In the most traditional sense, a directional control valve simply dictates the direction of hydraulic flow in some regard. The inline check valve is generally regarded as the most basic version of a directional valve, and simply allows flow in one direction while blocking flow in the opposing direction. Their advantage lies in their simple, […]
Components
When can you use manual hydraulic valves?
By Josh Cosford, Contributing Editor Although many valves have a manual adjustment, as the knob on a flow control or the hex screw on a relief valve, we generally consider a manual valve to be a directional valve operated by a lever, button or knob. Many hydraulic systems run exclusively with manual valves, like your […]
Joysticks for controlling X, Y, and Z axes of 1, 2, 3 axis stages and actuators
OES (Optimal Engineering Systems Inc.) has expanded its line of Joysticks for 1, 2 and 3 axis stages and actuators. These are easy to use, single-handed, ergonomic joysticks that provide proportional control of the X, Y, and Z axis of from one to three actuators. Low, medium, and high speed ranges are button selectable. The […]
Versatile machines thanks to electronic pump controls
Manufacturers of mobile machines must decide whether to control their pumps using pressure, torque or swivel angle — and always have to accept compromises as a result. The same applies to numerous other hardware parameters which, once defined, stay the same throughout a machine’s service life. According to Simon Dreher, an excavator industry specialist with […]
How are ball valves used to ensure hydraulic safety?
By Josh Cosford, Contributing Editor In fluid power, safety is always a concern. Everyone understands the force capacity of hydraulic actuators (which explains why some YouTube hydraulic press channels have millions of subscribers). Indeed, a high-powered hydraulic press can make nearly any material appear no stronger than modelling clay. It’s wise to respect the power […]
Swing-axle cylinders combine travel comfort with rigid work platform
Mobile machines have to meet widely differing requirements. To get to a job site, they need good off-road capability. While they are working, however, high rigidity and stability are essential. Add to that are increasingly demanding safety and environmental regulations. Swing-axle cylinders are built to fulfill all these requirements. According to engineers at Bucher Hydraulics, […]
eLION platform for electrifying mobile machines
Manufacturers from all sectors have recognized that electric drives are an important building block for future viable, sustainable mobile machines. To support and encourage the electrification of off-highway equipment, Bosch Rexroth is now presenting the eLION product portfolio. The eLION family covers a wide range of components, including a full range of electric motor-generators, inverters […]
Rexroth’s Atom motor, condition monitoring technologies enable uptime in mining
The big highlight for Bosch Rexroth at this year’s MinExpo held in September was its new Hägglunds Atom hydraulic motor. Smaller than traditionally offered over the years, the Atom was actually developed several years ago under a different name but at a much lower pressure rating, said Brian Howell, Hägglunds Sales Manager. But the market […]
The venerable vane pump – is it still relevant?
By Josh Cosford, Contributing Editor I’ll cut to the chase; the best days for the hydraulic vane pump are likely behind us but they’re not quite ready for extinction. Let me tell you why I feel this way. Just like much of technology from the early days of the twentieth century, the vane pump came […]
Modular and block control valves for excavator use
Linde Hydraulics GmbH & Co. KG has introduced a new generation of control valves for use in wheeled excavators. The new valve block VW 22/18 M5-03 for the open circuit is characterized by its modular system, while the monoblock with five sections plus pressure relief section represents the basic set-up. Optionally, three additional sections can […]
