Alfa Laval - Alfie 500

By Alfa Laval


Centrifugal cleaning of coolants

For the metalworking industry, coolants are a major expense. Some are obvious: Replacing them – a messy and timeconsuming task. Disposing of them – a continually rising expense in the face of today’s environmental regulations.

But dirty coolants also incur other less obvious but no less expensive costs. For example, tramp oil and solid particles in coolants can cause increased tool wear, quality problems during later processing and health problems for your

Benefits of the Alfie 500 include:

    * Low fluid replacement/disposal costs
    * Longer tool lifetime
    * Cleaner components, improved end-product quality
    * Less downtime for service since the separator is installed in bypass flow
    * Fewer man-hours required for maintenance of service fluids
    * Healthier work environment
    * Reduced impact on the environment

How it works

In a centrifugal separator, the gravity that causes separation in traditional settling tanks is replaced with a centrifugal force that can be more than 5,000 times stronger. Naturally, this makes separation significantly faster and more efficient.

If buffer plates are added to a settling tank, the sinking of any particles stops sooner, and there is a greater surface area onto which they will fall, helping speed up the separation process. In a centrifugal separator, the same basic principle can be applied, and a corresponding increase in effectiveness achieved, by a stack of special discs.

The centrifugal force presses the heavy particles outwards against the walls of the separator, whereas any lighter particles present tend to follow the liquid phase towards the centre. The disc stack prevents them from doing so, however, making the lighter particles change direction and end up with the heavy particles close to the outer wall.

This makes centrifugal separators an effective way to remove particles as well as easily separating out different liquid components in the feed flow.

Areas of Use

    * Metal working - Cleaning coolants & wash liquid