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.

Method of Operation:

1.	Fouled tank section	5.	Cover
2.	Pump	6.	mist separator
3.	Pressure filter vessel	7.	Recirculation chiller
4.	Filter cartridges

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.

We supply different types of filter bags as required for specific filtration fineness requirements.

Advantages:

• Reasonably priced, easy to use and dependable
• High level of surface quality of fabricated items being machined
• High filtering capacity and continuous supply of your machine tool with coolant
• No down times during changeover
• Large filter surface area and low floor space requirements (>> 0.6 m2 per filter vessel)
• Low maintenance