Fluid Power Journal

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 …

Analysis of a Hydraulic Oil Failure

I recently conducted failure analysis and a reliability audit on a 300-kilowatt (400-hp) hydrostatic transmission. This hydraulic system was running a …

Fluid Power Journal is the official publication of the International Fluid Power Society

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