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Sauer-Danfoss' new cartridge valve coil.

Sauer-Danfoss has introduced a new valve coil that the Ames, Iowa, company said is expected to help mobile off-highway equipment manufacturers increase service intervals and overall machine life.

The new Sauer-Danfoss coil is specifically designed for the off-highway equipment environment and is able to tolerate high temperatures and voltage extremes, as well as fluid ingression due to power spray or submersion in water, mud or snow, the company said. Targeted applications include asphalt machinery, agricultural equipment with chemical and power-wash exposure, and snow plows and salt-spreading machines.

The coil is designed with a protective layer of encapsulated plastic with a solid metal frame around it. A special molding technique prevents moisture build-up while the plastic is applied, and because the metal cover is placed outside the plastic, the coil resists even dramatic temperature changes, Sauer-Danfoss said.

The company added that the design process results in a high level of chemical and environmental resistance. An O-ring seal, for example, is unnecessary. Also, the coil has passed a range of environmental tests, including a high-pressure spray test, a shock and vibration test, a thermal shock and dunk test, a salt fog test, a chemical spray test, and a combined temperature, humidity and voltage test.

The new coil has an IP69K environmental protection rating and a -40[degrees] to 160[degrees]F ambient temperature rating for continuous-duty operation. Finally, the input voltage tolerance spans from 75 to 133% of nominal.

"Designing this coil, we wanted to target applications that operate under conditions that are particularly demanding for the components," said Dave Wohlsdorf, product portfolio manager. "Some agricultural and road maintenance applications experience downtime because the components used are not always designed to handle exposure to water, chemicals, excessive temperatures, continuous vibrations and so on.

"Our coil may not be the most noticeable part of an application, but it does a very important job. It helps prevent vehicle downtime, thereby saving time and money for OEMs and end users alike."

Featuring a compact design, Sauer-Danfoss said the coil's size leaves more space for other components on the application. The design makes it possible to fit the cartridge valves closer together in the vehicle's hydraulic integrated circuit blocks. For the OEM, this means reduced installation time and added design flexibility, Wohlsdorf said.

The coil is available with three different electrical connectors: Deutsch DT04-2P, Metri-Pak 150 Series Type 1 and 18 in. lead wires. All connectors are available with optional integral diodes, and the finished coils are color coded for voltage identification.

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Publication:Diesel Progress North American Edition
Date:Jun 1, 2006
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