MAHLE automatic filter system AF 173 G for different low-viscosity liquids

Download Press release

PM AF 173 G [PDF; 29 KB]

PM AF 173 G [RTF; 1005 KB]

Automatic filter AF 173 G with pulsating external pressure segment cleaning and integrated cyclone effect.

Principle of operation:
The compact MAHLE automatic filter system is used for the extra-fine and fine filtration of a wide range of different low-viscosity liquids. With this in-line pressure filter, the filtrate flow is neither interrupted nor noticeably reduced during optimum cleaning in-process. It necessitates no waste disposal, for example, in the case of used filter material. The integrated cyclone effect and the downward, tangential flow of the immersion pipe via the outer in-flow chamber relieve the load in the segment element and facilitate pre-separation, of coarse and heavy particles in particular, due to sedimentation in the collection cone. The liquid then flows inward through the MAHLE segment element, up via the inner in-flow chamber. The defined separation of the residual particles takes place on the MAHLE filter material. The filtrate then flows out of the filter at the top, opposite the in-flow connection point.

Once the differential pressure limit or the set interval have been reached, the segment element is turned briefly and the cleaning valve is opened at the same time, for the purposes of brief cleaning in the opposite direction, with compressed air or filtered liquid. The segments pass the external pressure nozzle on the inside and the rinsing channel on the outside. The nozzle alternates between open and closed tightly. The pressure builds up in the external pressure reservoir when the nozzle is closed tightly. Then, whenever it is opened in one of the segments, an outward blast of pressure cleans the deposits of particels from the filter material. The particles are trapped on the outside by the rinsing channel and virtually only discharged with external medium. It only takes one rotation to clean all the segments. The residue deposited in the collection cone can then be emptied through the drain valve while the system is switched off or while it is in operation. An automatic filter variable series, based on this filter and protected by various patents allows great flexibility in responding to a wide range of different filtration requirements, with different cleaning systems and filter materials.

Filter materials
The permissible volumetric flow and the filtration and cleaning behavior of the suspensions are evaluated depending on the viscosity and properties, as well as the size, condition and concentration of the particles or substances which occur.

Standard cleaning control
The cleaning process can be started by means of a differential pressure contact set to a limit, via time intervals or by counting machine cycles.

The MAHLE Group is one of the 30 largest automotive suppliers worldwide. As the leading manufacturer of combustion engine components, systems and peripherals, MAHLE is among the top 3 suppliers for piston systems, cylinder components, valve train systems, air management systems and liquid management systems. MAHLE employs approximately 48,000 employees in 110 production plants and eight research and development centers. In 2007, MAHLE generated sales in excess of EUR 5 billion (USD 7.5 billion).

Öhringen, 09/2008