Here’s another Flint Hydraulics Tech Tip: Blade position on a grade-cutting machine is maintained by means of a directional control valve alone or by load-holding valves such as counterbalance valves or pilot operated check valves. The tech’s challenge is to overcome negative functional consequences like hydraulic system inefficiency, system damage, inadequate control, and sloppy appearance. A mobile directional control valve overcomes all of the above. Need help with your mobile application? Call us today at 901-794-4884 or email email@example.com.