A modular grinding solution

A modular grinding solution
NETZSCH Pumps North America offers the N.Mac Twin Shaft Grinder

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Because today’s waste streams are filled with wipes and other stringy solids, strong grinders are an essential part of most treatment plant headworks. These grinders can often be expensive and difficult to maintain, though. NETZSCH Pumps North America offers the N.Mac Twin Shaft Grinder to ease those concerns.

The N.Mac is built with modular assemblies and interchangeable components that facilitate universal parts servicing. According to Jeffrey Bye, director of customer service, engineering, and projects for NETZSCH Pumps North America, those features came at the request of customers.

“We benchmarked the competitor’s products and then made improvements on those basic designs,” he says. “We developed our grinders to have modular cartridges that are easy to work on for simple, fast servicing.”

The N.Mac is designed to fragment a variety of materials and is ideal for wastewater treatment. Available in both channel and inline (flanged) housing construction, the N.Mac can be installed into effluent channels or upstream from a pump.

“These grinders are employed on the influent side of wastewater treatment plants and in pump stations to grind debris before entering the pumping process,” Bye says. “They can also be used for accepting and processing at biosolids and FOG stations.”

They offer quenched lubricated mechanical seals for dry running capability. For higher flow applications, the grinders can operate in parallel, enabling partial servicing while in operation. For convenience, they can be mounted upstream before the pump (inline model) or on top of the auger (channel model). They can also be stacked for successive particle size reduction. An optional control panel is equipped with an autoreverse feature to retract jammed media. Dual recessed and self-collapsing lifting tabs make pullout for servicing simple.

Models feature from one to six cutter cartridges per shaft. Cartridges come preassembled with worry-free, prestacked spacers and blades, and they are available in different materials depending on the application. The cycloidal gearbox is maintenance-free for up to two years. The grinder comes standard with different cutting gear sizes for different shaft speeds, resulting in better grabbing and grinding. The unit officially launched in North America in fall 2017, but it has been in service in Brazil for two years.

“There has been very positive acceptance to this product,” Bye says. “We are seeing very high customer satisfaction in current field installations.” 610-363-8010; www.pumps.netzsch.com



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