HYDAC Stat-Free filter element

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To ensure that a hydraulic system operates economically and without risk, it is essential to use filter systems which are capable of absorbing oil ageing products and which can prevent dangerous electrostatic discharges from occurring. Hydac has developed an element technology which inhibits the phenomenon of electrostatic discharge in filter elements, thus reducing the charges in the oil.

Group II and Group III base oils are more environmentally friendly; however, they also display low conductivity and when the oil flows through the filters in the system, an electrostatic charge is generated. This can result in electrostatics being generated and electrostatic discharge taking place in the system. Electrostatic discharges destroy filter elements, damage valves and sensors, accelerate oil ageing and can even cause explosions in the hydraulic tank.

HYDAC has combined good electrostatic characteristics and filtration performance in a new type of filtration mesh pack and element design. The company’s Stat-Free elements have been designed to eliminate electrostatic charging of the oil.

The elements are suitable for applications in power plants, gas turbines, plastic injection moulding machines and calendars (paper industry) and in mobile hydraulics, as well as any other hydraulic and lubrication system which uses low-conductivity oil. They give a high level of operational reliability as they prevent sparks, deflagration and sludge formation in the oil. Longer oil change intervals can be achieved through non-damaging filtration of the oil.