UNiGY PhD Technology Improves Control And Promotes An Energy Efficient Hydraulic System

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Third Generation Drive Controller Reduces Power Consumption by 60% or More

Kadant UNiGY

Kadant AES, a division of Kadant Inc. (NYSE:KAI), a leading global provider of process solutions, introduces the UNiGY® PhD™ system, a significant advance in pump control technology for high-pressure hydraulic power systems. The UNiGY PhD (Pump-modeling hydraulic Drive) creates an energy efficient hydraulic system, dramatically improving process control and system availability of hydraulic power systems and positive displacement pumps used in a variety of industries, including forging, plastic injection molding, and tube bending.

Pump control system produces precise flow rates and pressures

An elegantly simple solution, the exclusive and patented UNiGY pump control system employs intelligent pump control software to produce the precise flow rates and pressures demanded by the application, and no more. The UNiGY pump control system continually senses demand and energizes the pump only as required, significantly lowering energy consumption, waste heat generation, and noise.

Ideal for positive displacement pump applications where flow rates vary

The energy efficient hydraulic system employs a third generation torque regulating drive controller powered by a 100 megahertz digital signal processor (DSP) for faster response time and precise pump control. Utilizing the powerful DSP, UNiGY PhD can incorporate a broader range of hydraulic application tuning parameters and compensate in real time for non-linear conditions like fluid compression, pump slip, fluctuating flow resistance, and windage, as well as viscous and coulomb losses. As a result, the UNiGY PhD can produce desired motion profiles with significantly higher precision than a system employing pressure compensated hydraulic pumps feeding servo-valves.

Energy Efficient Hydraulic System extends system component life by using feed-forward torque control algorithms

For processes where hydraulic demand is intermittent, UNiGY technology can significantly extend hydraulic system component life, depending on the application. The system achieves this by slowing or stopping the pump, such as a positive displacement pump, when reduced flow is required, and by using feed-forward torque control algorithms to eliminate pressure spikes, resulting in fewer hose bursts, fewer leaks, and fewer unscheduled plant outages.

Pump control technology can be easily retrofitted or incorporated into systems

The UNiGY technology can be easily retrofitted into existing systems and incorporated into new installations, creating an energy efficient hydraulic system. UNiGY pump control technology reduces hydraulic system complexity by eliminating the need for pressure compensated pumps, as well as oil cooling circuits, dump valves, servo valves, and associated amplifier cards.

About UNiGY Pump-Control Technology
UNiGY pump-control technology is a patented technology that utilizes pump-modeling software in closed-loop Flux Vector Drives for hydraulic power generation and to monitor and control high pressure positive displacement pumps. Distinct from VFD technology, UNiGY PhD (Pump-modeling hydraulic Drive) TM technology provides precise control of both pressure and flow. Developed under a grant provided by the New York State Energy Research and Development Authority (NYSERDA), UNiGY technology reduces energy use, simplifies system design and provides valuable pump and systems diagnostics which significantly reduces maintenance and downtime expense. Unigy is a registered trademark of Kadant Inc. and available through the Kadant AES Division. For more information, please visit Kadant.

The following constitutes a "Safe Harbor" statement under the Private Securities Litigation Reform Act of 1995: This press release contains forward-looking statements that involve a number of risks and uncertainties, including forward-looking statements about our products and technologies. Important factors that could cause actual results to differ materially from those indicated by such statements are set forth under the heading "Risk Factors" in Kadant's quarterly report on Form 10-K for the period ended December 29, 2007. These include risks and uncertainties relating to our dependence on the pulp and paper industry; significance of sales and operation of manufacturing facilities in China; international sales and operations; competition; our debt obligations; restrictions in our credit agreement; future warranty claims associated with the discontinued operation; our acquisition strategy; future restructurings; risks associated with our fiber-based products business; protection of patents and proprietary rights; fluctuations in quarterly operating results; and anti-takeover provisions. We undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future events, or otherwise.

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Nicole Followell

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