General Description The VO40 is an open-center directional control valve with the flexibility of sectional construction. Consistent with this technology, it is simple in its application, reliable, easy to troubleshoot, and cost effective. The global design reflects the performance and quality expected by today's machine designers. Spools have metering notches in the three critical areas – opencenter, parallel path and tank, which optimizes simultaneous metering. Contemporary honing technology is used to deliver low work port to tank leakage. Additionally, each work section has a transition check to ensure that a load does not "dip" during simultaneous operation. All of these features, plus those listed below, were intended to take machine controllability to the next level. Quick Links:
Operation The VO40 incorporates traditional open-center technology. It is usually interfaced with a constant flow pump, whose flow is routed directly to tank when the spools are in neutral. When one or more spools are selected, flow is directed to the actuators. The throttling of that flow depends upon the spool position and the design of the metering notches. Spool notches can be designed to accommodate resistive loads (meter-in) and negative loads (meter-out). To accommodate multiple pump circuits, split flow and combined flow mid inlets are available. Other OPEN-CENTER DIRECTIONAL CONTROL VALVES (use the links below for additional specifications and information):
About Parker Hydraulic Valve: If you're planning a new Motion Control system or upgrading existing ones, Parker Hydraulic Valve Division is the total resource you can rely on. Most important, Hydraulic Valve Division can help you apply the world's best fluid power technology to your equipment – from the simplest control functions to the most exotic automation environments, as well as everything in between. At Parker we put the control in Motion Control.
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