Fluid Power Journal

Aerated Oil on a Log Splitter

I loaned my log splitter to a friend whose tree fell after a storm. The tree was a blue spruce evergreen about 30-ft. tall. It surprised me that the tree’s …

Kidney Loop

We are in the Fluid Power business.  We are convinced that Fluid Power is the right choice for transferring energy in this specific application.  We know …

Oil Rig Top Drive Knocking Noise in the Pump

A drill rig operator was complaining about a knocking noise coming from his top-drive HPU. It controlled a hydraulic motor that drove a winch attached to the …

Simulating a Piezoelectric-Actuated Hydraulic Pump Design

Hydraulic pumps are often the focus of automotive engineers attempting to reduce energy losses. For example, power steering systems have progressed from purely …

Axial Piston Pump

The Type V40M-028H axial piston pump is suitable for hydraulic fan controls in mobile machines. The pump will displace volumes up to 28 cm3/rev and is designed …

When to Replace a Pump

A frequent question in fluid power is “When should I replace my pump?” The answer is “It depends.” It depends on a multitude of factors, conditions, …

Vacuum Valves

Click images to enlarge The most common form of vacuum generation is a vacuum venturi, often referred to as a “vacuum pump.” This can be misleading because …

Pump or Venturi?

When a salesperson is quoting a vacuum installation, a common question to the end user is, “Would you prefer a vacuum pump or venturi?” More often …

Mid-Pressure Range Pump

The V40M axial piston pump has been designed for open circuits in mobile machines and has a displacement volume of 2.75 in.3/rev. Its swash plate design allows …

Energy-Efficient Hydraulics: Variable Frequency Drives as Pump Prime Movers

It is obvious what we want to achieve with variable speed pumps: to save energy and reduce noise and possibly increase the power density of hydraulics. To …

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