Z8

Summary

Product Identification

The Lowara 6Z8 series consists of 8” submersible electric pumps, including models 6Z855, 6Z875, 6Z895, and 6Z8125, designed for 60 Hz operation. An optional 6ZR8 version made of DUPLEX stainless steel is also available.

Applications

These pumps are suitable for:

• Water supply from deep wells.
• Pressure boosting and water distribution in civil and industrial systems.
• Supply of surge tanks and reservoirs.
• Firefighting and washing systems.
• Water level control.
• Irrigation.
• Mining.

Market sectors include AGRICULTURAL and INDUSTRIAL.

Operating Limits

Pump

• Delivery: Up to 210 m³/h.
• Head: Up to 550 m.
• Maximum pump overall diameter (2 cable covers included): 198 mm for all versions.
• Maximum electric pump immersion depth: 350 m with L6W, L8W, L10W motors.
• Maximum permissible quantity of suspended sand: 100 g/m³.
• Standard delivery outlet: Rp 5” for all versions.
• Motor power range: From 5,5 to 150 kW.
• Liquid compatibility: Valid for liquids with density ρ = 1,0 Kg/dm³ and kinematic viscosity υ = 1 mm²/sec.

Motor (L6W, L8W, L10W Series)

• Maximum supply voltage variations: ±10%.
• Horizontal operation: All versions are designed for horizontal installation, provided that the direction of the axial thrust generated by the impellers is always from the pump to the motor.
• Maximum number of starts per hour: 15 (L6W), 10 (L8W), and 8 (L10W).
• Maximum temperature of water in contact with motor: 30°C.

Motor (L6C Series)

• Maximum immersion depth: 250 m.
• Maximum number of starts per hour at regular intervals: 25 for direct start.
• Maximum supply voltage variations allowed: ±10%.
• Maximum water temperature: 35°C (applies to motors working in an installation capable of delivering a flow of water around the motor jacket of at least 0,2 m/s).
• Axial thrust: 16000 N from 4 to 22 kW; 27000 N from 30 to 37 kW.
• Horizontal operation: Can also operate in horizontal position, provided that the associated pump can apply an axial thrust of at least 250 N on the entire operating field.

Mechanical / Hydraulic

Pump Construction

• Robust and lightweight, easy to maintain and corrosion resistant in non-aggressive environments.
• Impellers and diffusers: Made of stainless steel.
• Delivery casing: Made of stainless steel.
• Non-return valve: Made of stainless steel, with integrated spring.
• Suction support: Made of stainless steel.
• Shaft: Made of stainless steel.
• Guide bearing and wear rings ensure high resistance to wear and guarantee constant and long-lasting performance of the hydraulic characteristics.
• Coupling and flange mounting dimensions meet NEMA standards.
• The 6ZR8 version is available in DUPLEX stainless steel.

Motor Construction (L6C Series)

• Outer sleeve: Stainless steel.
• Shaft extension and coupling dimensions: To NEMA standards.
• Compensating bellows for internal liquid expansion.
• Axial load supported by Kingsbury type thrust bearing.
• Mechanical seal protected by sand guard.
• Extractable supply cable fitted with watertight connector.
• Screws included.
• Optional features: Silicon Carbide mechanical seal.

Electrical

Motor (L6W, L8W, L10W Series)

• L6W, L8W, L10W are rewindable three-phase motors with water filled winding.
• Three-phase versions (60 Hz):
  • L6W: 4 to 30 kW 230 V; 4 to 37 kW 380, 460 V.
  • L8W: 30 to 93 kW 380, 460 V.
  • L10W: 93 to 150 kW 380, 460 V.
• PVC windings for L6W, L8W, L10W.
• Optional features: Different voltages and frequencies; High temperature versions.

Motor (L6C Series)

• Insulation class: F.
• Protection class: IP68.
• Three-phase versions (60 Hz):
  • 4 to 22 kW 230 V.
  • 4 to 37 kW 380 V.
  • 4 to 37 kW 460 V.
• Motors with double cable outlet for star/delta start can be supplied upon request.
• Optional features: Special voltages; Inverter applications; Temperature sensor PT 100 / PTC.

Materials of Construction

Detailed tables for materials used in the 6Z8 and 6ZR8 pump series, as well as the L6C motor series, are available in the official PDF, listing components with their EUROPE and USA material designations (e.g., Stainless steel EN 10213-4-GX5CrNi19-10 (1.4308) / A744-CF 8, Duplex stainless steel EN 10088-1-X2CrNiMoN22-5-3 (1.4462) / A276/A790-S31803, NBR, POM (DELRIN ®)). See the official PDF for exact tabulated values.

Performance Data

Hydraulic performance ranges and detailed operating characteristics (Head vs. Delivery, Motor Power) for the 6Z855, 6Z875, 6Z895, and 6Z8125 series at 60 Hz are provided in extensive tables within the official PDF, covering various stages and pump types. Motor operating characteristics for the L6C series (kW, HP, S.F., V, A, rpm, η %, cosφ, Ts/Tn, Is/In, °C, mm², m) are also detailed. See the official PDF for exact tabulated values.

Dimensions and Weights

Detailed tables for pump dimensions (A, C, M, Tmin) and weights (kg) for the 6Z855, 6Z875, 6Z895, and 6Z8125 series are available in the official PDF. Motor dimensions (A) and weights (kg) for the L6C series are also provided. Coupling dimensions for 6", 8", and 10" NEMA standards are listed. See the official PDF for exact tabulated values.

Accessories

• Coupling flange.
• Panels.
• Cables.
• Splices.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the complete OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror