At Thailand's Khlong Sam Dong Pumping Station, LEO mounted QGZN Series Submersible Flow Pumps on modified gates to strengthen local flood drainage. The tailored retrofit reused existing infrastructure and avoided the need for a new pump house and complex intake channels. Compared with a conventional vertical axial-flow pumping station, LEO's approved project comparison showed 10%–15% higher equipment operating efficiency, 35% lower civil-works investment, and a construction program shortened from 6–8 months to 2–3 months.

The station serves a low-lying area where high canal levels can restrict gravity drainage after heavy rain, affecting farming and daily life. By adding dependable mechanical drainage within the existing site, the project addressed the need to discharge accumulated rainwater without replacing the existing gate infrastructure.

Existing Gates Become a Practical Drainage Upgrade

LEO mounted the QGZN pumps directly on modified gates at Khlong Sam Dong Pumping Station. The resulting gate-mounted arrangement added forced drainage where gravity discharge alone was insufficient during high canal levels.

This approach focused construction on adapting the existing gates and integrating the pumping equipment. Reusing the available structures reduced the amount of new civil infrastructure required while creating a practical route to stronger drainage capacity.

QGZN Pumps Match High-Flow, Low-Head Conditions

The installed 1000QGZN-125 pumps are designed for high-flow, low-head water-supply and drainage duties. Each pump and motor form a compact, directly coupled submersible unit, supporting installation within the modified gate structure.

The QGZN wet-stator design uses water-resistant motor insulation and is engineered to reduce seal-failure risk in submerged operation. Overtemperature, overload and water-ingress protection help the pump units respond to abnormal conditions and support reliable operation in a drainage waterway.

Centralized Control Brings Pump Operation into One View

Smart control panels centralize pump monitoring and control, giving operators a clearer view of pump status.

Combined with the protection built into the pumps, centralized control supports faster awareness of abnormal conditions and more structured management of the drainage assets.

Lower Civil Works and a Shorter Construction Program

Reusing the gates changed more than the equipment layout. It reduced the amount of new construction needed to create effective pumping capacity.

For owners and contractors, the comparison highlights a practical design principle: pump selection, installation structure and civil works should be evaluated as one system. At Khlong Sam Dong, adapting the existing gates reduced new construction requirements and supported a shorter project schedule.

Stronger Flood Drainage for Riverside Communities

Since commissioning, Khlong Sam Dong Pumping Station has improved local flood-drainage capacity, helped reduce flooding risk during heavy rainfall and strengthened protection for nearby riverside communities. The outcome is important for both agricultural activity and daily life in the surrounding low-lying area.

The project demonstrates LEO's ability to connect pump technology with existing structures, installation constraints and operating requirements. For Khlong Sam Dong, LEO adapted the pumping arrangement to the existing gate structures and the project's drainage and control requirements.

Talk to LEO about a flood-control and drainage solution tailored to your site conditions, hydraulic requirements and project goals.