Filter Ensures Efficient Recovery of Costly Products During Milling

The latest addition to the ProFi product line is a standalone filter system especially developed for product recovery in milling processes. The newly developed and patent-pending ProFi – Clean filter is easily installed by a clamp connector as a module on the milling chambers or inlets/outlets housings of all Frewitt mills (OscilloWitt, HammerWitt, ConiWitt and TurboWitt). Sieve mills in existing systems can be retrofitted in a few simple steps.

Numerous advantages set this filter system apart from others, including:

• Low-pressure filling — Exhaust air at atmospheric pressure escapes from the milling chamber via the filter, which traps any product. To prevent product build-up on the filter, the exhaust air filter is cleaned by a time-controlled pressure surge. The advantage of this method is that continuous, uninterrupted product filling is possible. The product is fed back into the process by means of the exceptionally efficient pressure surge cleaning.

• Dust-free atmosphere — Particles >5 μm can be filtered out, thus fulfilling the requirements for class M filters (BGIA) of DIN standard EN 1822 (H12). The high filtration efficiency results in a dust-free atmosphere corresponding to OEB level 3. The exhaust air escapes in a controlled manner via the filter (shown by the red arrows in the drawing), thus protecting the operator and the environment from contamination. Various options enable a broad range of applications. For instance, stainless steel cartridges can be used for processes that demand higher mechanical stability, a Venturi system ensures reduced power consumption and H13 class HEPA filters can be used when high quality is expected.    

• Compact and standalone — The filter system consists of the housing, the filter cartridge and the compressed air and control unit, which is attached to the filter housing. This design allows the user to mount the unit on any new or existing Frewitt sieve mill. At this point, it should be mentioned that the HammerWitt is equipped with a connection for an  ISO 2852-compliant DN 32 clamp as a standard feature.

Frewitt took a bold step in a new direction that really paid off. The company applied its expert sieve technology know-how to the development of a filter system that fulfills a critical need, namely the efficient recovery of costly products.

Frewitt SA, +41 26 460 74 00, www.frewitt.com.