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Complete development & technology in fluid filtration management solutions







 Al Series

 ALH/210 Series

 ALH/420 Series

 OLFS Series

 ALD Series




 Industrial Filtration

ALH/420 Series

The ALH/420-series represent our bypass hydraulic filtration line and is used in many applications, including off-road mobile equipment, heavy-duty vehicles, stationary cranes, stationary hydraulic systems, fork lifts and industrial equipment. It is also used in sophisticated flight simulators, as well as in test stands where cleanliness is crucial.

These systems are based on the AL-series and are equipped with a flow regulator and a bypass valve. The new design guarantees a constant flow and pressure in the filter system, regardless of the flow and pressure outside of the filter system. In addition to withstanding higher operating pressures up to 420 bar, it also offers a considerable weight reduction. As usual, to prevent internal leakages, the new ALH filters have been equipped with NTF’s patented pressure plates. An integrated 5.5 bar safety valve protects the filter element against pressure spikes, which are fatal to filters.

Our ALH/420 series of hydraulic bypass filter systems includes:


For volumes up to 225 liters,

with a capacity of 1.0 liter per minute


For volumes up to 450 liters,

with a capacity of 1.5 liter per minute


For volumes up to 750 liters,

with a capacity of 2.1 liter per minute


For volumes up to 1500 liters,

with a capacity of 4.2 liter per minute



  Download Brochure

  Download Installation Instructions

  ALH/420 downloads

ALH29,,ALH/420 series,bypass hydraulic filtration,equipped with an intergrated manifold,hydraulic bypass filter system,ALH filters are equipped with NTF patented pressure plates

The ALH/420 series can be used in systems with an operating pressure up to 420 bar.