Tsurumi 40PUW2.25S Stainless Steel Auto-Alternation Submersible Pump for Sewage Pumping with Vortex Impeller

Automating domestic sewage management with dual-pump redundancy requires a technical solution that combines auto-alternation control with high chemical resistance. This auto-alternation submersible vortex pump features automatic operation for coordinated duty-sharing, making it ideal for domestic sumps where redundancy is required. Its corrosion-resistant frame ensures long-term integrity in environments that would degrade conventional iron pumps.

Powered by a 0.25 kW / 240v single-phase capacitor-run motor, the system manages a maximum flow capacity of approximately 210 L/Min and reaches a peak head of approximately 6.6 m. The auto-alternation control circuitry allows for dual-pump coordination, providing start and stop based on liquid level. This motor is continuous-duty rated, providing stable discharge pressure for residential and light commercial sewage systems.

The hydraulic behavior is dictated by a vortex impeller that creates a centrifugal flow path, allowing 35 mm solids to bypass the vanes. This recessed configuration significantly reduces erosive wear by minimizing mechanical contact between suspended particles and the hydraulic components. The whirlpool effect ensures the pump remains unchokable even when managing high concentrations of site debris in redundant automated cycles.

Mechanical integrity is supported by a 304 stainless steel and resin body, with a 304 stainless steel shaft for enhanced chemical compatibility. Sealing is provided by a double-face mechanical seal located in an oil chamber featuring a proprietary Oil Lifter. Protection is reinforced by a miniature thermal protector embedded in the motor windings and an anti-wicking cable entry block that safeguards the motor from moisture.

FEATURES

• Auto-alternation control facilitates coordinated dual-pump operation for redundancy in sewage systems.
• Single-phase 240v capacitor-run motor is designed for easy installation in standard residential power grids and sumps.
• Vortex impeller design facilitates the passage of solids up to 35 mm, preventing clogging in automated sewage systems.
• 304 stainless steel and resin construction provides superior durability and rust resistance in aggressive wastewater.
• Double-face mechanical seal operating in an oil chamber ensures high sealing reliability.
• Proprietary Oil Lifter technology supplies lubricating oil to the seal faces even when oil levels are low.
• Integrated anti-wicking cable entry block protects the motor from moisture incursion even if the power cable is submerged.
• Miniature thermal protector embedded in the motor winding directly cuts the circuit during excessive heat buildup.