What's New at RDT?

New Sales Representatives

RDT is expanding! We've hired on new sales representatives to cover a greater area of the United States and are continuing to expand to better serve our customers wherever they reside. Check out our new sales representatives web page to find the sales representative for your area. Click here to find your representative.

Scroll Compressors The Time Has Come RDT and Copeland® are defining the future of scroll in the food service industry. Copeland delivers 14 years of scroll design and manufacturing experience proven in over 15 million scroll compressors successfully installed worldwide. In 1994, Copeland crafted the technical modifications needed to apply scroll to the demands of hundreds of refrigeration applications with its introduction of the Glacier™ scroll. RDT, with over 35 years experience in commercial refrigeration and after extended research and testing, is bringing this technology to the food service industry. How Does the Scroll Work? The scroll-type compressor is conceptually simple. Two spiral-shaped members fit together forming crescent-shaped gas pockets. One member remains stationary, while the second is allowed to orbit relative to the first, drawing gas into the outer pocket and sealing off the open passage. As the spiral movement continues, the gas is forced toward the center of the scroll form, creating increasingly higher gas pressures and discharging the gas from the port of the fixed scroll member at the center of the pocket. Reliable and Quiet Both RDT and Copeland have successfully made design enhancements that increase reliability of the refrigeration system while diminishing noise pollution. Copeland's scroll is designed and built to deliver dependable performance under the most punishing refrigeration conditions. Unlike conventional compressors, which use about 15 parts to create the piston action that compresses the refrigerant gas, the scroll uses only four moving parts. RDT has increased the surface area of its condensers and reduced the fan speed by 33% resulting in less air noise. This results in a more reliable, more durable, quieter compressor rack. What's more, piston compressors require discharge and intake valves that can be damaged by liquid refrigerant. But not the scroll. That's because, thanks to radial compliance, the scroll members separate in the presence of liquid refrigerant or debris, substantially improving durability and reliability, and enabling the scroll to operate more smoothly and quietly, with less vibration.

Cost-effective and Energy Efficient Dollar for dollar, the scroll delivers more system value because of its high efficiency, increased reliability, and quieter operation. This provides a perfect match with RDT's philosophy of high efficiency components. In terms of energy efficiency, the scroll is a high-performance product as well, achieving efficiency ratings that rival those of Copeland's Discus ® semi-hermetic compressor products across the operation range. Considering that the potential for this advanced compressor technology has only just begun to be realized, the scroll is destined to be the compressor of choice for many years to come. By engineering around this technology, RDT is positioning itself to remain the rack manufacturer of choice.