Lowara ZN855-04-3R Stainless Steel 18.5kW Deep Well 8" Submersible Bore Pump with Semi-Axial Flow Impeller

Material construction features based on high-grade cast alloys define this four-stage 8-inch submersible electric pump. It provides a solution for large-scale agricultural and industrial water extraction from deep underground sources to surface distribution points. The unit supports vertical well mounting or horizontal deployment in distribution networks where the motor is at the lowest position. This model serves as an efficient tool for municipal water systems and irrigation projects needing high lift.

Technical performance parameters include a maximum head of 107.8 m and peak delivery rates of 1333 L/Min through its its 125 mm discharge outlet. Electrical power is delivered by an 18.5 kW motor drawing 38.5 Amps of rated current from a 415v three-phase supply. Efficiency is maintained at a rotation speed of 2900 rpm through precisely engineered hydraulic geometry. All performance data is validated for liquids with standard density and kinematic viscosity.

The wet end is constructed from cast AISI 316 Stainless Steel for wetted parts including the suction support, delivery casing, and diffusers. This variant features a Duplex Stainless Steel motor, providing durability in aggressive water conditions found in deep wells. The assembly processes water containing suspended sand levels up to 100 g/m³ and is rated for temperatures of 25°C. The internal pump shaft is made of duplex stainless steel to resist mechanical stress during rotation.

The unit is rated for an immersion depth of 350 meters and maintains a maximum overall diameter of 198 mm including motor cable protection covers. A built-in non-return valve with a stainless steel spring protects the internal components from backflow and mechanical surges. Internal wear surfaces are managed by technopolymer POM-C wear rings and EPDM 70 bearing bushes to ensure shaft alignment. The pump is designed for continuous duty cycles in municipal infrastructure.

Features

• EPDM 70 bearing bushes support the pump shaft assembly and handle mechanical loads during rotation.
• A duplex stainless steel taperlock system secures the impellers to the shaft for torque transfer.
• Internal technopolymer POM-C wear rings maintain hydraulic clearances and reduce internal friction.
• Mechanical connection of the 8-inch motor follows NEMA standards for industrial system compatibility.
• Stainless steel cable covers provide mechanical protection for motor power leads along the casing.
• The integrated non-return valve features a stainless steel spring to prevent fluid backflow.
• A stainless steel suction strainer excludes large particles from entering the hydraulic stages.