QJB-W2.5 Submersible Recirculation Pump Installation Diagram
Nitration liquid回流 pump price
Penetrating Wall Pump Quotation
Material: 304 Stainless Steel
Motor Power: 2.5 KW
Applicable Voltage: 380V
Jiangsu Du'an Environmental Protection QJB-W2.5 Recirculating Sludge PumpUtilizePerformance andProductStructure
（1）BackflowThe pump can automatically and securely connect to the drain coupling, and is able to Under the guidance of two parallel guide rods, the pump pit top slides freely to the pump connection bracket.
（2) The seal between the pump unit and the drainage connection is a leak-proof mechanical metal-to-metal contact.
（3) The main component of the pump is 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 pumping medium and the external coating of the pump are protected with alkyd primer and topcoat (Duasolid).
（4) The motor is capable of obtaining sufficient cooling from the surrounding environment and the medium being pumped, without the need for a cooling jacket or an external cooling system.
（5) The control cables and power cables are made with submersible cables. The outer sheath is made of low-absorption oil-resistant chloroprene rubber, allowing continuous use at depths of up to 20 meters without losing its waterproofing properties.
The cable entry seal design can eliminate certain torque to form a waterproof diving seal; the entry device ensures easy replacement of the cable. The control room and motor room are isolated by a junction board (or junction unit) to prevent 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 inflatable, 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 confirming the truth or other proof materials.). The stator is insulated by the drip method to ensure a full filling rate of the winding at least 95%. The stator should be heat-shrink embedded in the stator chamber. Bolts, pins, and other connecting devices requiring drilling into the stator casing are not acceptable. The motor should be designed for continuous operation with a medium temperature of 40℃ and capable of starting at least 15 times per hour. A thermosensitive switch should be installed in the stator lead winding to monitor the temperature of each phase winding. The set temperature for the switch to open is 140℃ and to close is 95℃, which can be connected to the motor overload protection and the control cabinet.
（7) The motor allows voltage fluctuations of +/- 10%, is designed to operate in high temperatures up to 40°C, and the average temperature of the stator windings should not exceed 85°C. A performance sheet showing torque, current, power factor, input/output power, and efficiency should be provided. This sheet should also include data on start-up and no-load characteristics. The motor and cable should be capable of continuous underwater operation, with a water-tightness that meets IP68 protection level requirements. The motor's rated power should be sufficient to ensure the agitator does not overload throughout its performance curve.Surveillance cables should include two. 1.5m² wire, used for connecting thermosensitive switches and optional protective sensors.
（8) The pump shaft rotates in 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 withstand radial and thrust forces.
Within the pump's performance curve range, the pump operates at its efficient working point at a rotational speed, designed lifespan 10,000 hours. The bearing can withstandLargerDesign Load 125%, and suitable for reverse.
（9) Each pump is equipped with an upper and lower double setIndividualOur mechanical sealing system employs a corrosion-resistant tungsten carbide material for the seals, which operate 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 fluid being conveyed, and are resistant to thermal shock. The sealing system does not rely on the medium supplied by the pump for lubrication. The mechanical seal is equipped with operating condition and fault display, alarm, and has a service life of 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 chamber fitted with anti-wear device -- helical grooves to remove deposited particles.
（12) All rotating components are properly statically and dynamically balanced to ensure normal full-speed rotation operation.Please provide the Chinese content to be translated.Under heavy load conditions, there has been no excessive vibration within the equipment, in the workshop, or in the surrounding vicinity, and the unbalance degree conforms. GB3216-82, AWWA and JSWAS standards. Pump Vibration Sensor VIS10: Installed in the pump top junction box, measures in one direction, outputs 4-20mA signal. Used to trigger alarms in cases of pump blockage, equipment failure, loose or damaged parts, and bearing issues.
（13) Per unitBackflowThe pump shaft seal system has an oil chamber.
（14）Sludge Recirculation PumpThe pump shaft and motor shaft form a single unit, continuous without interruption, not coupled together; the pump shaft is an extension of the motor shaft. Intermediate gearboxes or gear speed reducers are not used as they 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 solid, fibrous matter, sludge, and other substances commonly found in wastewater to flow unobstructed.
（16) The casing is a solid gray cast iron piece, with material grade ASTM A-48, 35B. The eccentric design features a sufficiently large smooth flow channel to accommodate particles entering the impeller.
（17) Oil chamber injects white wax lubricant that meets FDA 172.878 sanitation standards, free of aromatic hydrocarbons and processed according to FDA 172.878 sanitation standards.
（18) Provide Stator chamber leakage monitoring FLS (Std.), stator winding thermal switch (Std.).
（19) Provide essential cable fastening measures to ensure the stability of the cable within the pump's discharge pipe, preventing damage under the impact of the flowing water, and facilitating easy hoisting during pump maintenance.
（20) The pump can run continuously for 24 hours a day, start at least 15 times per hour, utilize surrounding liquid for cooling, and has a diving depth of up to 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 with a noise standard at the pump station boundary of ≤60dB(A) during the day and ≤50dB(A) at night; the vertical Z vibration level standard is ≤75dB during the day and ≤72dB at night.
Duwan Environmental Protection Recirculation Pump with Stainless Steel Electric Control Cabinet Instructions:
The electrical control cabinet features a complete power distribution system, protection, and measurement equipment, and is equipped with on-site start/stop switches for each sludge recycle pump. The electrical control cabinet is installed in an outdoor environment on-site, with a protection grade of IP55, and effectively resists erosion and corrosion from gases and steam emitted from wastewater. The electrical control cabinet housing is made of stainless steel.
The electrical control cabinet can display the incoming power current and voltage, as well as the temperature and humidity of each wall-mounted pump.Alarm signals and equipment operating status are indicated on the electrical control cabinet panel. The electrical control cabinet achieves overload and overheating protection.Phase failure and short-circuit protection, along with protective automatic shutdown during faults. The motor's starting equipment includes circuit breakers, contactors, and thermal overload relays.
Electrical control cabinet PLC Input/Output Interfaces. PLC Output: Start/Stop; PLC Input: Pre-Operation, Fault Signals. The electrical control cabinet is equipped with sufficient terminals for connecting power cables and control cables.
Electrical control cabinet housing is made of 304Stainless SteelOutdoor WaterproofIndoor construction with carbon steel spray coating.Column-mounted, Chint electrical components.
