In today’s competitive economy more and more die casters are upgrading their hydraulic systems with servo valves for better machine performance and higher quality castings. The servo valve delivers this performance because of its extremely high accuracy and response rates of more than one hundred times per sec. The valve has this capability due to its precise internal components and very tight operating clearances (1 to 4 microns).

Although fine operating clearances bring about optimum performance, they also result in enhanced sensitivity to particulate contamination. It is therefore essential that particles in servo controlled hydraulic systems be effectively removed. When one considers the repair/rebuild cost and the high cost of downtime associated with contamination related valve failures, one must conclude that servo hydraulic systems must maintain extremely low fluid contamination levels.