xxx 2011-03-22

Break Through for TIER 4 Compatible Control Valves

Break Through for TIER 4 Compatible Control Valves

With their ML-18 Rexroth sets a new standard for energy efficient pressure compensated load-sensing control valves. The ML-18 design was focused on reducing power consumption on new TIER 4 applications such as skid steers, small wheel loaders and material handlers. In applications requiring up to 40 gpm (151 lpm) at 4000 psi (276 bar), the ML-18 can reduce pressure drops as much as 50 percent versus the competitors, therefore setting a new industry standard for reduced hydraulic power consumption.

The key features that enable such savings are the monoblock design which reduces the interface restrictions between sections, dedicated tank coring for the highest flow section and the use of backpressure valving for forced flow regenerating. To achieve these features Rexroth has employed sophisticated computer modeling to optimize the internal flow passages of the valve which creates optimal flow geometry, while at the same time minimizing the overall package size. The ML-18 architecture was developed so that OEM’s could choose electro-hydraulic as well as pilot operation for spool modulation, giving the ML-18 the flexibility to meet the control system of choice depending on the equipment requirements. While the base configuration for the ML-18 is a 3 spool mono-block design, it was developed so that the Rexroth M4 series sectional valves could be added to the end of the mono-block to give OEMs the required flexibility to optimize configurations as required in meeting their specific needs.

Bosch Rexroth AG is one of the world’s leading specialists in the field of drive and control technologies. Under the brand name of Rexroth, the company supplies more than 500,000 customers with tailored solutions for driving, controlling and moving. Bosch Rexroth is a partner for industrial applications and factory automation, mobile applications and renewable energy.

As The Drive & Control Company, Bosch Rexroth develops, produces, and sells components and systems in more than 80 countries. In 2009 Bosch Rexroth, part of the Bosch Group, achieved sales of around $5.7 billion (4.1 billion Euro) with 34,200 employees. For more information, please visit:


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