In presence of a considerable amount of fine or impalpable dust, the traditional suction filter would require a cartridge with a filtering degree so high that, along with reducing its operation autonomy, it would also reduce the vacuum pump suction flow rate.
Oil-bath suction filters have been studied in order to overcome this problem.The main feature of these filters is the ability to retain the smallest and most impalpable dust particles, without reducing the vacuum pump suction flow rate.
Oil-bath filters are composed of a sheet steel head and container coupled with an interposed seal and clamped by release clamps.
Inside, besides the oil bowl, there are two steel wool filtering cartridges, one of which is detachable and washable, while the other is fixed. The release clamps guarantee easy access for cleaning operations.
They can be used with any kind of oil, even drain oil, as long as it has a minimum viscosity degree. The ideal oil is the same one used for the pump. Oil-bath suction filters are not recommended for dry vacuum pumps.
They are currently available for capacities up to 300 m3/h.
Operating pressure: from 0.5 to 2000 absolute mbar
Fluid temperature: from -20 to +90 °C
Level of filtration: ≤1 μ