NETZSCH is expanding its product range with several new sizes of the N.Mac® twin shaft grinder for flow rates of up to 400 cubic meters per hour (m3/h).

The N.Mac twin shaft grinder from Netzsch is available with a channel or inline housing. The versatile grinder is now available in further sizes for flow rates up to 400 m3/h. The N.Mac is designed to break down a variety of materials and is ideal for wastewater treatment, biogas and biomass plants, food and animal processing, and many other waste and industrial applications, according to Netzsch.

The new grinder can be installed upstream of a pump (inline version) or above the feeding screw of a hopper pump (channel version) or in any effluent channel. The inline version of the N.Mac is available in three sizes and can handle a maximum flow rate of up to 350 m3/h. The channel version of this grinder is available in four sizes, designed for a maximum flow rate of up to 400 m3/h.

For applications with even higher flow rates, several grinders can be run in parallel, also allowing parts of the system to be serviced while in operation. According to Netzsch, installation of several grinders in sequence allows a gradual reduction of the particle size.

Besides knives that can be removed in a cartridge for quick and easy maintenance, the N.Mac is equipped with flushed and lubricated mechanical seals for perfect dry-running capability. The cartridge version of the mechanical seal, a leak-free combination of mechanical seal and cartridge housing, can be serviced and replaced quickly and easily, said the firm. An optional control panel allows the automatic reversal of the running direction to release stuck media.

The new grinder features modular assemblies and replaceable components allowing all parts to be serviced and maintained without restrictions.

Versions with up to six cutting cartridges per shaft are available. The cartridges are pre-assembled and delivered with spacers and knives already positioned for easy installations, according to Netzsch. Different materials can be selected depending on the application.

The cycloidal gearboxes are maintenance-free for up to two years. The grinder is also supplied with different cutting tool sizes for different shaft speeds as a standard to optimize the gripping and the cutting process.

Accessories include a control panel for guaranteed operation and system safety, a cutting cartridge cleaner for a permanently clear-cutting chamber and unrestricted flow of liquid, and a drive shaft extension to elevate the electric motor above the liquid level.