Product Description
Product Overview
The QW/WQ submersible sewage pump series is designed for reliable sewage and wastewater discharge. It integrates a motor, pump, and seal into one compact structure, featuring high efficiency, strong anti-clogging capability, and stable operation. The motor is a water-filled type with protection devices, and the pump adopts single or double-channel impellers that allow solid particles and fibrous materials to pass through smoothly. The series covers flow rates from 7 to 5400 m³/h, heads up to 60 m, and power ratings from 0.75 to 280 kW, with discharge diameters from DN25 to DN600.
QW/WQ Series Type Designation
Scope of Application
The QW/WQ non-clogging submersible sewage pumps are widely used in municipal sewage treatment, civil engineering, industrial wastewater discharge, hospital and hotel drainage systems, and agricultural irrigation. They are suitable for pumping wastewater containing solids, fibers, and corrosive liquids, including sludge and raw sewage from plants or basements.
Working Conditions
The medium temperature should not exceed 60 °C, with a density ≤ 1.3 kg/dm³ and pH between 4 – 10. Stainless steel versions are available for mildly corrosive liquids. For optimal performance, pumps should be fully submerged and properly grounded. Custom configurations are available for special conditions.
Product Features
The QW/WQ series adopts single or double-vane impeller design, ensuring excellent non-clogging performance and strong solid-particle passage capability. The mechanical seal uses a new hard alloy material resistant to wear and corrosion, providing over 8000 hours of reliable operation. The stator insulation is Class F with automatic thermal protection, and the bearing system ensures long-term stability. Pumps can be equipped with automatic coupling for easy installation and maintenance.
Structure Diagram
(Product image)
The structure includes a cable, motor cover, stator, bearing, shaft, mechanical seal, pump casing, impeller, and base. The upper chamber houses the motor and wiring components, while the lower part integrates the pump impeller and oil chamber with double seals to ensure watertight separation and safe continuous operation.
Performance Parameters
(Product table)
Models range from 25WQ9-12-0.75 kW to 600WQ3500-15-200 kW, with flows from 7 – 5400 m³/h and heads from 7 – 60 m. Standard motor speed is 1450 / 2900 r/min. Coupling types: GAK-50 ~ GAK-600.
Installation and Structure
The WQ fixed and QW movable types allow flexible installation. The fixed type uses automatic guide rail coupling for quick removal and maintenance, while the movable type can be placed directly at the working site. Structure materials include cast iron casing, stainless shaft, and optional impeller materials for specific fluids.
Use Safety
Ensure correct rotation before operation. The power supply must include leakage protection. Regularly check insulation, mechanical seal condition, and cable integrity. Avoid running the pump out of water or at low submersion depth. Periodically inspect bearings and replace lubricating oil every 3000 hours.
Ordering Instructions
When ordering, specify model, flow rate, head, speed, motor power, voltage, frequency, medium properties, installation type (fixed or movable), and required accessories. For special materials or voltages, consult technical service before purchase.
OEM & Custom Solutions
We provide OEM/ODM customization for global clients. Options include stainless steel versions, explosion-proof motors, extended cables, control panels, auto-coupling sets, and custom voltage/frequency configurations. Pumps can be tailored for municipal, mining, marine, or industrial wastewater systems, ensuring efficiency and long-term reliability.
FAQs for Oversea Buyers
Q: What’s the main difference between QW and WQ types?
A: QW is a movable installation type, while WQ is fixed with automatic guide rail coupling for easier maintenance.
Q: Can the pump handle solid or fibrous waste?
A: Yes, the impeller design allows passage of solids up to 80 mm depending on model, preventing clogging.
Q: What materials are available?
A: Standard models use cast iron; optional stainless steel or duplex materials are available for corrosive media.
Q: What voltages and frequencies are supported?
A: Standard voltages 380 V/50 Hz; custom 220 V, 415 V, or 60 Hz versions are available upon request.
Q: How is maintenance performed?
A: Pumps use modular designs with quick-release seals and auto-coupling for easy inspection and part replacement.
Q: Do you provide control panels or float switches?
A: Yes, intelligent control cabinets and float switches can be supplied with the pump system.
Q: What export markets do you serve?
A: Our pumps are exported to Southeast Asia, Africa, South America, and the Middle East, meeting ISO and CE standards.