Cyclone filter CJF, CJF-V and CJF-HV

The Gram Clean Air cyclone filter CJF, CJF-V and CJF-HV is a compact, compressed-air cleaned industrial filter that uses the cyclone effect for efficient pre-separation. The unit is suitable for filtering welding fumes, grinding dust, cutting fumes and dusty air.

Available in three versions: standard CJF (up to 5,000 Pa), high vacuum CJF-V (up to 40,000 Pa) and extreme vacuum CJF-HV (up to 80,000 Pa).

Gram Clean Air cyclone filter CJF.

Cyclone filter CJF – technical data

Air volume range 500 – 4,400 m³/h Filter area 13 – 42 m² Maximum vacuum (CJF) 5,000 Pa Maximum vacuum (CJF-V) 40,000 Pa Maximum vacuum (CJF-HV) 80,000 Pa Cleaning system Compressed air + differential pressure control Dust container Quicklock, on wheels, ø400mm system flange Delivery Fully assembled, with cable and plug

CJF cyclone filter – features and benefits

Cyclone-effect pre-separation – coarser particles are separated before reaching the filter cartridge, extending filter service life Optimised filter cleaning – differential-pressure controlled compressed-air cleaning keeps the pressure drop low Easy installation and connection – delivered fully assembled, with cable and compressed-air hose

Easy filter replacement – access from the front, minimal dust generation during replacement Quicklock dust container on wheels – quick and clean emptying, easily moved from one place to another Three vacuum versions – CJF (5,000 Pa), CJF-V (40,000 Pa), CJF-HV (80,000 Pa) – suitable for both standard filtration and as a filter for a central

high-vacuum system Compact footprint – suitable for production environments with space constraints

Applications The CJF cyclone filter is widely suitable for various production processes:

Filtering welding fumes and cutting fumes in metalworking Collecting grinding dust in woodworking and metalworking Cleaning dusty air in storage and production areas As part of a centralised filter system serving multiple workstations As a pre-separator before fine filters in cases of high dust load Use together with the Gram Clean Air high-vacuum

unit HFU/HFU-F in a central system

Frequently asked questions about the CJF cyclone filter

What is the difference between the CJF, CJF-V and CJF-HV models? The three models differ in the maximum achievable vacuum. The standard CJF operates at a vacuum of up to 5,000 Pa and is suitable for most standard filtration applications. The CJF-V reaches up to 40,000 Pa, intended for high-vacuum systems.

The CJF-HV supports a vacuum of up to 80,000 Pa and is suitable for systems requiring extremely high vacuum. All models have the same compact design and choice of filter areas (13–42 m²).

Is the CJF cyclone filter suitable for use with the HFU high-vacuum unit? Yes. The CJF-V and CJF-HV models have a specially reinforced construction for high vacuum and are suitable for use together with the Gram Clean Air HFU and HFU-F high-vacuum units.

In this case, the CJF cyclone filter acts as a pre-separator that separates coarser material before the fine filter — this extends the service life of the HFU unit's filter and reduces the maintenance frequency.

How often does the CJF cyclone filter need to be serviced? The maintenance frequency depends on the intensity of the dust load. The differential-pressure controlled cleaning system ensures automatic cleaning of the filter cartridge during operation, which reduces the need for manual maintenance.

Emptying the dust container is required regularly (depending on the application), while filter cartridge replacement occurs less frequently — quickly from the front and with little dust generation.

Which applications are best suited to the CJF cyclone filter? The CJF cyclone filter is best suited to medium-sized production sites where welding fumes, grinding dust, cutting fumes or dusty air need to be filtered. Due to its compact dimensions, it fits well in production environments with space constraints.

Thanks to the three vacuum versions, it can be used both independently and as a filter for a central high-vacuum system.