General Information
The Park Macerator Assembly is an “In-Line Grinder” system used on sewage systems, featuring the legendary Muffin Monster® grinder. The unit is recommended for gravity-flow sewer lines which may experience high solid concentrations that could “clog” the sewer piping. Typical applications include detention and correctional institutions, where vandalism is a frequent occurrence. Inmates tend to “stuff” sheets, towels, and shoes down toilets to cause flooding of the building. The macerator grinds up these solids avoiding costly flooding and maintenance.

Operation
The macerator assembly runs continuously to grind up all the sewage that passes through it. A control panel, typically located in a mechanical room, is the “brains” behind the grinder operation. Solids are pulverized with rotating, hardened steel teeth. In the event an object is too hard or massive requiring multiple passes through the grinder, the controller will reverse the grinder and try it again. This sequence is performed multple times until the object is destroyed. If the grinder is presented with objects which cannot be shredded after repeated tries, the controller will shut down the grinder and trigger a service alarm.

Features

• Pre-Engineered design of the total grinder assembly including vault enclosure
• Integral by-pass and isolation valves
• Sump pump to avoid water damage
• Uses dual-shafted technology to reduce solids in standard wastewater and industrial applications
• Utilizes a 3 or 5 horsepower (2.2 or 4 kW) motor with a 29:1 gear reducer
• 2-inch 4140 steel hexagonal shafts
• Varied cutter options to optimize performance and particle size
• Provides protection of downstream pumps and processing equipment
• Features in-line or in-channel cutter stack tightening capabilities

Construction
The macerator assembly vault, manufactured by Park, is constructed of quality precast concrete, Class I 4500 PSI @ 28 days. Precasting the concrete shell insures that all units achieve structural and physical uniformity. The units are structurally engineered for H-20 truck loading (with H-20 cover if specified) and can be buried without any need for any other structural protection. The assembly which consists of pipe, valves, fittings, and a grinder unit is preassembled and installed within an appropriately sized concrete vault enclosure. The assemblies are pretested and inspected to adhere to our strict quality control standards.

Contact Park® on your next design challenge.