Close-up of large industrial pipes with water cascading through a metal mesh structure. The pipes, carrying wastewater, are supported by a network of cables, creating a complex yet organized arrangement.

Drive Unit Assembly

Brentwood supplies drive units that are custom configured for each collector based on system requirements and regional and environmental conditions. Each system utilizes a motor and gear reducer and optional components such as overtorque protection to prevent drive system failure, a drive chain tightener to maintain tension, and a chain guard to protect rotating equipment above the deck.

A blue motorized mechanical device, known as a drive unit assembly, is mounted on a concrete surface with bolts. It connects to a chain and sprocket system adjacent to a metal frame.

Features

Custom-designed for your application

Complements Polychem drive chain

Easy-to-reset torque limiter available

Navigate Within Polychem® Systems

Drive Unit Assembly Products

Close-up of a Polychem® NH-78 Drive Chain with thick, interconnected links and visible metal pins at the joints, designed for heavy-duty machinery or conveyor systems.

Polychem^® NH-78 Drive Chain

Polychem^® Torque Limiter

Specifications (Drive Chain)

English Metric

Series	Pitch inches	Average Weight Per Ft lbs	Working Load Lbs-f	Pin Diameter inches	Link Material	Pin Material
NH-78	2.609	1.25	1740	0.375	GLASS REINFORCED NYLON	303 SS

Series	Pitch mm	Average Weight Per Ft kg	Working Load Kn	Pin Diameter mm	Link Material	Pin Material
NH-78	66.27	0.57	7.74	9.5	GLASS REINFORCED NYLON	303 SS

Specifications (Overtorque Protection)

Product	Part Number	Type	Externally Adjustable Torque Range Lbs/in	Min. Rockwell Hardness	Min. Nh-78 Sprocket
Torque Limiter	JSE1-0150		2,024-9,287	62 R/C	11 Teeth

Specifications table not found.

A close-up view of industrial machinery with cogwheels, head shafts, and a chain, all shown in a blue-tinted color scheme.

System Animation

Learn how all the components in a standard Polychem system are assembled and installed.

Articles & Literature

Rectangular clarifier systems

Rectangular vs. Circular Clarifiers: What is the Best Option?

Clarifiers are crucial in water and wastewater treatment processes as they help separate solid particles from liquids. However, selecting the right type of clarifier can be a daunting task. This article will compare the two most commonly used clarifier shapes, rectangular and circular, to help you decide which is best for your application.

Literature

Polychem Chain & Flight Brochure Polychem Field Services

Water & Wastewater Treatment Products

an image showing three head shafts

Head Shafts

Two dark steel chamfer-style weights with cylindrical tops and wider, tapering bases resemble stub shafts. The weights are uniform in color with a smooth, matte surface finish.

Stub Shafts

an image showing a close up of a sprocket for PolyChem Systems

Sprockets

Close-up view of multiple metal channel sections, displayed in varying angles. The channels, likely made of steel or aluminum, exhibit smooth, reflective surfaces and sharp, clean edges

Flights

an image of a close up featuring an overview of a collector chain

Collector Chain

A close-up of water flowing over a weir at a wastewater treatment plant. The image shows sediment and debris, part of the scum removal process, on the water surface as it moves over a red and brown barrier before falling into a lower section. The structure is surrounded by concrete.

Scum Removal

A shield emblem with the letters "SG" is at the center of the image. "SMARTGUARD" stands out in large, bold letters, while "COLLECTOR MONITORING SYSTEM" appears in smaller text beneath it. The background features a wavy, abstract pattern in dark and light shades.

SmartGuard®

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Field Services

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