Order for six set stormwater drainage pumps for the Yuen Long Barrage Pumping Station of the Drainage Services Department of the Hong Kong Special Administrative Region Government [Orders Received in January 2024]

Torishima’s consolidated subsidiary, TORISHIMA (HONG KONG) LIMITED, has secured an order for six set stormwater drainage pumps for the Yuen Long Barrage Pumping Station, which is to be constructed in the Yuen Long urban area, from the Drainage Services Department (DSD) of the Hong Kong Special Administrative Region Government. DSD is responsible for the overall management of rivers and sewerage in Hong Kong. The design drainage capacity of this pumping station is 300 m3/s.

In recent years, abnormal weather patterns due to climate change have become more frequent, and the relatively flat terrain of Yuen Long has heightened the risk of flooding during high tides and heavy rainstorms. Therefore, the barrage drainage scheme, which includes the construction of this pumping station, has been initiated. This scheme involves installing tidal barriers in rivers to prevent tidal backflow, and the stormwater from upstream will be forcibly drained downstream by this pumping station to prevent flooding in the Yuen Long urban area.

This order was secured by actively making the technical proposals bespoke to the customer’s specifications, such as developing new high-specific speed pump hydraulics, optimizing the flow path through CFD analysis, and proposing a siphon discharge flow channel to eliminate the need for the discharge and non-return valves, thereby simplifying the system and improving maintainability. These efforts, along with our pump supply and construction record in Hong Kong, including previous DSD projects, were highly valued by the customer.

The ordered pumps will be the largest diameter stormwater drainage pumps in Torishima’s history at 4,000 mm, driven by the variable speed motor via the gearbox. The design phase has already begun, aiming at completion in 2027, followed by manufacturing, model testing, actual assembly, local installation, and trial operation. Once completed and being operational, these pumps are expected to contribute significantly to create a safe and secure living environment for local residents.