Description
Dewater utility vaults, manholes, and construction trenches automatically without external control panels. The Tsurumi LB-480A Electric Single Phase dewatering pump delivers automated water removal. An integrated solid-state electrode sensor activates pump cycles upon liquid contact. The 0.24-inch solids clearance stops passage of crushed stone and coarse construction gravel.
Solid aluminum alloy forms the motor casing, protected by a resilient synthetic rubber outer casing. A semi-vortex urethane rubber impeller resists abrasive scoring from concrete grit. Dual silicon carbide mechanical seals run inside an oil lifter chamber to survive dry running. The electrode level sensor starts the pump when water touches the stainless steel probe. Top-discharge geometry cools motor windings.
Electrode Sensing System Specs
Restoration crews clear groundwater without manual switch monitoring. The solid-state electronic sensor starts the motor when water touches the stainless probe.
- Continuous-duty 0.67-horsepower motor operates on standard single-phase 115-volt utility power
- Semi-vortex urethane impeller delivers 58 GPM maximum water discharge volume
- Solid-state electronic level sensor starts and stops pumping without mechanical floats
- Internal oil lifter lubricates mechanical seals during shallow low-water conditions
- Silicon carbide mechanical faces resist abrasive wear from suspended silica sand
- Heavy 32-foot rubber power cord includes strain relief to prevent electrical shorts
- Standard 2-inch discharge fitting connects straight to commercial lay-flat hose
Hydrodynamic Dyno Load Telemetry
Dynamometer bench testing demonstrates the motor draws 6.1 Amps across 115-volt power under a 20-foot dynamic discharge head. Pump output stabilizes at 44 GPM through 50 feet of 2-inch hose. Motor stator temperature reaches 140°F during extended low-water operation. Acoustic sensors record 56 dBA submerged and 63 dBA in open air.
Worksite Performance Practical Notes
You lower this pump down utility trenches using a steel cable connected to the handle. The compact cylindrical frame fits into narrow 8-inch drainage basins. Do not pick up or move this machine by the rubber power cable. Yanking the electrical cord pulls wires from internal terminals and causes electrical shocks.
- Clean the stainless steel electrode probe with a scour pad to maintain electrical sensitivity
- Check seal chamber lubricating oil clarity through the inspection port once a year
- Rinse the pump volute with fresh water after pumping acidic water or slurry
Certified Warranty Manifest Terms
Tsurumi covers this electronic dewatering pump with a 2-Year limited warranty against manufacturing defects. The factory crate contains the submersible pump, integrated electrode sensor, 32-foot power cable, 2-inch discharge adapter, and comprehensive operational guide.
