Duwan Environmental QJB-W7.5 Submersible Recirculation Pump Coupling Installation

Submersible Recirculation Pump Unit Description：

Duane QJB-W7.5 Submersible Recirculation Pump is our company's introduction from GermanyABSThe foundation of our company's technology is...96Please provide the Chinese content you would like translated into American English.FrontierProducts developed on the basis of our technology have been well-received by a wide range of users since their launch, achieving success in...DomesticDozens of wastewater treatment plants have been put into operation, yielding satisfactory practical results.

QJB-WThe internal recirculation pump features anti-blocking and anti-tangling capabilities, with the main unit utilizing a stamping molding structure. It boasts a compact size, high precision, corrosion resistance, and noiseless operation. It is equipped with multiple protective measures for safety and reliability.

1Equipment Name:Submerged SludgeRecirculating Pump

2Model No.QJB-W7.5

3Main Technical Parameters:

4Technical Performance

4.1 DivingThe recirculation pump rotates smoothly with no phenomena such as jamming, stalling, or vibration.

4.2 DivingRecirculation pump undergoes sealing pressure test, with test pressure being3kg/m2, spanning5No leakage observed for minutes.

4.3 DivingRecirculating pumps feature a dual mechanical seal structure and lip seal organization, with mechanical seals ensuring...15000Operates reliably within hours without the need for replacement;

4.4 DivingRetrieved cable from recirculating pumpGB5013.2No Chinese content provided, please provide the news content to be translated.YZWType A rubber sheathed flexible cables or equivalent cables, featuring special vulcanization treatment on the cable sealing heads to prevent water leakage from the cable jacket into the motor, with a reliable protective device for the outer sheath.

4.5 DivingRecirculating pump surface coated with epoxy resin anti-corrosion paint, coating thickness exceeding300μmThe surface is glossy, free of sand holes and cracks, and the flow components are coated with epoxy resin anti-corrosion paint for protection.

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

4.7 DivingRecovery pump extracts cables with dual-color wires (yellow)/The grounding wire is specified to be reliable, with a clear grounding mark that is not easily worn off during use.

4.8 DivingImpeller blades and rotors of the recirculating pump are tested using dynamic balancing, with a balancing accuracy ofG6.3；

4.9 DivingThe stator winding of the recirculating pump is equipped with an electronic humidity sensor to prevent the motor winding from being damaged by moisture.

5Service Life

Submersible return pumps operate for an average of not less than15000Hour, the service life of the whole machine is not less than20Year.

6Structural Design

1Apologies, but there is no Chinese content provided for translation. Please provide the text you would like translated.

The internal recirculation pump features a direct-connected stamping structure, utilizes multi-stage motors, and has blades formed through stamping for high precision and efficiency. It boasts a compact design, small size, and light weight, with ease of operation and maintenance and a long service life. The housing is entirely made of stainless steel, presenting a beautiful and smooth appearance.

2Terminal box

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

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 bent backward, offering...Long-termThe automatic cleaning feature is securely fastened to the shaft with locking nuts, making it easy to remove and replace during lifting and maintenance.

4Motor

    Insulation grade for motor windingsFThe grade features a humidity sensor within the stator winding to prevent the motor winding from being damaged by moisture.

5Oil Chamber

    The oil chamber serves to lubricate and cool the sealing devices, bearing supports, and gears, as well as the motor and the liquid, providing shock absorption and noise reduction.

6Bearings

The service life of the inner circulation pump bearing is greater than80000Hour

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

7Axial Seal

The submersible recirculating 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 installed. Under normal circumstances, the motor's temperature does not exceed...85℃。

9）No Chinese content provided.MaterialsConfiguration:

Axle                                   Stainless Steel

Yi Wheel                                Stainless Steel

Housing                                 Stainless Steel

Fasteners                               Stainless Steel

Installed the system                             Stainless Steel

OO-Ring                               Nitrile Rubber70

Mechanical Seal                             Tungsten Carbide

7Control System

Each submersible recirculation pump is equipped with a control and protection signal line, featuring overcurrent, phase loss, short circuit, leakage, and overtemperature protection functions, along with corresponding signal indicators, ensuring reliable operation of the unit.

8Scope of Supply

QJB-W7.5 Submersible Recirculation Pump; Installation System (Wall Penetration Pipe, Hinged Gate); Control Cabinet.

The Submersible Recirculation Pump is designed as a complete submersible unit with a sealed connection. All components of the recirculation pump, including the motor and gear box, can operate continuously underwater. The pump propeller is driven by a submersible motor via a gear reduction. The rotating head features a streamlined cone shape and is compactly structured. The recirculation pump is connected to the wall penetration pipe flange with a guide vane. The mechanical contact surface of the recirculation pump, which requires a water-tight seal, is a precision-machined surface, utilizing metal-to-metal contact and employing nitrile rubber.OFormed ring. Recirculating pumps and their accessories, as well as cables, can all be continuously immersed in depths of20The rice stays submerged without losing its watertight integrity. All cast iron surfaces of the recirculating pump that come into contact with the liquid should be protected with a high-grade epoxy anti-corrosion coating system, with a standard thickness.320μ

DivingThe return pump installation system is primarily composed of hand winches, lifting frames, bracket bases, lifting chain hooks, guide rods, through-wall pipes, and butterfly valves, etc.

The dedicated installation system allows for quick assembly and disassembly of the recirculation pump (main unit) without draining the pool's wastewater. The wall penetration pipe is typically fixed within the wall using a two-shot casting method, while the hanger base and guide rod are secured with expansion bolts, eliminating the need for pre-drilled holes. To facilitate installation and maintenance, and prevent rust and damage to the pulley, the lifting chain for the recirculation pump's lifting system and the hand winch can be quickly installed and removed. Generally, each recirculation pump is equipped with a lifting ring chain, while the hand winch is shared among multiple units.