What Is a YW Submerged Sewage Pump?
The YW submerged sewage pump (also known as a YW submersible sewage pump or vertical submerged wastewater pump) is a specialized, heavy-duty electric pump designed for complex sewage conditions involving high solid content, long fibers, and deep submersion. By combining a robust double-blade hydraulic impeller with an advanced oil-chamber mechanical seal, it effectively solves common problems such as fiber clogging, seal leakage, and hazardous underwater maintenance.
Whether you are upgrading a municipal drainage station, handling industrial wastewater with high impurity loads, or managing basement sewage for a commercial complex, the YW vertical submerged pump offers a reliable, long-life solution with minimal downtime.
Key Features & Benefits
Extended Service Life (≥12 Years)
The pump features a long-lasting mechanical seal housed in an isolated oil chamber, combined with wear-resistant alloy flow components. This design prevents dry-running damage and corrosion, extending the service life by over 40% compared to standard single-seal pumps.
Significant Energy Savings (20%–30% Reduction)
Equipped with a double-blade hydraulic model and intelligent liquid-level control, the pump operates at ≥74% efficiency under rated conditions. The system automatically prevents idling, reducing annual electricity costs significantly.
Reduced Maintenance Costs
The guide-rail automatic coupling system and external seal design allow for easy installation and maintenance without requiring personnel to enter the sewage pit. A single operator can complete pump lifting and seal replacement in just 45 minutes, cutting labor costs by 55%.
Compact & Lightweight Design
The integrated structure eliminates the need for a separate pump house or heavy base. For the same flow capacity, the net weight is reduced by approximately 18%, lowering civil engineering costs and lifting difficulty.
Rapid Installation
With a pre-installed coupling base and quick-connect hose interfaces, the YW pump supports fixed, mobile, and outdoor direct-mount modes. A standard unit can go from positioning to commissioning readiness in just 2 hours.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | YW Series (e.g., YW-100-15-7.5) |
| Flow Rate | 100 m³/h (Rated) |
| Head | 15 m (Rated) |
| Motor Power | 7.5 kW |
| Discharge Diameter | 100 mm |
| Max Submersion Depth | 20 meters |
| Max Solid Content | ≤ 5% (Volume) |
| Max Particle Size | ≤ 50% of Pump Diameter |
| Medium pH | 4 – 10 (Cast Iron) |
| Medium Temperature | 0 – 40°C (High-temp optional) |
| Protection Class | IP68 (Fully Submersible) |
| Insulation Class | F / H (Optional) |
Installation Guide
Pre-Installation Checks
- Foundation: Verify load-bearing capacity is ≥ 1.5× the pump’s full-load weight.
- Clearance: Reserve ≥ 500mm space around the unit for maintenance.
- Medium: Confirm solid content ≤ 5% and particle size ≤ 50% of pump diameter.
- Submersion: Ensure depth ≤ 20m and ambient temp ≤ 40°C.
Installation Steps
- Coupling Alignment: Install the pump vertically on the coupling base. Ensure guide rail parallelism is ≤ 2mm/m so the pump seal mates naturally without side-load wear.
- Pipe Connections: Use flexible rubber joints or quick-connect hoses. Never use rigid piping directly, as it transfers stress to the pump. Install independent supports for inlet/outlet lines.
- Wiring: Route the float switch cable along the guide rail, keeping it away from moving parts. Separate signal cables from power lines to prevent interference.
- Pre-Start Check: Manually rotate the impeller to ensure no jamming. Jog the motor to verify rotation (clockwise from motor end). Measure insulation resistance (must be ≥ 50MΩ).
Commissioning
Prime the pump → Jog rotation check → Run no-load for 5 mins → Slowly open outlet valve to rated point → Record current, pressure, vibration, and temperature data.
Compliance & Certification
The YW submerged sewage pump is manufactured in strict compliance with GB/T 24674-2009 (Sewage Submersible Electric Pumps) and JB/T 5118-2010 standards. All units pass hydrostatic pressure tests (1.5× rated pressure), dynamic balancing (G6.3), and passage capability tests before delivery. The motors meet IEC 60034 standards with IP68 protection.
Frequently Asked Questions
Q1: How does the YW pump prevent clogging?
The YW pump uses a double-blade hydraulic impeller specifically designed to pass large solids and long fibers. It can handle solid contents up to 5% and particles up to 50% of the pump diameter without jamming.
Q2: Can this pump be used in deep wells?
The standard YW model supports submersion depths up to 20 meters. For deeper applications, please consult our engineering team for a customized high-pressure variant.
Q3: What is the advantage of the guide-rail coupling system?
The automatic coupling system allows the pump to be lifted and lowered along the guide rails for maintenance without anyone entering the sewage pit. This significantly improves safety and reduces maintenance time.
Q4: How often should the oil in the seal chamber be changed?
Under normal conditions, we recommend checking and replacing the oil in the oil chamber every 300–500 hours of operation. This ensures the mechanical seal remains well-lubricated and extends its lifespan.
Why Choose Chaodun Pump?
Chaodun Pump delivers YW submerged sewage pumps that are engineered for durability and efficiency in the harshest environments. With ISO 9001:2015 certification and CE compliance, our pumps are trusted in municipal, industrial, and agricultural projects worldwide. Contact us for a free consultation or a custom solution for your specific wastewater challenges.