High and medium pressure oil filter HOFFMANN APPARATE

General description

HOFFMANN pressure filters cleanse coolants such as oils and emulsions of:
- metallic particles
- rubber
- plastics
- glass

The filtering capacity for each filter vessel lies between 150 and 200 l/min.

Soiled coolant is pumped into one, or several simultaneously operating pressure filter vessels. These vessels are equipped with nylon support filters and disposable paper filter bags. The soiled coolant penetrates these filter elements from the inside out, and the particles of impurities are trapped in the filter bag.

The so-called filter cake is formed as filtered impurities build up in the pressure filter vessel filter bag. This filter cake represents a high-performance filtering layer that enhances the filtering effect even more. When the filter cake reaches a defined size the throughput capacity of the filter declines and the filter must then be cleaned. Changeover of the facility to the standby pressure filter vessel is made when the signal for cleaning the soiled filter vessel is issued.

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