GQN

Summary

Product identification

The GQN series consists of submersible sewage and drainage pumps featuring a single-impeller with two-passage channels and a vertical threaded delivery port (G 2”). They are equipped with a double mechanical shaft seal with an interposed oil chamber for protection against dry-running.

Applications:

• For domestic or industrial wastewater and dirty water containing solids up to 50 mm grain size.
• Suitable for liquids compatible with the pump materials.
• For draining rooms or emptying tanks.
• Extraction of water from ponds, streams, or pits, and for rainwater collection.

Operating limits

• Liquid temperature: Up to 35° C
• pH value: 6-11
• Maximum immersion depth: 5 m
• Minimum immersion depth: 275 mm
• Continuous duty: With submerged motor
• Kinematic viscosity: Max 20 mm²/sec
• Density: 1000 kg/m³
• Solids grain size: Up to 50 mm

Electrical

The pumps feature a 2-pole induction motor, 50 Hz (n ≈ 2900 rpm), with triple impregnation humidity-proof dry winding.

GQN (Three-phase models):

• Voltage options: 230 V ± 10%; 400 V ± 10%
• Cable: H07RN-F, 4G1 mm², length 10 m, without plug

GQNM (Single-phase models):

• Voltage: 230 V ± 10%
• Includes float switch and thermal protector.
• Incorporated capacitor.
• Cable: H07RN-F, 3G1 mm², length 10 m, with plug CEI-UNEL 47166

General Motor Specifications:

• Insulation class: F
• Protection: IP X8 (for continuous immersion)
• Compliance: EN 60034-1; EN 60335-1, EN 60335-2-41

Other features on request:

• Other voltages
• Frequency 60 Hz (as per 60 Hz data sheet)
• Other mechanical seal
• Cable length 20 m
• Motor suitable for operation with frequency converter
• Three-phase pumps with incorporated float switch

Mechanical / hydraulic

• Delivery port: Vertical threaded G 2”
• Impeller: Channels impeller (two-passage)
• Shaft seal: Double mechanical shaft seal with oil chamber (food/pharmaceutical machinery oil)
• Casing treatment: Pump casing with epoxy cataphoresis treatment joined to external paint for rust protection.
• Impeller treatment: Impeller with epoxy cataphoresis treatment for rust protection.
• Relief valve: Fitted for air release around the impeller, ensuring proper pump priming after long standstill periods.
• Float switch: Easy adjustment of start/stop pump levels (for GQNM models).

Materials:

• Pump casing: Cast iron GJL 200 EN 1561
• Impeller: Chrome-nickel steel 1.4301 EN 10088 (AISI 304)
• Motor jacket: Chrome-nickel steel 1.4301 EN 10088 (AISI 304)
• Jacket cover: Chrome-nickel steel 1.4301 EN 10088 (AISI 304)
• Casing cover: Chrome-nickel steel 1.4301 EN 10088 (AISI 304)
• Handle: Polypropylene (with frame in AISI 304)
• Shaft: Chrome-nickel steel 1.4301 EN 10088 (AISI 304)
• Mechanical seal (upper): Ceramic alumina/Carbon/NBR
• Mechanical seal (lower): See the official PDF for exact tabulated values.
• Seal lubrication oil: Oil for food/pharmaceutical machinery

Dimensions and Weights: Dimensions and weights are provided for various GQN and GQNM models, including overall height and weight. See the official PDF for exact tabulated values.

Performance: Characteristic curves (H-Q) are provided for GQN 50-13, GQN 50-15, and GQN 50-17 models at approximately 2900 rpm, showing head (m, ft) versus flow rate (l/min, m³/h, U.S. g.p.m.). Electrical performance data (P1, P2, current) is also tabulated for specific models and voltages. See the official PDF for detailed performance curves and tabulated values.

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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 original OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror