QJB-W4 Wall Penetrating Pump Installation Diagram
Underwater Penetrating Pump Price
QJB-W Underwater Penetrating Pump Quotation
Motor Pole Number: 6-Pole
Jiangsu Du'an Environmental Protection Recirculation PumpAll components, devices, accessories, matching equipment, and the required material specifications, materials, power ratings, performance curves, etc.Technical Agreement and After-Sales ServicePrices are itemized in the quotation sheet.
The scope of supply should cover all the equipment necessary for the normal operation of submersible pumps. This includes each set of submersible sludge pump, along with the required coupling base, pump guide rail, lifting chain, pump outlet connection, bolt fasteners, submersible cable, etc., ensuringReplacement parts operating normally within the warranty period. Suppliers must also consider that different submersible centrifugal pumps must be suitable for various working applications, requiring different pump characteristics and accessories.
Jiangsu Du'an Environmental ProtectionSupplies the operation and installation of the回流污泥泵, including all necessary accessories, and is responsible for installation until it runs smoothly.
Recirculating Sludge PumpsWorkArt conditions：
Recirculating Sludge PumpsUtilizePerformance &ProductStructure
（1）RecirculationPumps can automatically and securely connect to the drain coupling, and are capable of Under the guidance of two parallel guide rods, the pump pit top slides freely to the pump connection flange.
（2) The seal between the pump unit and the drainage connection flange is a leak-proof mechanical metal-to-metal contact.
（3) The main components of the pump are made of DIN1691, GG25G gray cast iron, with a smooth surface free of sand holes or other casting defects. All exposed bolts and nuts are made of AISI-304 stainless steel or higher-grade materials. In addition to stainless steel, all metal surfaces in contact with the pump medium and the external coating of the pump are protected with alkyd primer and topcoat (Duasolid).
（4) The motor is sufficiently cooled by the surrounding environment and the medium being pumped, without the need for a cooling jacket or external cooling system.
（5) Control and power cables utilize underwater-sealed submersible cables. The outer sheath is made of low-absorbent oil-resistant chloroprene rubber, ensuring continuous operation at a depth of 20 meters without losing its waterproof properties.
The cable entry seal design eliminates certain torque to form a waterproof diving seal; the entry assembly ensures easy replacement of the cable. The switchgear room and motor room are isolated by a junction board (or junction unit), preventing foreign matter from entering the stator chamber from the top of the pump.
（6) The motor should be a squirrel-cage induction motor, housed in an inflated, waterproof casing. The insulation level of the stator winding and stator conductors is H class 180℃ (provide a color-printed product sample with the manufacturer's seal to verify authenticity or other proof materials.). The stator is insulated by the drip method, ensuring a winding filling rate of at least 95%. The stator should be heat-shrink embedded in the stator chamber. Bolts, pins, and other connecting devices that require drilling holes in the stator casing are not acceptable. The motor should be designed to continuously handle stirring of a medium at 40℃ and can start up at least 15 times per hour. A thermosensitive switch should be installed in the stator input coil to monitor the temperature of each phase winding. The thermosensitive switch is set to open at 140℃ and close at 95℃, and can be connected to the motor overload protection and to the control cabinet.
（7) The motor permits voltage fluctuations of +/- 10%, and is designed to operate in high temperatures up to 40℃, with the average temperature of the stator windings not exceeding 85℃. A performance sheet that displays torque, current, power factor, input/output power, and efficiency should be provided. This sheet should also include data on startup and no-load characteristics. The motor and cable should be capable of continuous underwater operation and meet the IP68 waterproofing protection grade requirements. The rated power of the motor should be sufficient to ensure the agitator does not overload throughout its performance curve.Supervisory cables should include two wires 1.5m² wire, used to connect thermosensitive switches and optional protective sensors.
（8) The pump shaft rotates within two bearings continuously lubricated with grease. The upper bearing is a single row ball bearing. The lower bearing is a double row angular contact ball bearing, designed to bear radial forces and axial thrust.
Within the pump's performance curve range, the pump operates at its effective working point at a speed, designed lifespan 10,000 hours. The bearing can withstandLargerDesign Load 125%, and suitable for reverse.
（9) Each pump comes with an upper and lower double configurationIndividualOur mechanical sealing system features mechanical seals made of corrosion-resistant tungsten carbide material, operating within an oil cavity. This cavity lubricates the overlapping sealing surfaces at a stable flow rate.
Mechanical seals are maintenance-free, with lubrication separated from the conveyed fluid, capable of withstanding thermal shock, and the sealing system does not rely on the medium supplied by the pump for lubrication. The mechanical seal is equipped with operational condition and fault display, alarm, and its service life is not less than 30,000 hours.
（10) Each sealed interface must be connected by its own spring system. The mechanical seal operates normally in both clockwise and counterclockwise rotations.
（11) External mechanical seal cavity fitted with anti-wear device – helical grooves to remove deposited particles.
（All rotating components are properly statically and dynamically balanced to ensure smooth operation at full speed and under normal conditions.Please provide the Chinese content you would like translated into American English.Under heavy load conditions, there has been no excessive vibration in the equipment, in the workshop, or in the surrounding vicinity, and the unbalance degree meets GB3216-82, AWWA, and JSWAS standards. Pump Vibration Sensor VIS10: Installed in the pump's top junction box, measures in one direction, and outputs a 4-20mA signal. Used to trigger an alarm in case of pump blockage, equipment failure, loose or damaged parts, and bearing issues.
（13) Per unitBackflowThe shaft sealing system of the pump features an oil chamber.
（14）Sludge Recirculation PumpThe pump shaft and motor shaft form a single unit, continuous without interruption, not using a coupling design; the pump shaft is an extension of the motor shaft. A middle gear box or gear reducer is not used as this would reduce efficiency and increase maintenance costs.
（15) The material of the impeller isSU304 Stainless SteelAchieves dynamic balance. Long flow channels with no sharp turns, ensuring the impeller has excellent flow characteristics, allowing solids, fibers, sludge, and other substances commonly found in wastewater to pass through without obstruction.
（16) The casing is a whole piece of gray cast iron, material grade ASTM A-48, 35B. Eccentric design with sufficiently large smooth flow channels to accommodate particles entering the impeller.
（17) Oil chamber injection with white paraffin lubricating oil that meets FDA 172.878 sanitation standards, free of aromatic hydrocarbons and processed in accordance with FDA 172.878 sanitation standards.
（18) Provide Stator chamber leakage monitoring FLS (Std.), stator winding thermal switch (Std.).
（19) Provide essential cable fixation measures that ensure the stability of the cable within the pump's discharge pipe, preventing damage under the impact of the flowing water, and facilitate easy hoisting during pump maintenance.
（20) The pump can operate continuously for 24 hours a day, can be started at least 15 times per hour, is cooled by the surrounding liquid, and has a diving depth of 20 meters.
（21) The installed equipment must operate without any abnormal noise or vibration, in compliance with the provisions of GB10890-89 "The Noise Standard for Urban Areas of the People's Republic of China." Ensure that all installed equipment operates at a noise level within the pump station boundary of ≤60dB(A) during the day and ≤50dB(A) at night; and a vertical Z vibration level of ≤75dB during the day and ≤72dB at night.
Duwan Environmental QJB-W Type Wall Penetration Pump, Submersible Recirculation PumpMain Components and Supply Scope (not limited to these):
A. Complete underwater internal recirculation 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 the number of equipment)
F. Hangers and Lifting Devices
G. PerTaiRecirculation pump required10-meter underwater cable and fixtures, connectors, fasteners
Leakage and Overheat Protection Device
I. All connecting accessories, chemical anchor bolts
Warranty: 18 months
Pre-Tax & Shipping
