Duwan Environmental's QJB-W5.5 Submersible Recirculation Pump with Auto-Transforming Installation

Duwan Environmental Submersible Recirculation Pump is our company's introduction from GermanyABSThe foundation of our company's technology,96Please provide the Chinese content for translation.The product, developed on the basis of cutting-edge technology, has been warmly welcomed by a wide range of users since its launch into the market. It has been successfully operated in dozens of wastewater treatment plants across the country, yielding satisfactory practical results.

QJB-W5.5 Diving EquipmentThe recirculating pump features anti-clogging and anti-tangling capabilities. The main unit is constructed with stamping molding, offering a compact size, high precision, corrosion resistance, and noiseless operation. It is equipped with multiple protective measures, ensuring safety and reliability.

1Equipment Name:Submersible Sludge Recirculation Pump

2Model No.QJB-W5.5

3Main Technical Parameters:

4Technical Performance

4.1The internal recirculation pump rotates smoothly without any phenomena such as jamming, stalling, or vibration.

4.2 The internal recirculation pump undergoes a sealed pressure test, with the test pressure being:3kg/m2, spanning5No leakage observed for minutes.

4.3 The internal recirculation pump utilizes a dual mechanical seal structure and lip seal arrangement, ensuring mechanical seals are in place to...15000Operates reliably within hours without replacement.

4.4The internal recirculation pump's cable extractionGB5013.2Please provide the Chinese content to be translated into American English.YZWType-A rubber sleeve flexible cables or equivalent cables with similar performance, featuring special vulcanization treatment on the cable sealing heads to prevent water seepage from the cable jacket into the motor; the cable sheath is equipped with reliable protective devices.

4.5 The internal recirculation pump surface is coated with epoxy resin anti-corrosion paint, with a coating thickness exceeding300μmThe surface is glossy, free of sand holes, cracks, and other defects, and the overflow components are coated with epoxy resin anti-corrosion paint.

4.6 The internal recirculating pump oil chamber is equipped with a sealed leakage protection device.

4.7 Internal回流泵extraction cable with dual-color wire (yellow)/The green line is designated as the grounding wire, ensuring reliable connection. The grounding symbol is clearly marked and is not easily worn off during use.

4.8 The impeller blades and rotors of the internal recirculation pump have undergone dynamic balancing tests, with a balancing accuracy ofG6.3；

4.9 The inner回流泵stator winding is equipped with an electronic humidity sensor to prevent the motor winding from being damaged by moisture.

5Life span

The internal recirculation pump operates for an average of not less than15000Hours, with a service life of not less than20Year.

6Structural Design

1Mainframe

The internal recirculation pump features a direct-connected stamping structure, employs multi-stage motors, and its blades are stamped for precision and efficiency. The design is compact, with a small volume and light weight, and is easy to operate and maintain, offering a long service life. The housing is made entirely of stainless steel, ensuring a beautiful and smooth appearance.

2Terminal Box

The junction box is completely sealed and isolated from the surrounding liquids and motor parts.

Cooling: The motor stator is cooled by the surrounding liquid.

3Leaf

The blades are shaped like three-leaf rubber, with steel hubs effectively preventing blade breakage. The blade edges are curved backward for long-term automatic cleaning. They are securely fastened to the shaft with locking nuts, making them easy to detach and replace during lifting and maintenance.

4Motor

Insulation grade for motor windings:FThe grade features a humidity sensor within its stator winding to prevent motor windings from getting damp and burning.

5Oil chamber

The oil chamber serves as a shock-absorbing and noise-dampening function between the lubricated and cooled sealing devices, bearing supports, gears, and the motor and liquid.

6Bearings

The service life of the internal recirculation pump bearing is greater than80000Hour

Considering the adverse factors during bearing operation, the selected bearing lifespan will be higher than the aforementioned value. Our company uses imported bearings.

7Axial Seal

The internal recirculation pump is composed of two mechanical seals and one lip seal. Seal material: Tungsten carbide.--Tungsten carbide.

8Monitoring System

In the stator winding, there are two thermosensitive switches. Under normal circumstances, the motor's temperature does not exceed...85℃。

9）Raw Material Allocation:

Axle - Stainless Steel

Leaf Rotor                             Stainless Steel

壳体                                 不锈钢

紧固件                               不锈钢

安装系统                             不锈钢

OO-Ring                               Nitrile Rubber70

Mechanical Seals                           Tungsten Carbide

7Control System

Each internal recirculation pump is equipped with a control and protection signal line, offering overload, phase failure, short circuit, leakage, and over-temperature protection functions along with corresponding signal indicators, ensuring reliable operation of the unit.

Recirculating pump process conditions:

Installation Location: Aeration Zone, Bio-Pond Underwater Medium: Wastewater within the Bio-Pond

Medium Temperature:8～35Medium TemperaturePH：5～9

Ambient Temperature:-10℃～45℃

Work Method: Underwater intermittent operation or24h/d Continuous Operation

Wall Penetration Pipe (Pay attention to the length of the wall penetration pipe extending from the wall during installation, and compare its position with the guide rod. After the position is properly aligned, secure it in place.)

→ Guide rod (note: both ends must be securely fixed and remain vertically aligned on a single line to avoid uneven stress due to tilting).

→ Door knock (the flange connected to the through-the-wall pipe needs to be fully welded)

→ Bracket Mount (Position better, do not be too far from the guide rod)

→ Lifting Frame   304Stainless Steel Material

→ Hand Winch Galvanized or 304 Stainless Steel Material

→ The lifting chain (traction-type, with several adjustable holes above the lifting frame) must be vertically aligned so that the body can descend straight into the pool, preventing the occurrence of rod jamming.

→ Recirculating Pump  All-copper winding motor

→ Ensure the cable is straightened and securely fastened after the installation of the reflux pump. Please do not start the mixer before the wall flange is in place. When lifting the reflux pump, always turn off the power and protect the cable to prevent damage. Pay attention to cable protection during installation; do not submerge the cable ends in water. The cable is a vulnerable part of the mixer; please secure and protect it before starting the machine.