Hydraulics

he new Cylindrical Tie Rod (CDT4) Series of NFPA hydraulic cylinders from Bosch Rexroth, Bethlehem, Pa. (www.boschrexroth.com), relies on a single, removable rod bearing made of ductile iron to keep things moving, reduce wear, and extend the cylinder's service life.

Off-the-shelf electrodeposited-nickel bellows replace costly and stroke-limited custom bellows in gas-turbine fuel-control valves.

The right fluid-power system eases large material-handling applications.

A common problem in ball valves is a misaligned actuator.

Up to 90% of all hydraulic system failures can be attributed to contaminated oil, says hydraulic component maker Muncie Power Products, Muncie, Ind.

Putting a regenerative hydraulic circuit on a double-acting piston reroutes the flow exiting the rod side of the cylinder from the reservoir to the piston side of the cylinder.

The volume of fluid in hydraulic reservoirs changes due to heat and system operations.

Things aren't black and white when choosing a servo or proportional valve.

Manipulating the principles of choked flow can simplify valve design.

Inflatable seals are not simple rubber
extrusions.

Environmental, cost, and safety issues are making leak-free hydraulics critical.

A
drive that raised and lowered mixing bowls in drug-processing labs carried a
contamination risk due to its use of hydraulics.

An
intracardiac blood pump designed to take over for the heart during bypass surgery
will use a rotor made from a brand of PEEK (polyaryletherketone) from Victrex
USA Inc.

A new catalog on Ambush squeeze
bushings includes sizing guidelines and
a selection chart.

Type MCR low-speed/high-torque motors can be used when
torque generation is required in
a compact package.