Product Overview
The WQ Series Non-Clog Submersible Sewage Pump represents a modern approach to wastewater handling, combining advanced hydraulic design with robust construction. Developed for demanding sewage and wastewater applications, this pump series features anti-clogging capabilities, automatic installation systems, and intelligent control options.
The WQ and WQK variants both fall under the submersible sewage pump category, differentiated primarily by the presence of a cutting mechanism. The WQ type focuses on non-clog discharge with large passage capacity, suitable for general sewage containing solid particles and fibrous materials. The WQK type incorporates a cutting mechanism that macerates long fibers, cloth strips, and other tangle-prone materials before discharge, making it better suited for applications with high debris content.
Key Features
- Large-Passage Anti-Clog Design: Hydraulic components designed with large flow channels that effectively pass fibrous materials up to 5 times the pump diameter and solid particles approximately 50% of the pump diameter.
- Single or Double Channel Impeller: The impeller undergoes dynamic and static balance testing, improving operational efficiency and reducing vibration during operation.
- Double Series Mechanical Seal: Made from hard corrosion-resistant tungsten carbide, enabling safe continuous operation for over 8,000 hours.
- Compact Structure: The integrated motor-pump design shares a common shaft (rotor), resulting in a short overall length. No pump house construction required – the unit operates fully submerged.
- Oil-Water Probe Protection: Sensors in the oil chamber detect water ingress when mechanical seals are compromised, triggering protective signals.
- Automatic Control Cabinet: Optional full-protection control cabinet monitors leakage, phase loss, short circuits, overheating, and motor overload conditions.
- Double-Rail Automatic Coupling System: Simplifies installation and maintenance without requiring personnel to enter sewage pits.
- Float Switch Control: Automatically starts and stops the pump based on water level changes, eliminating the need for dedicated operators.
- Water Jacket External Circulation Cooling: Allows safe operation in dry conditions (without submersion) when equipped with this cooling system.
- Dual Installation Options: Fixed automatic coupling installation or mobile free installation to suit different application requirements.
Technical Specifications
Model Designation
| Code | Description |
|---|---|
| 80 | Nominal Discharge Diameter (mm) |
| JY | With Agitation Device |
| WQ | Submersible Sewage Pump |
| P | Stainless Steel Material |
| B | Explosion-Proof Type |
| 40 | Rated Flow (m3/h) |
| 15 | Rated Head (m) |
| 4 | Rated Motor Power (kW) |
Operating Conditions
| Parameter | Specification |
|---|---|
| Media Temperature | 60 deg C max |
| Specific Gravity | 1.0-1.3 kg/dm3 |
| pH Range | 5-9 |
| Motor Insulation Class | Class B or F |
| Submersion Limit (without self-cooling) | Motor portion not exceeding 1/2 above liquid level |
| Motor Current | Must not exceed rated current during operation |
| Minimum Operating Head | Not less than 60% of rated head |
Installation Guide
Pre-Installation Checks
- Inspect cables for damage, verify all fasteners are secure, and check for deformation or damage from transport and storage.
- Use a 500V megohmmeter to measure insulation resistance between phases and from phase to ground. Values should not be less than 2 Mohm. If below threshold, dry the motor stator winding at temperatures not exceeding 120 deg C.
Installation Methods
Fixed Automatic Coupling Installation: Thread lifting chains through the two lifting eye bolts or lifting plates (positioned away from the discharge outlet, with the chain parallel to the outlet). Lift the pump evenly and slowly along the guide rails until the automatic coupling engages fully.
Mobile Free Installation: Connect the discharge hose first, then thread lifting chains through the two eye bolts to lower the pump into position. Never use the power cable as a lifting strap.
Electrical Connection
- Rotation direction is counter-clockwise when viewed from the inlet. If reversed, swap any two power cable conductors.
- Ground the pump housing according to applicable regulations. Never enter the water while the pump is operating.
- The pump must be equipped with an automatic control cabinet. Do not connect directly to the grid or use knife switches.
Applications
- Municipal wastewater treatment plant discharge systems
- Municipal engineering and construction site drainage
- Residential sewage pumping stations
- Civil air defense system drainage stations
- Hospital and hotel wastewater discharge
- Factory and commercial heavily polluted wastewater discharge
- Mining and exploration site drainage
- Rural biogas digesters and agricultural irrigation
- Water treatment plant supply systems
Frequently Asked Questions
What is the difference between WQ and WQK models?
The WQ type focuses on non-clog discharge with large passage capacity for general sewage. The WQK type includes a cutting mechanism that macerates fibrous materials and debris, making it more suitable for high-debris applications.
How long can the pump operate continuously?
With the tungsten carbide double series mechanical seal, the pump is designed for safe continuous operation exceeding 8,000 hours.
What maintenance is required?
Replace or replenish oil in the oil chamber every 300-500 operating hours. After pumping thick or viscous slurries, run the pump in clean water for several minutes to prevent deposits. When not in use for extended periods, remove the pump from water to reduce stator winding moisture exposure.
Can the pump operate above water?
Models without a self-circulating cooling system must not operate with the motor fully exposed above the liquid surface for extended periods. Models equipped with a water jacket external circulation cooling system can operate safely in dry conditions.
Why Choose Chaodun
Chaodun Pump manufactures the WQ Series with proven hydraulic performance and reliable construction. The single or double channel impeller design, combined with tungsten carbide mechanical seals and comprehensive protection systems, delivers dependable operation across municipal, industrial, and commercial wastewater applications. For project specifications and custom configurations, contact our engineering team.