The ACU-DRUM rotating drum system is a sediment flushing device designed to remove debris deposited in stormwater holding tanks, combined sewer overflow (CSO) holding tanks, sanitary sewer overflow (SSO) equalization tanks and tank bottoms, using a single flush. It has been used in CSO and SSO applications and can be used in agricultural and industrial applications to clean any reservoir, tank or batch-processing tank.

The system works by releasing a torrent of water stored in the rotating drum. The resulting flushing wave progresses along the entire length of the flushing path, pushing the debris deposited in front of it. The re-suspended debris is then transported by the flushing water to the treatment plant for disposal.

The rotating drum system offers several advantages over other types of sediment flushing devices. Although similar in design to the ACU-TIP tilting bucket, the ACU-DRUM drum differs in that it is designed to use in-situ water for flushing. This sediment flushing device is installed at ground level in the tank. The system's only mechanical components are two permanently lubricated end bearings and the trigger mechanism. As a result, the need for maintenance is reduced, ensuring trouble-free, economical operation. The ACU-DRUM rotating drum can be installed in new tanks or easily retrofitted to existing installations. The following components are included in the ACU-DRUM rotating drum system: rotating drum, supports, bearings, anchoring system, float and release mechanism.

-Flushes even if only partially full

-Permanently lubricated bearings

-Operates without external power

-No structural modifications required

-No fresh water supply required

-Économique et facile à installer

-Easy to adapt to existing installations

-Stainless steel construction

The ACU-DRUM rotating drum may vary from the GAD-60 to the GAD-200. The GAD-60 can hold 60 gallons per foot (750 L/m) of fixture length, and the GAD-200 can hold 200 gallons per foot (2,500 L/m) of fixture length. ACU-DRUM model selection is based on the length of the flush pipe and the slope of the tank bottom. To date, the maximum flush length is 120 feet (36 m).

The unique design of the ACU-DRUM Rotating drum allows it to be filled with water in situ, and is available as a self-filling or external-filling model.

The self-filling model normally stays in the rinse position and has two built-in floats. These floats lift the sediment rinse device up and fill it with water as the tank fills. A float in the sump rises with the water level in the tank and activates the ratchet lock mechanism.

The externally-filled model is designed to remain in a locked, upright position thanks to the use of integrated counterweights, and is filled via a hose. Incoming water is first diverted to the ACU-DRUM Rotating drum before filling the tank.

In both cases, when the water level in the reservoir drops, a float in the sump activates the flush mechanism. The sediment flushing device pivots, sending the stored water to the bottom of the reservoir, causing a torrent of water to flow along the flushing path, scouring any debris deposited from the bottom of the reservoir.

The ACU-DRUM's flush sequence can also be controlled by an electronic trigger mechanism, or hydraulically if you prefer the float-operated mechanism.