Internal Recirculation Pump QJB2.5
Sludge internal recirculation pump model and specifications
Submersible internal recirculation pump price
Motor Power: 2.5 kW
Material: 304 Stainless Steel
Wall penetration pipe, door closer, guide rod, and lifting device
Model Technical Specifications | QJB-W2.5 |
Trafficm3/h | 416 |
Lift h | 0.9 |
Power Rating kw | 2.5 |
Impeller diameter mm | 400 |
Impeller Speedr/min | 740 |
Water Push Power N | 800 |
Motor Protection Class | IP68 |
Motor insulation grade | F |
Wall Penetration Pipe to Pool Top Distancem | 5.6 |
Electricity Source | 380V , 3ph , 50Hz |
Numbers Quantity Set | 3 |
Application
Duwan Environmental QJB-W2.5The internal recirculation pump is a treatment equipment for the mixed liquid recirculation and denitrification nitrogen removal in a two-stage sewage treatment plant. It can also be used in places requiring low head and high flow, such as surface drainage, irrigation, and wastewater recycling processes.
Features
Tightly structured, easy to install, simple to operate, easy to maintain, and noise-free, it can be installed at will.
Application Scope
Submersible recirculation pumps can operate continuously under the following conditions:
Altitude not exceeding1000m；
Please provide the Chinese content to be translated.Medium temperature not exceeding40OC；
MediumpH between 5-9.
Liquid density does not exceed1150kg/m3；
Extended dive operations, dive depths generally do not exceed20m；
Structure and Working Principle
Submersible return pumps are composed of a propeller, submersible motor, guide flow cover, through-wall pipe, flap gate, installation lifting rod, lifting rope, underwater cable, lifting frame, manual hoisting and lowering device, angle turning device, and on-site control cabinet.
The diving return pump rotates smoothly without any phenomena of jamming, stalling, or vibration.
The submersible recirculating pump undergoes a sealed pressure test, with the test pressure being0.3 MPa, no leakage observed for 5 minutes.
Submersible recirculation pumps are equipped with a double mechanical seal and lip seal to form a dynamic sealing system, ensuring mechanical seals in the pump.Operates reliably for 25,000 hours without replacement.
The submersible recirculation pump can continuously operate under conditions of full immersion and when the submersible motor is exposed to the liquid surface. It also ensures that it can run normally upon startup after operating in an intermittent mode or being shut down for a long period.
Submersible recirculation pump with extraction cableYZW-type rubber sheathed flexible cables or equivalent cables as specified in GB5013.2, with a standard configuration length of 10 meters per unit. The cable sealing heads are treated with special procedures to prevent the cable jacket from being damaged and water from渗入 the motor.
The submersible recirculation pump features a glossy surface, free from any signs of dirt, scratches, or cracks.
The oil chamber of the submersible recirculation pump has ample space to accommodate expansion caused by temperature differences, and is equipped with a sealed leakage protection device.
Submersible recirculation pump lead cable with dual-color wire (yellow)/Green) specified as ground wire, with reliable connection. Grounding symbol is prominent and not easily worn off during use.
Submersible recirculation pump impeller and rotor are tested for dynamic balancing, with a balancing accuracy ofG6.3；
The submersible recirculation pump is equipped with thermal protection switches within the stator winding and at the upper and lower bearing positions, and a sealing leakage protection device is installed inside the stator cavity.
The installation rod of the submersible recirculation pump ensures the equipment can rotate freely, ascend and descend, and adjust various angles, making it unnecessary to empty the pool for lifting and installing the agitator.
Service Life
Submersible recirculating pump under specified conditions,InitialAverage operating time before the last failure was not less than10,000 hours
Service life of the entire unit is not less than20 years.
Structural Design
Blade wheel
Utilizing a sweptback reverse twist curve design, crafted from stainless steel and subjected to dynamic balance testing and meticulous processing, it offers highPerformanceTransfers motor output power. To prevent blockage and slag formation in the impeller, and to avoid loosening between the impeller and shaft during operation, an internal locking device is utilized in the impeller's fixed structure.
Motor
The motor and impeller of the diving recirculation pump are directly coupled, and its winding insulation grade isGrade FPlease provide the Chinese content to be translated.High working temperature up to155OC, MotorPlease provide the Chinese content you would like translated into American English.No overload will occur under high load conditions; the motor can start every hour.15 times, but the time intervals should be even. The motor stator is inserted into the housing using the heat shrink method, without the need for any locating pins, ensuring a firm and reliable fit. Under normal conditions, the motor's temperature rise does not exceed 80OC。
Bearings
The motor rotor is supported by a double-row angular contact ball bearing and a cylindrical roller bearing.
The operational lifespan of the diving recirculation pump bearings is greater than100,000 hours
Axial Seal
The submersible recirculating pump consists of two mechanical seals and one lip seal. A spiral is set inside the outer seal cavity.
Grooves for cleaning impurities and reducing wear on the mechanical seal. Seal device material: Tungsten Carbide/Wolfram carbide.
Monitoring System
The stator winding contains three normally closed thermal switches connected in series, with the thermal switches in140OC Action.
The motor stator cavity and oil chamber are equipped with leakage detectors to monitor dynamic and static seal leaks, and to timely cut off the power supply.
Du'an Environmental Protection Equipment (Jiangsu) Co., Ltd.After-sales service
After-sales service is crucial for the development of our business and the establishment of our company's reputation, and it is also an important step for a company to advance. To the customers, it ensures product quality and provides peace of mind.
1. We uphold the principle of customer first; all products produced by our company meet stringent corporate standards and national mechanical department standards.
2. Provide spare parts, accessories, installation, debugging, and maintenance services promptly according to customer requirements or agreements, as well as technical training for relevant personnel of the customer.
3. Production, testing, and inspection for large-scale engineering projects will be organized according to the bid documents' requirements, and we will cooperate with the customer for on-site acceptance.
4. Strictly organize the procurement of raw materials and components, as well as the production and inspection of products, in accordance with ISO 9001 standards.
5. Under normal storage, transportation, maintenance, and usage conditions of the customer, provide a three-in-one service (warranty, return, and exchange) for any product that cannot be used normally due to manufacturing quality issues.
6. Provide necessary technical documents and product certification for factory-finished goods.
7. During the warranty period, if the equipment fails to meet the specified technical parameters due to incorrect equipment or technical documentation provided by us, the user should immediately notify us. We will replace or repair the defective equipment or documentation within 24 hours upon receiving written or verbal notice.
8. In case of damage or abnormal operation due to improper use by the customer or outside the warranty period, our company offers lifetime repair services for the product.
