Davey D120G Cast Iron Heavy Duty Shredding Ring Submersible Grinder Pump for Sump Emptying with Open Impeller

Engineered for high-head discharge in residential and commercial sewage systems, the Davey D120G utilizes a robust 1.2 kW motor to move waste water through demanding elevations. This manual grinder pump is specifically tailored for conventional sewage disposal where waste must be shredded into a slurry before entering the main sewer lines. By utilizing a heavy-duty cast iron body and high chromium steel grinding components, the assembly provides a stable and durable foundation for sub-surface operation. It is particularly suited for sites requiring connection to pressurized discharge systems.

Generating a maximum flow of 180 L/Min and reaching a max total head of 22.5 metres, the unit provides significant hydraulic pressure for large volume effluent transfer. The 1.2 kW single-phase motor operates on a standard 240v supply with a rated full load current of 10.0 Amps. This performance profile is designed to maintain consistent flow rates even when processing thick organic solids or textiles in suspension. The 2900rpm motor speed ensures that the shredding mechanism remains effective throughout the pumping cycle.

The internal hydraulic behavior is centered on a high chromium steel shredding ring at the inlet that works with an open centrifugal impeller to process waste. This configuration allows the pump to manage grey and black water containing up to 20% soft organic solids, preventing the blockages typically seen in standard sump pumps. The centrifugal design minimizes internal vibration and wear, extending the functional life of the rotating assembly. This ensures that the macerated slurry is transported efficiently through the 1 1/4" BSP F outlet.

Operational security is reinforced by a double mechanical shaft seal in an oil bath and a sand slinger lip seal for added protection. The motor shell and shaft are manufactured from 304 stainless steel to resist corrosion while submerged in aggressive liquids. For professional installation, the unit includes a 10-metre HO7RN-F oil-resistant lead and a seal sensor lead for connection to a protection relay (except where noted). The assembly is fully repairable and designed for low-maintenance service in demanding sewage applications.

FEATURES

• Robust 1.2 kW single-phase motor provides high head performance for commercial sewage disposal.
• High chromium steel shredding and grinding ring at the inlet prevents blockages by macerating solids.
• Double mechanical shaft seal with hard-faced silicon carbide faces ensures maximum motor protection.
• Open centrifugal impeller design supports the passage of shredded slurry through pressurized mains.
• Corrosive resistant 304 stainless steel motor shell and fasteners for lasting structural integrity.
• Integrated seal sensor leads allow for connection to a protection relay for early fault detection.
• HO7RN-F 10 metre oil-resistant power lead provides a durable connection in submerged environments.