Davey D75A Cast Iron Automatic Submersible Pump for Volume Transfer with Open Impeller

Structural reliability in the Davey D75A is anchored by a heavy-duty cast iron pump body and motor top, providing the architectural rigidity required for commercial dewatering. This automatic model incorporates an integrated float switch for large volume water transfer, ensuring unattended operation in pits and ditches prone to flooding. The use of corrosive-resistant 304 stainless steel for the motor shell and fasteners ensures a lasting professional appearance while protecting internal electrical components during prolonged immersion. High-grade materials are chosen specifically to withstand the mechanical stresses of commercial site drainage.

Generating a maximum flow of approximately 420 L/Min, the unit utilizes a 0.75 kW motor to reach a maximum head of 15 metres. This performance is achieved on a standard 240v single-phase supply with a full load current of 7.5 Amps, supporting efficient energy consumption for septic water disposal. The motor is engineered with Class F insulation and an IPX8 rating, providing a low carbon footprint during continuous service cycles. This robust electrical configuration ensures consistent hydraulic behavior when clearing grey water from commercial garages and industrial sumps.

Internal fluid velocity paths are maintained by a cast iron open impeller that facilitates the passage of soft solids in suspension without compromising volumetric efficiency. This centrifugal arrangement is designed to handle up to ten percent soft solids, making it less susceptible to blockages compared to closed impeller designs. The hydraulic heart of the pump is optimized to resist sediment accumulation, ensuring the 50mm discharge port remains clear during high-volume transfer. By utilizing a balanced hydraulic design, the unit reduces internal vibration and wear on the rotating assembly.

Operational longevity is reinforced by a double mechanical shaft seal housed in an oil bath, featuring a silicon carbide/ceramic seal on the pump side for superior abrasive resistance. The assembly is equipped with a sand slinger lip seal and an internal automatic resetting thermal overload to prevent motor failure from overheating. For secure and safe electrical termination, the pump includes a 10-metre HO7RNF oil-resistant lead with a standard 3-pin power plug. The integrated preset length float switch enables fully automatic start and stop functionality based on rising water levels in the pit.

Features

• Integrated automatic float switch enables reliable unattended operation for flood protection.
• Double mechanical shaft seal in an oil bath offers enhanced motor protection and long service life.
• Silicon carbide and ceramic seal faces provide high resistance to wear from suspended particles.
• Heavy duty cast iron pump body and motor top provide superior structural durability for site use.
• Open centrifugal impeller design allows for the passage of soft solids without clogging the pump.
• Internal thermal overload with automatic reset protects the motor from electrical and thermal stress.
• HO7RNF 10 metre oil resistant lead ensures safe electrical connection in dirty water environments.