› No fresh water supply required
› Stainless Steel 316 construction
› Uses simple single acting cylinder
› Low pressure hydraulic operation
› Optional pneumatic operation
› Low operating pressure
› Requires little to no maintenance
Application
The Flushing Gate flushing gate is designed to remove settled debris from retention tank and reservoir floors, as well as sewer inverts, using a single flush. This is accomplished by the sudden release of the in-system water stored behind the flushing gate, released as a single powerful flushing wave. The flushing wave progresses down the entire length of the flushway, pushing the settled debris ahead of it. The re-suspended debris is carried by the flush water to the treatment plant for disposal. The maximum flushing distance is limited only by the amount of water stored behind the gate and the slope of the flushway.
The Flushing Gate is normally in the closed or latched position. It is only pressurized or opened when flushing is required. The Flushing Gate cylinder is housed completely within the gate frame limits, thereby not requiring additional side clearance and reducing the likelihood of debris accumulation.
The Flushing Gate operates using a single acting hydraulic cylinder controlled by a low pressure (200 psi) hydraulic power unit. The Flushing Gate can also be operated using an optional pneumatic cylinder (<85 psi) where compressed air is available or preferred.
Operation
During a storm event the tank or sewer fills with excess water. This excess water also fills the storage area (or flushing chamber) behind the Flushing Gate. After the event subsides and the tank or sewer is drained, the Flushing Gate is ready to operate. Using electronic signals, activated by the water level, the hydraulic power unit pressurizes the gate cylinder, thereby causing the latches to rotate to the open position. When the flushing chamber behind the gate is filled with water, the resulting hydrostatic pressure causes the Flushing Gate to open. This results in the release of a torrent of water which runs down the length of the flushway scouring all settled debris from the tank floor or sewer invert. Once the flushing chamber behind the Flushing Gate has emptied, the gate then returns to its normal vertical position. At this point the hydraulic power unit is shut off and the single acting cylinder returns to its latched position thereby securing the gate shut. The Flushing Gate is now ready for the next event. The Flushing Gate can also be operated using the water levels within the system with the use of a float, thereby requiring no external energy supply.
