Lowara ZN855-05/2A-3S Stainless Steel 22kW Deep Well 8" Submersible Bore Pump with Semi-Axial Flow Impeller

Installation variability characterises this 8-inch range submersible pump, which supports both vertical deep-well mounting and horizontal tank deployment. It features a five-stage hydraulic end with dual reduced impellers to match specific head requirements while maintaining large flow capacities. The assembly requires a minimum recommended incline when installed horizontally to ensure motor cooling and hydraulic stability. This configuration serves municipal networks and agricultural systems requiring precise pressure thresholds.

The unit achieves performance characteristics including a maximum head of 123.1 m and peak flow of 1333 L/Min via the 125 mm discharge outlet. Equipped with a 22 kW motor for 415v three-phase power, the unit draws a rated current of 47.3 Amps during operation. The semi-axial flow design achieves high efficiency with a nominal flow rate of 55 m³/hr for water transfer tasks. All metrics are validated for clean water at a rotation speed of 2900 rpm.

Wet end components are fabricated from cast AISI 316 Stainless Steel for wetted parts including the impellers, diffusers, and delivery casing. The motor is also made from 316 Stainless Steel and is rated for contact with liquids up to 25°C. The system handles water with suspended sand levels of 100 g/m³ through its five-stage hydraulic arrangement. A duplex stainless steel shaft and coupling are used to transmit power through the hydraulic end to manage the generated torque.

This electric pump supports immersion depths of 350 meters and features a non-return valve built into the head to prevent fluid backflow. Physical dimensions include a 198 mm maximum overall diameter, fitting within standard 8-inch well casings. Internal clearances are maintained by EPDM 70 bearing bushes and technopolymer wear rings supporting the duplex shaft assembly. This design is intended for heavy-duty industrial extraction and municipal water supply applications.

Features

• A stainless steel suction strainer excludes large particles from entering the hydraulic stages.
• 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.
• A duplex stainless steel taperlock system secures the impellers to the shaft for torque transfer.
• EPDM 70 bearing bushes support the pump shaft assembly and handle mechanical loads during rotation.
• The integrated non-return valve features a stainless steel spring to prevent fluid backflow.
• Stainless steel cable covers provide mechanical protection for motor power leads along the casing.