Fluid Power Journal

Understanding Non-Compressible Fluids

Compressibility is the measure of the change in volume of a fluid due to increased pressure. Atmospheric air and the gases that make up the air are highly …

Verifying the Correct Component Operation

In order to determine whether or not a component is functioning correctly, the troubleshooter must understand the behavior characteristics of each component. …

Determining the Solution To Control Air Cylinder Speed

Because air is a compressible fluid, controlling the speed of actuators is a unique problem. A pressurized air cylinder that is not under load will extend …

Replacing Seals on Valves

Three-way and four-way mobile hydraulic multi-spool directional control valves are available as one-piece units, consisting of a single casting with multiple …

Inspecting Flareless Fitting Assemblies

Assembly instructions Use a tube cutter on the tubing to cut to length and ensure a clean, straight cut. Prepare the end of the tube with a deburring tool to …

Understanding the Function of Valves

Unloading valves (Fig. 1.45): When fixed displacement pumps are used in accumulator or high-low circuits, unloading valves are used to minimize the power …

Understanding Break-Away, Running, & Starting Torque

A motor has a certain amount of mass that must be accelerated to the speed required to do the work. The object being moved also has some mass. The force to …

Sizing an Air Motor

Although electric motors are very commonly found in many varied applications, and hydraulic motors are well known for their high power density, air motors fill …

Calculating Intensifier Ratio for Given Pressure and Flow

Intensifiers boost pressure by pumping hydraulic fluid with a larger bore piston into a smaller bore cylinder to extend the rod. The intensifier can be powered …

Attaching Clamps for Proper Assembly

Low-pressure hose assemblies require properly placing the clamps so that they will seal and retain the fitting. The clamp position “A” dimension is very …

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