Z6

Summary

Product Identification

The Lowara 6Z6 Series consists of 6” submersible electric pumps, designed for 60 Hz operation.

Models:

• 6Z612
• 6Z616
• 6Z622
• 6Z631
• 6Z646
• 6Z660

Construction Materials:

• Z6 version: AISI 304 stainless steel
• ZN6 version: AISI 316 stainless steel

Identification Code (Example):

• 6Z622 08 - 6: 6” Pump at 60 Hz, AISI 304, flow rate 22 m³/h, 8 stages, with 6” motor connection.
• 6Z622 08 - L6W: 6” Electric pump at 60 Hz, AISI 304, flow rate 22 m³/h, 8 stages, coupled to a 6” motor L6W.
• D suffix indicates a High Pressure Version.

Applications

• Water supply from deep wells.
• Pressure boosting and water distribution.
• Supply of surge tanks and reservoirs.
• Firefighting and washing systems.
• Water table level control.
• Irrigation.
• Mines.

Operating Limits

• Delivery: up to 90 m³/h
• Head: up to 700 m
• Maximum overall diameter of pump:
  • Standard version: 142 mm (one cable guard included)
  • High head version: 177 mm (one cable guard and 6” motor coupling included), 193 mm (one cable guard and 8” motor coupling included)
• Maximum pump immersion depth:
  • 300 m (with L4C motor)
  • 350 m (with L6W and L8W motors)
• Maximum permissible quantity of suspended sand: 100 g/m³
• Horizontal operation: All the pumps can operate in the horizontal position (see operating limits in the motors section of the official PDF).
• Liquid properties for performance data: Density ρ = 1.0 Kg/dm³, kinematic viscosity ν = 1 mm²/sec.

Mechanical / Hydraulic

Delivery Port:

• Standard version:
  • Rp 2 1/2” for 6Z612-6Z616-6Z622 versions
  • Rp 3” for 6Z631-6Z646-6Z660 versions
• High head version:
  • Rp 3” for 6Z612-6Z616-6Z622-6Z631 versions
  • Rp 4” for 6Z646-6Z660 versions

Construction Characteristics:

• Head and motor support made of microcast stainless steel.
• Delivery port equipped with holes for safety hooks.
• Stainless steel integrated non-return valve.
• Stainless steel impeller with removable wear ring.
• Stainless steel shaft protected by shaft sleeves.
• Replaceable coupling.

Table of Materials (Summary): Main components are constructed from stainless steel (AISI 304 or AISI 316/316L/Duplex depending on the pump version).

• Discharge head, Valve support, Valve, Bolts and screws, Impeller, Diffuser, Tie rod, Cable guard, Strainer, Lower support: Stainless steel (e.g., EN 10213-4 - GX5CrNi19-10 (1.4308) / ASTM CF-8 (AISI 304 cast) or EN 10213-4 - GX5CrNiMo19-11-2 (1.4408) / ASTM CF-8M (AISI 316 cast)).
• Spacer, Shaft, Coupling: Stainless steel (e.g., EN 10088-1 - X17CrNi16-2 (1.4057) / AISI 431 or Duplex stainless steel).
• Elastomers: EPDM
• Thrust bearing: Tungsten carbide
• Wear rings: Technopolymer PPO, PTFE+Graphite. For full material specifications including EUROPE (EN) and USA (ASTM/UNS) reference standards, please refer to the official PDF.

Performance Data

Detailed hydraulic performance ranges, characteristic curves (H-Q, η, kW/stage, NPSH), and electropump operating characteristics tables (Head vs. Delivery for various power ratings and stages) are available in the official PDF for each series (6Z612, 6Z616, 6Z622, 6Z631, 6Z646, 6Z660).

Mechanical Dimensions and Weights

6Z612 Pump Series (1 to 27 Stages):

• Maximum Pump ø D (mm): 142 (1 Cable), 144 (2 Cables)
• Coupling 4" (NEMA) Dimensions (mm): N=130, K=76.2, F=9.5, B=10.5, E H7=87.3
• Coupling 6" (NEMA) Dimensions (mm): N=136, K=111.1, F=14.5, B=15, E H7=76.2
• Weights vary by model and stage count. For example:
  • 6Z612 01-4: 9 kg
  • 6Z612 27-6: 41 kg

6Z612 Pump Series (28 to 41 Stages - High Pressure Version):

• Maximum Pump ø D (mm): 177 (1 Cable), 180 (2 Cables)
• Weights vary by model and stage count. For example:
  • 6Z612 28D-6: 71 kg
  • 6Z612 41D-6: 115 kg

For detailed dimensions and weights for all models and stages, please refer to the official PDF.

Accessories

• Coupling flanges.
• Control panels.
• Drop cables.
• Cooling shrouds.

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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 on the project.

Official datasheet (PDF)

Lenntech datasheet mirror