Electric Submersible Slurry Pump
Electric submersible slurry pump (SZBQ): IP68 4-pole IE3 motor, 380 V/3-ph/50 Hz (to 380–600 V, 50–60 Hz), flow 10–6000 m³/h, head 8–60 m, 3–450 kW.
Electrically driven submersible slurry pump — motor and pump form a single assembly lowered into the sump. No pump house, no foundation, and an integrated protection package that stops the unit before a fault becomes motor damage.
- SZQ / SZBQ series, discharge 80–500 mm, high-chrome A05 wet end
- Winding over-temperature, oil-chamber leakage, motor-cavity float, bearing temperature
- Overload, phase-loss and short-circuit protection
- IP68 submersible motor, class F insulation, medium-cooled stator casing
- 380 V 50 Hz standard; 380–600 V and 50/60 Hz to order
- Four control configurations including automatic alternating duty
CE · EAC · ISO 9001 · ISO 14001 · ISO 45001
Overview
The SZBQ intelligent submersible slurry pump is an electrically driven, fully submersible unit in which motor and pump form a single assembly lowered directly into the sump. No surface pump house or fixed foundation is required. The wet end is cast in high-chrome alloy for abrasive duty, and the motor carries an integrated sensor and protection package that shuts the unit down before a fault becomes motor damage.
Component callouts — submersible slurry pump structure
- Motor stator and rotor
- Isolation oil chamber
- Rubber diaphragm
- Structure
- Flow stabilizing plate
- Guards
- Pump body
- Impeller
- Pump base
Working conditions
| Inlet / outlet diameter | 65–400 mm (flange dimensions to GB/1724.16-2022) |
|---|---|
| Flow range | 30–2000 m³/h |
| Head range | 6–260 m |
| Speed | 720, 990, 1480 and 2960 r/min |
| Motor power | 3–315 kW |
| Temperature range | Maximum liquid temperature ≤ 40 °C |
| Maximum working pressure | Inlet pressure + pumping pressure: 1.0 MPa(G) for Hsp ≤ 75 m, or 1.6 MPa(G) for Hsp > 75 m. Special configuration to 1.6 MPa(G) or 2.5 MPa(G) |
| Medium | Liquids carrying solid particles such as sand, cinder and tailings. Maximum particle diameter 7–60 mm depending on model |
| Structural design | Single-stage single-suction centrifugal pump, vertical mounting |
Model designation
Example: 100-SZ(B)Q 40-30-7.5
| 100 | Outlet diameter in millimetres |
|---|---|
| SZ(B)Q | Submersible slurry pump |
| SZ | Structure |
| (B) | Automatic protection device |
| 40 | Pump design point flow rate, m³/h |
| 30 | Pump design point head, m |
| 7.5 | Motor power, kW |
Protection and Monitoring
Submersible motor life is normally limited by how the motor fails rather than how it wears: dry running, seal leakage admitting medium into the windings, or sustained overload raising winding temperature. The SZBQ package monitors each of these directly.
- Winding over-temperature — thermal elements embedded in the stator winding raise an alarm and stop the pump when winding temperature reaches the set point.
- Oil-chamber leakage probe — detects failure of the primary mechanical seal and signals when leaked medium reaches a set proportion in the oil chamber.
- Motor-cavity float switch — detects failure of the secondary seal; when oil or an oil-water mixture reaches the motor cavity the pump is stopped.
- Bearing temperature — monitors motor bearing temperature.
- Electrical protection — overload, phase loss and short-circuit protection.
Signals are processed in a dedicated control panel providing control, protection, audible and visual alarm, and single- or multi-pump automatic sequencing. Where the customer supplies their own panel, the protection controller must be fitted in that panel; our electrical group will advise on the installation.
Motor and Electrical Construction
- Purpose-designed submersible motor, IP68 enclosure, class F insulation.
- Motor heat is rejected through the stator casing to the surrounding liquid; reliable operation requires only that the stator casing remains submerged, and cooling improves with greater submergence.
- Motor shell in Q235 steel with 316 stainless fasteners.
- Stator and rotor in 600-grade silicon steel; windings in Q2T/180 high-temperature magnet wire; motor efficiency class 2.
- Motor shaft in 4Cr13, tempered.
- Bearings: double-row angular contact bearing at the lower position with a deep-groove bearing above, sized with margin for the radial and axial loads of solids-handling duty.
- Heavy-duty rubber-sheathed flexible cable rated for continuous full-load operation at 40 °C ambient; cable gland compressed against the motor cover, with rubber vulcanised to the conductor cores so that a damaged outer sheath still does not admit medium to the motor.
Control Options
Electrical control can be specified for 380–600 V and 50 or 60 Hz. PLC display monitoring covers bearing temperature, seal leakage, motor water ingress and motor overcurrent or overheating, with live status readout. Four control configurations are available: standard water supply and drainage; supply and drainage with overflow alarm; continuous automatic alternating drainage; and continuous automatic alternating drainage with overflow alarm.
Typical Applications
- Mining and metallurgy — tailings disposal and abrasive slurry transfer in mineral processing.
- Power generation — fly ash, bottom ash and desulphurisation sludge.
- Dredging and environmental works — river desilting and harbour maintenance.
- Municipal and construction — sump dewatering, sediment and flowing sand.
- Coal, cement and paper — mortar, pulp and high-solids slurries.
Selection
Send the required flow, head, medium, particle size, solids concentration, density, voltage and frequency. We will confirm the model, wet-end material and control configuration, and issue the matching performance curve with the quotation.
More Pictures
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| Series | SZQ / SZBQ intelligent submersible slurry pump |
|---|---|
| Discharge size | 80–500 mm |
| Wet-end material | High-chrome alloy (A05) |
| Power supply | 380 V three-phase 50 Hz standard; 380–600 V and 50/60 Hz available to order |
| Medium temperature | Standard duty up to 60 °C; higher temperatures require prior specification |
| Medium pH | 4–10 subject to material selection |
| Medium density | Up to 1300 kg/m³ |
| Solids concentration | Mortar to 45 % by weight; pulp to 60 % by weight |
| Maximum solid size | Not more than 80 % of the smallest flow-passage dimension of the selected pump |
| Submergence | Designed for operation to 20 m |
| Motor enclosure | IP68 submersible motor, class F insulation |
| Shaft sealing | Two independent mechanical seals in series, tungsten carbide faces, oil-chamber barrier |
What stops the motor burning out if a seal fails?
Two seals run in series with an oil chamber between them. A probe in the oil chamber detects primary-seal leakage, and a float switch in the motor cavity detects secondary-seal leakage and stops the pump. Winding and bearing temperature are monitored independently.
Does the pump need a pump house or foundation?
No. The motor-pump assembly is immersed directly in the sump. Fixed installation uses quick-fit guide-rail components anchored to the foundation; mobile installation requires no fixed work at all.
Can it be supplied for 60 Hz or non-standard voltage?
Yes. Standard supply is 380 V three-phase 50 Hz; 380–600 V and 50 or 60 Hz can be specified, together with the matching control panel.
How is the pump lifted for service?
With quick-fit guide rails, the pump is raised along the rail by chain without draining the sump, and on lowering it re-connects automatically to the quick-fit discharge elbow.
Manufacturer-direct supply · Technical pump-selection support · Export documentation on request.
