Duwan Environmental QJB-W10 Through-the-Wall Recirculating Pump Instructions:
Duwan Environmental QJB-W10 Through-the-WallThe return-through-wall pump should be a complete set, which requires accessories such as a local control box, stainless steel double rods, stainless steel lifting chains, jib, hoist, through-wall pipe, butterfly valve, and cables from the control box to the equipment for safe operation.
Jiangsu Du'an Environmental Protection QJB-W10 Wall Penetration Recirculation Pump Structure and Working Principle
Mixed liquid回流 and denitrification nitrogen removal treatment equipment for two-stage wastewater treatment plants. Also suitable for applications requiring low head and high flow, such as surface drainage, irrigation, and wastewater recycling processes.
Job Characteristics:
Compact structure, easy installation, simple operation, easy maintenance, and noise-free, it can be installed anywhere with ease.
The submersible recirculation pump is composed of a propeller, submersible motor, flow guide hood, wall penetration pipe, flap, lifting guide rod, hoisting rope, underwater cable, lifting frame, hand-cranked lifting mechanism, angle steering device, and local control cabinet.
The submersible recirculation pump operates smoothly with no locking up, stalling, or vibration issues.
Submersible recirculation pump undergoes a sealed pressure test; test pressure is0.3 MPa, no leakage observed for 5 minutes.
Submersible recirculation pumps feature a dual mechanical seal and lip seal configuration to form the dynamic sealing system, with mechanical seals ensuring inOperates reliably for 25,000 hours without the need for replacement.
The submersible recirculation pump can continuously operate under both full immersion and when the submersible motor is exposed to the liquid surface. It also ensures normal operation upon startup after intermittent operation or long-term shutdown.
Submersible recirculation pump cable extractionThe YZW type rubber sheathed flexible cable or other cables with equivalent performance, as specified in GB5013.2, come with a standard configuration length of 10 meters. The cable sealing heads are treated with a special process to prevent the cable jacket from being damaged and water from渗入 the motor.
The submersible recirculation pump features a smooth and pristine 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 seal leakage protection device.
Submersible Recirculation Pump Cable with Dual-Color Wires (Yellow)/Green) is designated as the ground wire, ensuring reliable connection. The ground marking is distinct and not easily worn off during use.
Submersible return pump impellers and rotors undergo dynamic balancing tests, with a balancing accuracy ofG6.3；
The submersible recirculation pump features thermal protection switches within the stator winding and at the upper and lower bearing positions, as well as a sealing leakage protection device inside the stator cavity.
The installation rod for the submersible return pump ensures the equipment can rotate freely, rise and fall, and adjust various angles. There's no need to empty the pool when lifting and installing the agitator.
Service Life
Submersible return pumps operate under specified conditions,InitialPrior to the fault, the average runtime was no less than10,000 hours
Service Life of Complete Machine Not Less Than20 years.
Structural Design
Propeller
Utilizing a sweptback reverse twist curve design, crafted from stainless steel and subjected to dynamic balance testing and meticulous processing, it boasts high...PerformanceTransmits motor output power effectively. To prevent clogging of the impeller and to avoid loosening between the impeller and the shaft during operation, an internal locking mechanism has been adopted in the fixed structure of the impeller.
Motor
The motor and impeller of the submersible recirculating pump are directly coupled, and the insulation grade of its winding isF GradeNo Chinese content provided for translation.High operating temperature available155OC, Electric MotorsPlease provide the Chinese content that needs to be translated into American English.Under heavy loads, there will be no overload phenomena, and the motor can start every hour.15 times, but the intervals should be evenly distributed. The motor stator is embedded 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 service life of the bearing in submersible recirculation pump is greater than100,000 hours
Axial Seal
The submersible recirculation pump is composed of two mechanical seals and one lip seal. The external seal chamber is equipped with a spiral.
Grooves are designed to remove impurities and reduce wear on the machine seal. Seal material: Tungsten CarbideTungsten Carbide
Monitoring System
Three normally closed thermal switches are installed in the stator winding, with the thermal switches connected in series.140OC Action.
The motor stator cavity and oil chamber are equipped with leak detectors to monitor dynamic and static seal leaks, and to timely disconnect the power supply.
Through-the-Wall Recirculating Pump Supply Range (including but not limited to the following):
(1) Fully assembled internal recirculation pump
(2) Monitoring Unit
(3) Complete lifting system
Each pump requires a minimum of 10 meters of underwater cable.
All connecting attachments, embedded parts, and foot bolts.
(6) Three-year supply of spare parts
