Device commonly known as: diving sludge return pumps, sewage reflux pump, sludge return pumps, sludge treatment, reflux pumps, sludge pumps, sludge return, diving reflux pump, sludge return pumps, mixed reflux pump, sludge pressure filtration pump range QJB-W-type sludge return pumps are submersible mixer in production technologies based on the development of new products, the pump for the two sewage treatment plants was refluxed, denitrification equipment, can also be used When drainage pumping ground water purification; irrigation and control of waterways system; wastewater treatment process or mud suction recirculation loop requires micro-head, high-traffic locations. Conditions 1, continuous operation, the medium temperature is not higher than 40 ℃; 2, medium PH value 6-9. 3, the maximum submergence 10m. Structure referred to as a device designed to make spare parts and equipment for sludge return pump to achieve the best performance. 1, the cable: cable using a special watertight cable; 2, junction boxes: junction box is completely closed, and the surrounding liquid and the stator case is isolated; 3, motor: 50Hz three-phase squirrel cage induction motor diving, F class insulation, Protection class IP68. Motor cooled by the surrounding medium; 4-axis: the motor shaft made of stainless steel rotor for balancing test; 5, Seal: static seal is an O-ring. The shaft seal is a mechanical seal, the oil chamber and the surrounding dielectric isolation; 6, bearing: imported bearings, the design life of up to 100,000 hours; 7, the oil chamber: oil for lubrication and cooling mechanical seal friction and isolation permeate; 8, Impeller: the impeller own three blades, blade width and thin, smooth surface was swept style, efficient, unimpeded operation, and has self-cleaning function; 9, imported cone: The purpose of the import is to form a cone The best flow state; 10 discharge connector: connector for the discharge tube fixed on imports of tapered outlet; 11, the guide: guiding device consists of two tubes (catheters) and composed of the upper conduit clamps. Product Features 1, according to the micro-lift specially designed high flow, high efficiency; 2, anti-clogging, winding, reliable; 3, using the latest sealing materials can be safely more than 10,000 hours of continuous operation; 4, compact structure, easy installation and maintenance; 5, the host using stamping structure, small size, high accuracy, corrosion resistance no noise; 6, equipped with drain leakage and motor overload protection (alarm) devices to ensure product safety and reliability. Model Motor Power (kW) Rated Current (A) impeller diameter (mm) Protection class Insulation class Nominal Diameter (mm) QJB-W 1.5 1.5 4.1 400 IP68 F 400 QJB-W 2.5 2.5 6.8 400 IP68 F 400 QJB-W 4 4 15 615 IP68 F 600 QJB-W 5 5 16 615 IP68 F 600 QJB-W 7.5 7.5 23 615 IP68 F 600 QJB-W 10 10 30 615 IP68 F 600 QJB-W 15 15 42 615 IP68 F 600 QJB-W 18.5 18.5 52 615 IP68 F 600 features an installation, the correct installation of the pump can be a long, normal operation of the basic guarantee 2, the sludge return pump with automatic coupling installation system without any mechanical lifting equipment can quickly disassemble for inspection and maintenance, installation quick and easy. 3, in addition to the equipment needs of embedded wall pipe, the guide rod from steel hanger bolts are connected with the cell body, no embedded parts. 4, embedded parts procurement and shoot the door installed by the user, the user should pay attention to order. Selection of parameters to be provided: flow, head, need to provide power when the motor Inquiry: motor power, impeller diameter, if you need to install the system