Oil collection systems are essential in production environments where metalworking machines use cooling and lubricating fluids. CNC milling, turning, grinding and other wet machining processes generate sprayable emulsion vapour and oil mist, which is quickly dispersed into the work area air. Without proper exhaust ventilation, this causes respiratory irritation and allergies in workers, increases the risk of fire, and leads to slippery floor surfaces and faster corrosion of machinery. Gram Clean Air's oil mist filtration technology uses multi-stage coalescing filtration, in which oil droplets are combined into larger droplets and discharged into a collection tank.
A coalescing filter has lower maintenance costs and is suitable for higher dust loads. The Gram OUF/OUK uses a combined solution: mechanical pre-filter + coalescence layer.
Gram recommends changing the filter fibre every 2000-4000 operating hours. With automatic drainage, the maintenance frequency is significantly reduced.
Yes - The OUF series can be connected to up to four machines using a hub. The OUPC is specifically designed for centralised solutions of 5-15 benches.
The OUK is the most compact solution, mounted directly on the machine. Especially suitable for smaller CNC centres, lathes and milling machines where space is limited.
The OUPC Series is a compact, multi-stage Gram Clean Air filter specifically designed for installation on processing machines that cool lubricants. The unit separates oil mist, emulsion mist, minimum lubrication quantity (MQL) vapours and oil mist directly from the machine air stream before it enters the ventilation or aspiration system. The OUPC is distinguished from the OUF and OUK series by its 5-stage filtration system, which ensures a filtration efficiency of at least 99,95% from all [...]
The OUF series liquid separator is designed to be mounted directly on the processing machine to separate spray cooling oil, cutting emulsion and oil mist generated during the production process before air enters the filter line. The efficient pre-separation in a small, compact housing is suitable for individual machines as well as for central aspiration systems. The OUF works as a mechanical inertial separator: the high velocity air flow is directed in a rotary motion, causing the heavier liquid particles to be separated by centrifugal force on the walls and flow [...] [...]
The OUK series fluid separator is a Gram Clean Air multi-stage fine filter designed for efficient separation of cooling oil, cutting emulsion mist and oil mist in a production environment. The unit can be installed directly on the processing machines or in the aspiration system, ensuring clean working conditions and compliance with industrial hygiene requirements. The separation process is carried out in three steps: first, the air flow velocity is reduced, followed by pre-separation in a grease filter and finally fine filtration in a compact F9 class filter. This multi-stage solution [...]
