers the sludge and dirty fabric to its own container (7)