The hydraulic cylinders and system in the barrage are used to raise or lower the sluice gates. The sluice gates control the water level of the bay and allow water to leave the bay when the water level is higher than average.

Hydraulics

The sluice gates are set up as shown:

Each gate leaf is raised and lowered by a pair of single acting hydraulic cylinders. The hydraulic cylinders are linked electronically in order that the pairs of cylinders travel at identical rates.

The cylinders, one on either side of the gates, are bolted onto a horizontal steel beam, which is bolted into a concrete structure.

The rod end of the hydraulic cylinders that raise and lower the upper gate leaves have double extension stub shafts.

The cylinders for the lower gate leaf are attached via a bearing.

Hydraulically operated latches are incorporated into the gate recesses to support both upper and lower gate leaves in the maintenance-raised position.

Temposonics are used to sensor and maintain the level of the hydraulic oil.

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