Hydraulic Valves

Tandem pumps power street sweeper

Sat, 11 May 2013 21:00:00 +0000

Modern street sweepers offer improved hydraulic efficiency and reliability.

Today's street sweepers offer improved hydraulic efficiency and reliability over those of even a few years ago.

Sauer-Danfoss earns certification for designing safe software

Mon, 15 Apr 2013 15:49:00 +0000

Sauer-Danfoss has become the first company to achieve TÜV-Nord certification of process quality to simplify functional safety software project management.

Last week, Sauer-Danfoss, Ames, Iowa, announced that it has become the first company to achieve TÜV-Nord certification of process quality, with Software PDLP development process, which simplifies functional safety software project management.

HAWE Hydraulics acquires Pacific Fluid Systems

Mon, 15 Apr 2013 14:30:00 +0000

Hydraulic pump and valve manufacturer HAWE Hydraulics Inc. has acquired Pacific Fluid Systems, a provider of hydraulic solutions.

HAWE Hydraulics Inc., Charlotte, N.C., has acquired Pacific Fluid Systems, Portland, Ore. The deal will strengthen HAWE's North American presence, as the Munich, Germany-based company moves to strengthen its market share in the U.S. and Canada.

The Old Timer Part 18: Avoid unwanted intensification

Fri, 12 Apr 2013 20:54:00 +0000

Most hydraulics courses include an example to illustrate an intensification problem that occurs when holding vertical loads with a cylinder. A blocked-center directional control valve stops the cylinder in mid-stroke.

The Hitch Post

Locking valves cause pole in circus act to drift

Thu, 11 Apr 2013 20:05:00 +0000

By Robert J. Sheaf, Jr.

In the latest Troubleshooting Challenge, Robert Sheaf poses a question as to why locking valves that control a hydraulic cylinder are drifting in a circus clown act.

During a circus act, a clown balances on a platform resting on the end of a 60-ft pole. The platform has a double rail on all four sides, and the top rail is about waist high. The clown acts like he is trying to cause the pole to sway back and forth, which causes it to break loose and drop to about 30 ft above an open cage holding tigers and lions.

Solenoid troubleshooting checklist

Mon, 08 Apr 2013 17:49:00 +0000

Free brochure from Detroit Coil Co. describes the most common causes of solenoid failure and tips to prevent it.

When a solenoid is first energized, its coil receives a pulse of high inrush current that decreases as the plunger closes. If the plunger does not close, the high inrush current continues, which can cause the coil to overheat and burn out. This is the most common cause of solenoid failure and spotting it is easy.

Counterbalance valves

Thu, 28 Mar 2013 20:18:00 +0000

Updated portfolio of counterbalance valves includes re-introduction of VCB product line, which pilots on port 1 (nose of the valve), allowing for a slimmer dual counterbalance design. Four sizes are rated for 350 bar (5075 psi). Updated 20 size CB20-HV is the company’s largest hydraulically vented cartridge valve and is capable of 266 lpm (70 gpm). Pre-engineered dual-counterbalance HICs of each valve are also being introduced. They are also rated for 350 bar (5075 psi).

Solenoid valves

Mon, 11 Mar 2013 15:32:00 +0000

HSV high-pressure solenoid valves offer high power density and long life. Available in 2-way poppet and spool designs in standard -10 size cavity and -12, -16 and -20 size cavity poppet designs. They are rated for pressures to 350 bar and feature high flow capacities for each size.

Steering valves keep speed boats on course

Wed, 06 Mar 2013 18:16:00 +0000

Go-fast boats typically can rip through calm seas at 80 knots or more. Built with a deep V fiberglass hull, these racing boats usually run 30 to 50 ft long and have a narrow beam (width, for you landlubbers) for minimal drag. Oh, and they may be powered by twin engines of 500 hp — that’s each, not in total.