Hydraulic Filters: How to Compare Apples to Oranges

Filter used on a filter cartOne of our readers wrote me this question:

“We are evaluating filters for a contract and I had the suppliers give me the Beta ratios for the elements they propose to supply. The problem is one company has given me Beta ratios for 2 and 11 microns, and the other company, 6 and 20 microns, i.e.:

Company A’s filter is … Read more

What Hydraulic Pump Manufacturers Say About Suction Strainers

Photo credit: Stauff CorporationIf you’ve been following my posts here and in other places for any length of time you’ll be aware that I’m a loud and enthusiastic advocate of NOT installing suction strainers, and in the majority of applications, removing and discarding them when they are installed.

And this is why I’m always interested in any new information on this issue, especially … Read more

The Best Type of Hydraulic Piston Motor is…

bent_fix_csBent axis and in-line axial piston motors are both high performance designs featuring high efficiency at high operating pressures. But which is best? To answer this question, a comparison of relative performance advantages is required.

Bent axis designs can be ‘bent’ to angle of up to about 40°. Whereas the swash plate angle on an in-line design is typically limited … Read more