Low-Speed Submersible Thruster with Polyurethane Blades for Oxidation Ditch and

Product Specification

Low-Speed Submersible Thruster with Polyurethane Blades for Oxidation Ditch and Sewage Treatment

Brief Description

A QJB low-speed submersible thruster is fitted with a large curved two-blade polyurethane impeller. Operating at low rotational speed with high thrust, it generates continuous large-volume water circulation within long oxidation ditches and large biochemical tanks, uniformly suspending activated sludge and effectively preventing sludge deposition. It serves as the core circulation equipment for aerobic and anoxic tanks in municipal wastewater treatment plants.

Product Overview

This low-speed submersible thruster adopts an integrated cast iron submersible motor paired with a planetary reduction gearbox, which delivers high torque output at low rotational speeds. The oversized polyurethane propeller features lightweight construction, high toughness, excellent wear resistance and anti-corrosion properties.

Compared with small submersible mixers, it delivers a longer pushing distance and covers a larger flow area, making it ideal for long-strip oxidation ditches and large sewage tanks. The fully submersible IP68 sealed structure enables 24-hour uninterrupted underwater operation. The power range spans 1.5kW ~ 7.5kW, with multiple optional impeller diameters available.

Working Principle

The hermetically sealed submersible motor drives the planetary gearbox to reduce speed and amplify torque, thereby slowly rotating the large polyurethane blades. A wide-range pushing flow is generated in the water body to continuously circulate the entire tank volume, maintaining activated sludge in permanent suspension. Combined with the aeration system, it greatly improves sewage purification efficiency.

Product Parameters

Key Design & Performance Features

1. Large Curved Polyurethane Blades

High toughness, abrasion resistance, anti-fouling & anti-winding performance against fibrous impurities, extended service life.

2. Built-in Planetary Reducer

Generates high output torque at ultra-low speed, long pushing distance and low power consumption.

3. IP68 Waterproof Submersible Motor (Class F Insulation)

Internal anti-condensation structure ensures stable long-term underwater operation.

4. Dual Tungsten Carbide Mechanical Seal

Double-sided mechanical sealing effectively blocks sewage intrusion and drastically reduces leakage failure rates.

5. Heavy-Duty Cast Iron Motor Housing

Strong impact resistance, suitable for harsh wastewater working conditions.

6. Complete Installation Accessories

Equipped with lifting lugs, guide rails and hanging brackets for convenient underwater installation and maintenance.

Applications

Primarily used for oxidation ditches, large anoxic tanks, anaerobic tanks and aerobic tanks in municipal wastewater treatment projects. It is also widely applied in aquaculture water circulation and large-volume circulating stirring for industrial wastewater.

Operating conditions:

1. Maximum medium temperature ≤ 40℃

2. Applicable pH range: 5 ~ 9

3. Liquid density ≤ 1150 kg/m³

4. Maximum submergence depth: ≤ 20m

Company Profile

WESUS is a leading manufacturer and total solution provider for advanced sewage and sludge treatment systems. Founded in Yixing, China in 2013, we offer reliable, cost-effective equipment and engineering services to global clients. Certified with ISO 9001, ISO 14001 and ISO 45001, we boast strong in-house R&D and manufacturing capabilities supported by a large production base, a professional technical team, patents and university cooperation. Our comprehensive product range includes screening, filtration, sludge dewatering, mixing, aeration and customized solutions. With end-to-end services from design to after-sales support and proven global project experience, we have earned wide recognition including national high-tech enterprise and 5-star after-sales certifications. Adhering to the philosophy of real innovation, excellence and win-win cooperation, WESUS is committed to providing smart, sustainable water treatment solutions for municipal and industrial clients worldwide.

FAQ

Q1: Are you a direct manufacturer? What certifications do you hold?
A: We are a direct manufacturer with our own production facilities and R&D team. We maintain full control over quality, cost, and delivery, and hold certifications including ISO 9001/14001 for our core products.

Q2: What types of collaboration models do you offer?
A: We provide flexible solutions:
- Equipment Supply: Standalone or packaged systems.
- Turnkey Solutions (EPC): Design, procurement, construction, and commissioning.
- Technical Cooperation: Process upgrades, operational maintenance support, and technical consulting.

Q3: How is after-sales service and support ensured?
A: We provide full lifecycle support:
- Warranty: 12–24 months on core equipment.
- Response: 7x24 remote support with fast on-site assistance when needed.
- Spare Parts: Genuine parts are stocked for long-term supply security.
- Maintenance: Annual Maintenance Contracts (AMC) are available to ensure long-term system efficiency.

Q4: What is your typical project execution process?
A: Our standardized workflow ensures efficiency and transparency:
1. Requirement Analysis → 2. Proposal & Quotation → 3. Design Finalization → 4. Production & Factory Testing → 5. Shipping & Installation → 6. Commissioning & Training → 7. After-sales Service.
Customer involvement is encouraged at key milestones.

Q5: Can you provide references or case studies?
A: We have extensive global project experience across municipal and various industrial sectors. We can provide detailed, anonymized case studies and client references upon request.

Q6: What are your payment terms and delivery lead times?
A: - Payment: We accept T/T and L/C, with standard industry progress payment terms.
- Lead Time: Standard equipment: 4–8 weeks. Large custom projects: 12–20 weeks.
A clear production schedule is provided upon contract signing.

Q7: How do you serve international clients?
A: We are experienced in international projects, arranging complete logistics (FOB, CIF, DDP, etc.) and providing full customs documentation. Our designs pre-consider compliance requirements in target markets.

Q8: Can you upgrade or retrofit existing systems?
A: Yes. We specialize in evaluating existing facilities and providing customized retrofit and expansion solutions to enhance performance and capacity with minimal investment and downtime.

Q9: How can we start a consultation?

A: Please contact our Sales Engineering team. To facilitate an efficient discussion, please have your treatment requirements, water

quality data, and site information ready. We will provide a preliminary proposal and professional advice.