HydraForce Insider Blog

5 Things to Consider When Applying Proportional Valves

Posted by David Price on Tue, Jul 05, 2011 @ 12:07 PM

Here at HydraForce our Technical Services department typically receives multiple question daily regarding our Proportional Valves.  Common questions include, "What is the proper dither frequency for a particular proportional valve?' and "What coil should I use with this type of system?".  Following these five simple rules when applying  proportional valves  will prevent field failures, reduce valve instability, and ensure that your system performs as desired without having to reach out to a tech service representative.


 

1. Applying dither to a valve reduces actuator friction and reduces hysteresis.  A good rule of thumb is to use 70 -250 Hz dither frequency on all SP, ZL, and PV valves (flow and directional control valves), and 200-300 Hz dither frequency on TS Valves (proportional pressure control valves). Otherwise, at lower frequencies the actuator will follow the dither signal and the valve output will appear unstable.

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Tags: proportional valves, Directional Control Valves, pressure control valve, proportional flow control valve, proportional pressure control valve, Proportional Directional Control Valves

Using a Proportional Pressure Control as a Directional Control Valve

Posted by David Price on Fri, May 13, 2011 @ 10:05 AM

With Programmable Electronic Controls becoming more prevalent in many hydraulic systems it’s a good time to look at one alternative to Proportional Direction control made possible with the advent of electronic closed loop control.

 

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Tags: cartridge valves, proportional valves, Directional Control Valves, proportional pressure control valve, solenoid operated four way valves, directional control valve, hydraulic manifold design, ecu's, hydraulic circuit