The burks BW/BWP/BWJ/BWJP/BWG/BWGP/BGW/BWL/BYW submersible sewage pump

Model Designation

Example 150BW151-35-37: 150 = discharge diameter 150 (mm); BW = series code; 151 = rated flow 151 (m³/h); 35 = rated head 35 (m); 37 = motor power 37 (kW). The series includes: BW submersible non-clog Sewage pump, BWP submersible non-clog stainless steel Sewage pump, BWJ submersible Sewage pump with agitation, BWJP submersible stainless steel Sewage pump with agitation, BWG submersible Sewage pump with cutter, BWGP submersible stainless steel Sewage pump with cutter, BGW pipeline Sewage pump, BWL vertical pipeline Sewage pump, BYW submersible (long-shaft) non-clog Sewage pump.

Operating Conditions

Liquid temperature for submersible pumps 0 °C to +40 °C (high-temperature versions available on request); liquid temperature for dry-installed pumps 0 °C to 100 °C (high-temperature versions available on request); maximum ambient temperature for dry-installed pumps 40 °C; pH value 4 to 10 (corrosive liquids available on special request); maximum density of the pumped liquid 1200 kg/m³.

Applications

For municipal engineering, building services, industrial drainage, environmental sewage treatment and factory/mining wastewater treatment, pumping sewage, wastewater and rainwater containing solids and long fibres; stainless steel versions can also pump corrosive media. Widely used for drainage of underground building pits, industrial sumps and rainwater pits.

Main Component Materials

Note: for other materials, please enquire separately.

Features

1. Reliable design: ensures a high degree of stability and prevents sudden accidents.
2. Closed impeller: cast iron or stainless steel; an optional cutter device in high-strength wear-resistant material shreds long fibres and elongated solid matter to prevent clogging.
3. Shaft design: submersible and pipeline Sewage pumps use a shorter shaft design to avoid shaft deflection, extend the service life of seals and bearings, and run with low vibration and low noise; the submersible (long-shaft) pump immersion depth can be customised.
4. Heavy-duty ball bearings: maintenance-free lubricated bearings, pre-filled with lubricating oil, no re-lubrication needed during service life.
5. Mechanical seal system: reliable burks alloy seal set.
6. Cooling system: submersible pumps of 11 kW and above can be fitted with a motor with its own water-circulation cooling system, allowing dry installation or low-water-level installation.
7. Protection devices: an additional control cabinet can provide phase-loss, overload, under-voltage and short-circuit protection.
8. Installation: wet or dry installation; submersible pumps can be installed with an auto-coupling device purchased separately.

Technical Data

The range covers the BW, BWP, BWJ, BWJP, BWG, BWGP, BGW, BWL and BYW sub-series; diameter, flow, head and power are specified per model. For detailed data, see the user manual / selection catalogue.

Troubleshooting

1. No sound at all and no operation after the power cable is connected
a) Cable broken → Replace the cable
b) Poor contact of the power cable → Make a complete connection
c) Motor copper wire broken → Repair and rewind the coil
d) Protector tripped → Trace the cause of tripping and deal with it
e) Protector defective → Replace the overload protector
f) Fuse blown → Replace the fuse

2. Slight sound but no operation
a) Three-phase pump in phase-loss state due to poor single-phase contact → Make a complete connection
b) Three-phase pump in phase-loss state due to poor switch contact → Adjust the contact parts
c) Three-phase pump in phase-loss state due to a broken cable core → Replace the cable
d) Three-phase pump in phase-loss state due to a blown fuse → Replace the fuse
e) Three-phase pump in phase-loss state due to poor outlet cable contact → Make a complete connection
f) Single-phase break in the motor copper wire → Repair and rewind the coil
g) Locked state caused by a seized bearing → Replace the bearing
h) Capacitor of the single-phase pump defective → Replace the capacitor
i) Centrifugal switch of the single-phase pump defective → Replace the centrifugal switch
j) Impeller restrained → Remove the impeller and clear the debris
k) Voltage drop → Adjust the supply voltage
l) Generator power insufficient → Use a larger generator

3. Stops immediately after starting
a) Voltage drop → Adjust the supply voltage
b) Generator power insufficient → Use a larger generator
c) Voltage unbalance of the three-phase pump → Adjust the power supply
d) Protector defective → Replace the overload protector
e) Motor copper wire defective → Repair and rewind the coil
f) Viscosity of the pumped liquid too high → Consult the supplier
g) Mixing ratio of the pumped liquid too high → Consult the supplier
h) Temperature of the pumped liquid too high → Consult the supplier
i) Three-phase pump running in reverse → Swap any two of the three phases

4. Insufficient discharge or no water pumped
a) Wrong selection: duty head too high, resulting in insufficient flow → Replace with a suitable pump
b) Wrong selection: head loss too large → Replace with a suitable pump
c) Three-phase pump running in reverse → Swap any two of the three phases
d) Discharge pipe blocked → Clear the blockage until the pipe flows freely
e) Impeller worn → Replace the impeller
f) Strainer blocked → Clear the debris from the strainer

5. Severe vibration
a) Impeller unevenly worn → Replace the impeller
b) Reverse rotation → Swap any two of the three phases
c) Bearing defective → Replace the bearing
d) Excessive air drawn in during pumping → Check the installation of the pump

6. Electric leakage on contact or protector tripping
a) Insulation degraded, causing leakage → Stop the pump and repair it

Warnings

1. Failure to observe the safety warnings may cause personal injury, equipment damage and other property loss, for which burks bears no responsibility and no compensation.
2. Installers and operators must observe local safety regulations; this product must be installed and maintained by professional personnel.
3. The equipment must be fitted with a leakage protection device.
4. Disconnect the power supply and water source during installation and maintenance.
5. If the flexible power cable is damaged, it must be replaced by professional personnel.
6. Children and non-professional persons must not touch or use this equipment.

Warranty Terms

1. This is to certify that the product listed is covered by our company warranty and has passed strict quality control and inspection under our quality management system.
2. Please keep this certificate properly; no replacement will be issued if it is lost.
3. Failures not caused by human factors under normal use are warranted for one year from the date of purchase.
4. After the warranty period, spare parts are charged at part cost plus a service fee.
5. During the warranty period, replacement parts may be improved parts.
6. Failures caused by force majeure (such as cold weather, earthquakes, floods and other natural disasters) or by human factors are not covered by the warranty.
7. The product must be installed and used in a ventilated, dry environment with an ambient temperature not exceeding 40 °C; installation and use must be carried out by professional personnel in accordance with the instructions, and failures caused by improper installation are not covered by the warranty.
8. Please test-run and inspect the product immediately upon delivery; any quality objection must be raised within one week, otherwise it will not be accepted.