Having the Right Valves for Extreme Motion Control in Your Hydraulic System

Having the Right Valves for Extreme Motion Control in Your Hydraulic System

You know how important it is to have the correct tools to complete a job, right? Just imagine trying to change a tire with only a screwdriver. Now try to image transporting a tractor filled with products with only a bike to pull it. It won’t work, will it? The same is true for having the right parts in your hydraulic system. Having a properly sized motor, durable hoses, and oil with the correct viscosity are essential. One part that you might not being pay close enough attention to is the valves that you are putting into your hydraulic system. If you are interested in achieving an extremely smooth and effective motion control system for your hydraulic machinery, then choosing the proper valve could make a large impact.

Types of 4-Way Valves

When it comes to your hydraulic motion system, it is important to select the right valve if you would like to have a well-performing and low maintenance machine. There are two types of 4-way valves used for cylinder motion control:

  • Current-Driven Servovalves: These contain either a flapper nozzle or jet pipe that is driven by an electric current. The drawback with these valves is that they require occasional readjustments to center them.
  • Servo-Quality Proportional Directional Valves: These are the most common types of valves. They usually require no adjustments and use a linear motor, voice-coil setup, or powerful solenoids to actuate the spool.

The Importance of Linear Valves

To achieve good motion control, a valve’s flow to command signal profile should be linear. While it is possible to use nonlinear valves, they require a bit more setup for motion control. These types of valves are good at providing high maximum velocity control and precise control at lower speeds. You can use these types of valves, but linear valves simply outperform them.

Should You Get Lower-Performing Valves?

Valve manufacturers know that not everyone wants to pay top dollar for advanced, high quality valves. This is why they offer different quality valves, which obtain different levels of performance. However, lower priced valves have smaller solenoids, slower step response, nonlinear flow versus command profile, and lower bandwidth. By going with a higher quality, more expensive valve, you will be able to avoid the headaches that are associated with cheaper quality hydraulic valves. As with any other product, if you pay more money upfront for better quality, chances are that you will spend less later on for repairs and maintenance.

Got Questions? Bernell Hydraulics Can Help!

If any of this seemed confusing, or if you simply do not know what valves you should be using, it’s time to call Bernell Hydraulics! At Bernell Hydraulics, we have been working in the industry for over 40 years, and know what valves are best for your complex hydraulic systems. Count on Bernell Hydraulics to give you the advice and assistance that you need to get the job done. Call us today at 800-326-7252, or visit one of our four convenient locations throughout the Inland Empire.