Duwan Environmental QJB-W4/12 Horizontal Through-Wall Pump

Fitting rod, lifting device, wall penetration pipe, shutter door

Wall Penetrating Recirculating Pump Structure Description:

（1Cable entry seal

The cable entry seal is a complete unit with a fixed plate. The cable entry is strictly guaranteed for waterproof and submersion sealing.

（2Motor

Three-phase squirrel-cage induction motor, shell design, filled with air inside the shell, direct-start type. Motor can continuously stir 40Medium of ℃, per hourPlease provide the Chinese content you would like to have translated into American English.The number of major startup times 15 The intervals between each startup are evenly spaced.

The motor's design allows for voltage fluctuations ±5Provide its rated output within % range. As long as the motor does not overheat and is not operating at full load continuously, ±10The voltage deviation from the rated value of % is also acceptable. The motor allows for an inter-phase voltage imbalance of2Within %. The stator is cooled by the surrounding liquid. Cable diameter greater than.1．5mm2 Connect thermal switches and optional protective sensors; cable sheath is resistant to wastewater corrosion.

（3Mechanical Seal

Recirculation pumpEquipped with two independent mechanical sealing systems. Sealing elements operate in the oil cavity, using liquid power to spray oil at a constant rate onto the sealing surface for lubrication. The external primary sealing component is located between the agitated liquid and the oil cavity, containing a stationary and positively driven rotating tungsten carbide ring. The internal secondary sealing element, positioned between the oil cavity and the motor housing, includes a stationary tungsten carbide ring and a positively driven rotating tungsten carbide ring. Only the external sealing surface comes into contact with the agitated medium. Each sealing interface is secured with a spring system. The sealing does not require maintenance, adjustment, or rotation direction specification. The oil cavity is filled with paraffin-type white oil, which does not contain aromatic hydrocarbons.

（4Bearings

Impeller shaft and motor shaft form an integral unit.,The motor features two fully enclosed deep groove ball bearings internally. The main bearing is a single-row spherical roller bearing to bear axial loads, with a service life of not less than10 10,000 hours.

（5Oil Chamber

Oil serves as a lubricant and coolant for the seal, and also acts as an additional barrier for any penetrating liquids. The pressure accumulated in the oil chamber is mitigated through an internal volume space.

（6Impeller

The impeller is three-bladed, with wide blades, thin sides, a smooth surface, and a swept-back design. This self-cleaning feature ensures the efficient and clog-free operation of the mixer.

（7Protect

1)All motors feature thermal switches connected to each phase winding, connected in series, with the thermal switches in

125At °C, the motor stops rotating and an alarm sounds.

2)The motor room is equipped with humidity sensors, providing an alarm monitor for temperature and humidity overlimits for each sludge recycle pump. In case of overlimits, the control circuit immediately stops the sludge recycle pump to protect the motor, with the alarm monitor located in the electrical control cabinet.

（8Impeller shaft

The impeller shaft and motor shaft are one and the same, ensuring smooth and efficient operation of the motor.

（9Cooling System

The motor can be adequately cooled by the surrounding liquid being agitated.

Recirculating pumpOxidation Ditch System3TaiQ=667m3/h,P=18.5kw。MBRSystem membrane pool return to aerobic pond pumpQ=2500m3/h，H=1.2m，P=18.5kw，6Taiwan, aerobic to anaerobic backflow pumpQ=2850m3/h，H=1.5m，P=30kw，6Taiwan, anaerobic回流泵Q=2100m3/h，H=1.0m，P=11kw，4Taiwan）

Sludge Recirculation Pump Supply Range:

Each complete wall penetration pump set consists of the main unit, installation system, and electrical control equipment. It is fully equipped with accessories, fasteners, spare parts, protectors, local control cabinets, junction boxes, and the required cables necessary for safe, effective, and reliable operation.

The complete wall-penetrating pump set includes the following components:

（1) The main unit consists primarily of a impeller, submersible motor, guide body, and guide pulley. The impeller is directly mounted on the submersible motor shaft, while the submersible motor is fixed within the guide body.

（2The installation system primarily consists of hand winches, lifting columns, suspension brackets, lifting chain hooks, lifting hooks, guide rods, wall penetration pipes, and gate valves, etc.

（3Each Submersible Pump's Underwater Cable10m；

（4Electrical protection components, including short circuit, overload, phase loss protection, etc.

（5Wall-thrust pump protective components include humidity protection, temperature protection, and protection controllers, etc.

（6Local control cabinets and junction boxes, etc.

（7All connecting accessories, all fasteners for installation(Including stainless steel chemical anchor bolts, nuts, washers, etc.)；

（8Two years of spare parts and tools.

Installation and Usage Precautions for Horizontal Recirculation Pumps:

Installation sequence for the mixed liquid recirculation pump:

Wall Penetration Pipe (When installing, pay attention to the length of the wall penetration pipe extending beyond the wall, and compare its position with the guide rod. Once the position is confirmed, secure it in place.)

→ Pilot bar (note: the top and bottom must be securely fixed, ensuring vertical alignment on a single line to avoid uneven stress due to bar tilt)

→ Gate valve (the flange connected to the through-wall pipe needs to be fully welded)

→ Hanging bracket base (position it well, do not place it too far from the guide rod)

→ Lifting Frame   304Stainless steel material

→ Hand Winch Galvanized or 304 stainless steel material

→ Hoisting Chain with Eye (traction-type, equipped with several adjustment holes above the lifting frame; the chain must be vertically aligned to ensure the机身 is straight when lowered into the pool, preventing the occurrence of guide rod jamming.)

→ Recirculation Pump  Full copper coil motor

→ Cable Fixation (After the installation of the回流泵 is completed, please pay attention to the flange position of the wall penetration pipe of the agitator; straighten the cable and secure it before starting the machine. If you need to lift the回流泵, please make sure to turn off the power, protect the cable, and avoid damaging the cable during the lifting process. Pay attention to cable protection during installation as well; do not place the cable ends in water. The cable is a vulnerable part of the agitator, please ensure the machine is running before proceeding.)PreviouslySecure and protect (securely, protect)