Submersible pumps · WQ

WQ Submersible Sewage and Wastewater Pump

Name: WQ Submersible Sewage and Wastewater Pump
Brand: JIABO

Submersible sewage pumps for wastewater transfer, municipal pumping stations, sumps and pits. Select by solids size, flow, total dynamic head and installation depth.

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WQ Submersible Sewage and Wastewater Pump

Product photos

Explore the WQ series.

Select a photo to open its product information page. The supplied images do not identify exact model numbers; request a current datasheet before ordering.

Submersible pumps · WQ

Typical applications

Where this series may fit.

Application fit and final model depend on operating conditions. Please confirm with the current technical sheet.

Wastewater transfer
Sump and pit installations
Submerged pumping systems

Technical overview

How this range is used.

These are series-level characteristics, not a performance guarantee for a specific model. Confirm flow, head or pressure, power, dimensions, materials, and operating limits against the current datasheet.

Operating principle
A submerged centrifugal impeller lifts wastewater from a wet well or sump.
Configuration
Submersible motor-and-pump assembly for wet installation.
Liquid suitability
Wastewater; permissible solids and chemistry depend on the exact model.
Typical use
Sewage transfer, pits, and wastewater pumping stations.

WQ/QG product overview

High-head submersible sewage pump with twin-cutter system.

WQ/QG cutter pumps are intended for domestic and project wastewater containing short fibres, paper fragments, wood chips, starch, sediment and similar suspended solids in non-corrosive service. The rotating impeller and twin-cutter arrangement reduces clogging and winding risk. The supplied description specifies liquid temperature up to 40°C, density up to 1,200 kg/m³ and pH up to 9.

The stated construction uses a double mechanical seal and a wear-resistant stainless-steel impeller. WQK variants share the general internal arrangement but omit the cutting device.

Submersible, compact construction for wastewater pits and sumps.
Twin-cutter arrangement for short fibres and compatible solids.
High-head model range from 7 m to 40 m in the supplied table.
Outlet sizes from 25 mm to 150 mm.
Three-phase 380 V models listed at 1,450 or 2,900 r/min.

Applications

Engineering and domestic wastewater.

Construction sites, foundation works, municipal facilities and water-treatment facilities.
Basements, civil-defence spaces, underground structures and metro drainage.
Wastewater treatment and circulating-water transfer for small and medium industrial sites.
Slurry and wastewater transfer in food, paper, brewing, metal, leather, textile, pharmaceutical and cement operations, subject to liquid compatibility.
Livestock farms, aquaculture ponds, pond cleaning, aeration-support transfer and septic-tank duties.

Liquid limits

Check solids and abrasiveness first.

Maximum stated liquid temperature: 40°C.
Maximum stated density: 1,200 kg/m³.
Stated pH: up to 9; confirm the permitted lower pH and material compatibility before selection.
The range is described for non-corrosive media.
Continuous high-sand service can rapidly wear wetted and cutting components; investigate a vortex-type sewage pump where appropriate.

Installation safety

Inspect, protect and lower the pump correctly.

Inspect the cable before use. Never pull, lift or suspend the pump by its cable.
Verify insulation resistance before commissioning; the supplied instruction states not less than 1 MΩ before use.
Connect the protective earth and use correctly rated leakage, phase-loss and overcurrent protection.
Briefly check rotation before installation; do not run the dry rotation test for more than 30 seconds.
Lower the pump using a suitable rope or lifting chain attached to the handle.
Keep people out of the water while the pump is energised, moved, inspected or cleared.
Do not operate with the pump exposed above the liquid for extended periods, and avoid excessive start-stop cycling.
Disconnect immediately if the pump stalls, protection trips or a fuse opens. Do not continue operation until the cause is corrected.

WQ/QG performance parameters

40 high-head cutter-pump models.

The supplied list contains two WQ80-20QG entries with different outlet sizes; both are reproduced exactly and require model confirmation before ordering.

Model	Outlet	Flow	Head	Motor	Speed	Voltage
WQ5-20QG	25 mm	5 m³/h	20 m	0.75 kW	2,900 r/min	380 V
WQ8-22QG	25 mm	8 m³/h	22 m	1.1 kW	2,900 r/min	380 V
WQ8-12QG	32 mm	8 m³/h	12 m	0.75 kW	2,900 r/min	380 V
WQ12-15QG	32 mm	12 m³/h	15 m	1.1 kW	2,900 r/min	380 V
WQ15-15QG	40 mm	15 m³/h	15 m	1.5 kW	2,900 r/min	380 V
WQ15-30QG	40 mm	15 m³/h	30 m	2.2 kW	2,900 r/min	380 V
WQ20-7QG	50 mm	20 m³/h	7 m	0.75 kW	2,900 r/min	380 V
WQ10-10QG	50 mm	10 m³/h	10 m	0.75 kW	2,900 r/min	380 V
WQ10-12QG	50 mm	10 m³/h	12 m	1.1 kW	2,900 r/min	380 V
WQ20-15QG	50 mm	20 m³/h	15 m	1.5 kW	2,900 r/min	380 V
WQ20-20QG	50 mm	20 m³/h	20 m	2.2 kW	2,900 r/min	380 V
WQ15-25QG	50 mm	15 m³/h	25 m	2.2 kW	2,900 r/min	380 V
WQ18-30QG	50 mm	18 m³/h	30 m	3 kW	2,900 r/min	380 V
WQ15-35QG	50 mm	15 m³/h	35 m	4 kW	2,900 r/min	380 V
WQ25-32QG	50 mm	25 m³/h	32 m	5.5 kW	2,900 r/min	380 V
WQ20-40QG	50 mm	20 m³/h	40 m	7.5 kW	2,900 r/min	380 V
WQ25-7QG	65 mm	25 m³/h	7 m	1.5 kW	2,900 r/min	380 V
WQ25-15QG	65 mm	25 m³/h	15 m	2.2 kW	2,900 r/min	380 V
WQ37-13QG	65 mm	37 m³/h	13 m	3 kW	2,900 r/min	380 V
WQ25-30QG	65 mm	25 m³/h	30 m	4 kW	2,900 r/min	380 V
WQ25-35QG	65 mm	25 m³/h	35 m	5.5 kW	2,900 r/min	380 V
WQ30-40QG	65 mm	30 m³/h	40 m	7.5 kW	2,900 r/min	380 V
WQ40-8QG	80 mm	40 m³/h	8 m	1.5 kW	2,900 r/min	380 V
WQ40-10QG	80 mm	40 m³/h	10 m	2.2 kW	2,900 r/min	380 V
WQ43-13QG	80 mm	43 m³/h	13 m	3 kW	2,900 r/min	380 V
WQ30-15QG	80 mm	30 m³/h	15 m	3 kW	2,900 r/min	380 V
WQ40-15QG	80 mm	40 m³/h	15 m	4 kW	2,900 r/min	380 V
WQ60-20QG	80 mm	60 m³/h	20 m	5.5 kW	2,900 r/min	380 V
WQ65-25QG	80 mm	65 m³/h	25 m	7.5 kW	2,900 r/min	380 V
WQ80-20QG	80 mm	80 m³/h	20 m	7.5 kW	2,900 r/min	380 V
WQ85-10QG	100 mm	85 m³/h	10 m	4 kW	2,900 r/min	380 V
WQ110-10QG	100 mm	110 m³/h	10 m	5.5 kW	2,900 r/min	380 V
WQ100-15QG	100 mm	100 m³/h	15 m	7.5 kW	2,900 r/min	380 V
WQ80-20QG	100 mm	80 m³/h	20 m	7.5 kW	2,900 r/min	380 V
WQ100-25QG	100 mm	100 m³/h	25 m	11 kW	1,450 r/min	380 V
WQ100-30QG	100 mm	100 m³/h	30 m	15 kW	1,450 r/min	380 V
WQ115-15QG	125 mm	115 m³/h	15 m	11 kW	1,450 r/min	380 V
WQ130-20QG	125 mm	130 m³/h	20 m	15 kW	1,450 r/min	380 V
WQ130-15QG	150 mm	130 m³/h	15 m	11 kW	1,450 r/min	380 V
WQ180-15QG	150 mm	180 m³/h	15 m	15 kW	1,450 r/min	380 V

Published values are model reference points. Confirm the exact operating curve, allowable solids, cable length, installation arrangement and motor protection before ordering.

Troubleshooting guide

Stop and isolate before inspection.

Electrical and submerged-equipment service must be performed by qualified personnel. Never work on an energised pump.

Symptom	Possible causes	Recommended action
Pump does not run	Power cable not connected, one phase missing, impeller/cutter jammed, motor or protection device damaged	Isolate power; check supply, phases and protection. Clear the blockage and set the cutter clearance to 0.2–0.5 mm only if authorised by the service procedure.
Low flow or insufficient head	Excessive impeller clearance, worn impeller, low motor speed, low voltage or reverse rotation	Restore the specified clearance, replace worn parts, confirm rated voltage and cable size, and correct phase rotation.
Poor cutting performance	Excessive cutter clearance or blunt cutting edges	Adjust the cutter clearance to 0.2–0.5 mm or replace the impeller and cutter plate.
Protection trips	Incorrect protector, moisture ingress, low insulation resistance, winding fault, phase loss, low voltage, blockage, excessive viscosity/sand or bearing damage	Disconnect immediately. Test the supply, insulation, seals, windings and bearings; correct the liquid or blockage condition before restarting.

Selection information

What we need to size it.

Required flow and total dynamic head
Solids size, concentration and liquid chemistry
Pit depth, discharge connection and electrical supply

Reference specification sheet

Parameters for an international quotation.

These values describe common enquiry formats in Europe and North America—not confirmed ratings for every JIABO model. The quotation and motor nameplate control the final specification.

Primary duty data	Required flow and total dynamic head, pit depth, normal/minimum liquid level and installation type.
Wastewater data	Maximum solids size, fiber content, concentration, pH, temperature, abrasiveness and corrosiveness.
Electrical reference	Europe: 1 × 220–240 V, 50 Hz (smaller duties) or 3 × 380–415 V, 50 Hz. North America: commonly 3 × 230/460 V, 60 Hz. Confirm the exact motor nameplate before ordering.
Construction to specify	Free-standing or guide-rail installation, discharge size, cable length, impeller type, materials and level control.
Documents to request	Curve, solids passage, motor current, cable data, dimensions, submergence limit and approved control/protection arrangement.

Regional electrical examples are reference conventions supported by published manufacturer data: Grundfos 230/400 V, 50 Hz data ↗ and Franklin Electric 230/460 V, 60 Hz data ↗. Availability must be confirmed for the selected JIABO model.

Technical confirmation

Ask for the current model table and curve.

Use the published table as a shortlist only. Send your operating point so JIABO can confirm the exact model, current performance curve, motor supply and materials.

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WQ Submersible Sewage and Wastewater Pump

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