Duwan Environmental QJB-W1.5 QJB-W2.5 Submersible Recirculation Pumps with Variable Frequency Control Cabinet
Underwater Penetrating Pump Quotation
Sludge Wall Penetration Pump Performance Parameters
Motor Power: 1.5 kW
Motor Power: 2.5 kW
Material: 304 Stainless Steel
Duwan Environmental QJB-W Type Sludge Recirculation Pump or Submersible Recirculation PumpPump performance and structure
Performance
（1) The wall-mounted pump operates smoothly without any jamming, stalling, or vibration.
（2) The wall penetrating pump undergoes a sealed gas pressure test with a test pressure of 0.2 Mpa.
（3) The wall-mounted pump features a dual mechanical seal and lip seal structure, ensuring reliable operation for up to 10,000 hours without the need for replacement.
（4) The wall-piercing pump lead cables are made of YZW type rubber sheath flexible cables or equivalent cables, with the cable sealing heads treated with special vulcanization to prevent water from seeping into the motor due to cable sheath damage.
（5) The wall penetration pump oil chamber is equipped with a sealing leakage protection device.
（6) The two-color wires (yellow/green) in the cable leading from the wall-mounted pump are designated as the ground wire, ensuring a reliable connection. The ground marking is prominent and not easily worn off during use.
（7) The wall-mounted pump motor rotor is tested for dynamic balance, with a balance accuracy of G6.3.
（8) The stator winding of the wall penetrating pump motor is equipped with a thermal protection switch.
（9）During the operation of the wall penetration pump, deviations of the power voltage and frequency from the rated values and their impact on motor performanceThe temperature rise effect is in line with expectations. GB755 Regulations, the motor's electrical performance complies with JB/T8092、JB/Z346、
Regulations as stated in GB5013.4.
（10) The through-wall pump can freely rise and fall on the guide bracket and can be quickly coupled with pre-buried return pipes for smooth and reliable operation.
Structure
（Cable entry seal
The cable entry seal is a complete unit with a fixed plate. The cable entry is strictly guaranteed for waterproof and submersion sealing.
（2) Electric Motor
Three-phase squirrel-cage induction motor, shell design, filled with air inside the shell, directly started. The motor can continuously stir. 40Medium of ℃, per hourPlease provide the Chinese content you would like translated into American English.Large startup count 15 Each time, upon each startupThe intervals between them are evenly spaced.
The motor's design accommodates changes in rated voltage.±5Provide its rated output within % range.Under normal operating conditions, as long as the motor does not reach full load continuously.±10% voltage rating toleranceAcceptable to some degree. The motor allows for an allowable phase voltage imbalance of 2Within % of. The stator is through the surroundingLiquid cooling. Cable diameter greater than 1．5mm2 Connect thermally sensitive switches and optional protective sensors; cable sheath is resistant to污水corrosion.
（3) Mechanical Seals
The agitator is equipped with two independent mechanical seal systems. The seals operate in the oil cavity, using liquid power to spray oil onto the sealing surface at a constant rate for lubrication. ExternalA sealed component is situated between the mixing liquid and oil cavity, containing a stable and positively driven rotating tungsten carbide ring. The internal secondary seal, located between the oil cavity and motor housing, includes a stable tungsten carbide ring and a positively driven rotating tungsten carbide ring. Only the outer seal surface comes into contact with the mixing medium. Each sealing interface is equipped with a spring.The system is tightly sealed. No maintenance is required for the seal, nor is there a need for seal adjustment or rotation direction.Paraffin-type white oil with oil injection, free of aromatic hydrocarbons.
（4) Bearings
Impeller shaft and motor shaft form an integral unit.The motor features two fully enclosed deep groove ball bearings.Single-row spherical roller bearings are required to bear axial loads, with a service life of not less than 10,000 hours.
（5) Oil chamber
Oil provides lubrication and cooling for the seals, and acts as an additional barrier against leaking fluids. The pressure accumulated in the oil chamber is mitigated through an internal volume of space.
（6) Impeller
The impeller is three-blade design with wide blades, thin sides, smooth surface, and backward sweep shape, featuring self-cleaning capabilities to ensure non-clogging and trouble-free operation of the recirculation pump.
（7) Protection
All motors feature phase windings connected to thermal switches, which are串联 in series. The thermal switches are in the circuit.
At 125°C, the motor stops rotating and alarms.
2)The motor room is equipped with a humidity sensor, providing an over-temperature alarm for each sludge recycle pump's motor.And humidity limit alarm monitor protector. When temperature and humidity exceed the limits, the control circuit immediately discharges sludge.Recirculation pump shutdown to protect the motor, alarm monitor installed on the electrical control cabinet.
（8) Impeller shaft
The impeller shaft and the motor shaft are one and the same, ensuring smooth and rapid operation of the motor.
（9) Cooling System
The motor is effectively cooled by the surrounding liquid stirred.
Diving ReturnPump Component Materials
Motor housing HT250 Corrosion Prevention
Impeller shaft 2Crl3
Impeller 304No content provided.RustSteel
ScrewsScrewBoltsNutWaiting for connectionEnclosedPiece 304Stainless Steel
Guide rodPlease provide the Chinese content that needs to be translated into American English.Rack 304No content provided.RustSteel
O Formed ring Nitrile rubber
Mechanical Seal Silicon carbideTungsten Carbide
Duwan Environmental QJB-W Submersible Recirculation PumpMain components and supply scope (not limited to these):
A. Fully assembled submersible internal recirculating pump (including propeller, mechanical seal, shaft, etc.)
B. Submersible Motor
C. Internal recirculation pump guide and fixed bracket, cable fasteners, steering and positioning device
Enhance Chain
E. Hanger Mounting Bracket (Corresponding to Number of Equipment)
F. Hangers and Lifting Devices
G. PerTaiRecirculating pump required10-meter underwater cable and fittings, connectors, fasteners
Leak and Overheat Protection Device
I. All connecting accessories, chemical foundation bolts
