GQS, GQV

Summary

Product identification

The Calpeda GQS and GQV are single-impeller submersible pumps designed for sewage and drainage applications, featuring a free-flow (vortex) impeller.

• GQS models: Equipped with a vertical threaded delivery port (G 2”).
• GQV models: Equipped with a horizontal flanged and threaded delivery port (DN 50 - G 2”).

Operating limits

• Liquid temperature: Up to 35°C
• pH value: 6-11
• Maximum immersion depth: 5 m
• Minimum immersion depth: 275 mm
• Duty: Continuous (with submerged motor)
• Kinematic viscosity: Max 20 mm²/sec
• Density: 1000 kg/m³

Feed water

These pumps are suitable for domestic or industrial waste water, dirty water with solids up to 50 mm grain size, and other liquids compatible with the pump materials. Applications include draining rooms, emptying tanks, extraction of water from ponds, streams, or pits, and rainwater collection.

Mechanical / hydraulic

• Construction:
  • Double mechanical shaft seal with an interposed oil chamber provides protection against dry-running.
  • The free-flow (vortex) impeller construction is particularly suitable for liquids containing solids up to 50 mm grain size.
  • Pump casing and impeller are treated with epoxy cataphoresis and external paint for enhanced rust protection.
  • A relief valve is fitted to release air around the impeller, ensuring proper pump priming even after long standstill periods.
• Materials:
  • Pump casing: Cast iron GJL 200 EN 1561
  • Impeller, Motor jacket, Jacket cover, 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
  • Seal lubrication oil: Oil for food/pharmaceutical machinery
• Delivery Ports & Connections:
  • GQS models feature a G 2” vertical threaded port.
  • GQV models feature a DN 50 - G 2” horizontal flanged and threaded port.
  • Connection flexibility includes Flange DN 50 PN 10 EN 1092-2, 4 M8 holes on Ø 90 for duck foot coupling SA-G2”, and G 2 ISO 228.
• Dimensions and Weights: See the official PDF for exact tabulated values.

Electrical

• Motor Type: 2-pole induction motor, 50 Hz (n ≈ 2900 rpm).
• Insulation Class: F
• Protection: IP X8 (for continuous immersion)
• Winding: Triple impregnation humidity-proof dry winding.
• Compliance: Constructed in accordance with EN 60034-1; EN 60335-1, EN 60335-2-41.
• Three-phase Models (GQV, GQS):
  • Voltage: 230 V ± 10% or 400 V ± 10%.
  • Cable: H07RN-F, 4G1 mm², length 10 m, without plug.
• Single-phase Models (GQVM, GQSM):
  • Voltage: 230 V ± 10%.
  • Features: Includes a float switch and thermal protector, with an incorporated capacitor.
  • Cable: H07RN-F, 3G1 mm², length 10 m, with plug CEI-UNEL 47166.
  • The float switch allows for easy adjustment of pump start/stop levels.
• Performance Data: See the official PDF for detailed performance curves, P1 (Max. power input), P2 (Rated motor power output), and current (A) for specific models.
• Optional Features (on request): Other voltages, 60 Hz frequency (as per 60 Hz data sheet), other mechanical seal, 20 m cable length, motor suitable for operation with frequency converter, three-phase pumps with incorporated float switch.

---

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