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Rotary Rake Screen – Rainwater Grit Chamber Pre-treatment Bar Screen
| Place of Origin | CHINA |
| Brand Name | WESUS |
| Certification | CE, UL |
| Model Number | Mechanical Bar Screen |
Rotary Rake Screen for rainwater treatment
,Mechanical Bar Screen grit chamber
,Pre-treatment Bar Screen with rake
Rotary Rake Screen – Rainwater Grit Chamber Pre-treatment Bar Screen
Brief Description
Rainwater bar screen is a pre-treatment trash interception equipment installed at the inlet of rainwater pumping stations, interception projects and storage tanks, mounted inside the rainwater channel.
Product Overview
It intercepts floating debris in rainwater such as branches, fallen leaves, plastic bags, weeds and domestic waste, preventing large pollutants from clogging pumps and pipelines, and ensuring the safe and stable operation of rainwater drainage systems. Rainwater features highly variable flow rates, heavy instantaneous pollutant load during rainstorms and intermittent operation. Therefore, rainwater bar screens are designed with priority on high flow capacity.
Working Principle
The motor drives the circular rotation of rake tooth chains. Rake teeth submerge into water to capture floating waste, lift pollutants upward to the top of the equipment. Waste falls into the slag hopper by gravity. The rake teeth rotate downward and re-enter the water for continuous automatic sludge removal. A cleaning brush is fitted at the top to remove sticky residues on rake teeth. It can be automatically controlled by water level difference: the screen starts cleaning when the water level difference before and after the screen reaches the set value. Timed control and local manual control are also available.
Product Parameters
|
Parameters |
Model |
SL-2500 |
SL-3000 |
SL-3500 |
SL-4000 |
SL-4500 |
SL-5000 |
|
Equipment Width B (mm) |
2500 |
3000 |
3500 |
4000 |
4500 |
5000 |
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Channel Width B1 (mm) |
B+100 |
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Effective Screen Width B2 (mm) |
B-140 |
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Overall Equipment Width B3 (mm) |
B+250 |
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Bar Spacing b (mm) |
40-150 |
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Installation Angle α (°) |
70-80 |
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Channel Depth H (mm) |
2000-6000 |
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Discharge Height H1 (mm) |
1000-1500 |
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Total Equipment Height H2 (mm) |
H+H1+1200 |
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Rake Travel Speed V(m/min) |
≈3 |
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Motor Power N (kW) |
1.1-2.2 |
2.2-3.0 |
3.0-4.0 |
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Rake Bucket Load Capacity (N/m) |
3000 |
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Civil Load |
P1(kN) |
20.0 |
35.0 |
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P2(kN) |
20.0 |
35.0 |
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ΔP(kN) |
2.0 |
3.0 |
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Water Flow Rate Table
|
Parameters |
SL-2500 |
SL-3000 |
SL-3500 |
SL-4000 |
SL-4500 |
SL-5000 |
|
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Water Depth Upstream of Screen H3 (m) |
3.0 |
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Flow Velocity through Screen V (m/s) |
1.0 |
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Bar Spacing b (mm)Water Flow Rate Q (m³/s) |
40 |
5.66 |
6.87 |
8.06 |
8.26 |
10.46 |
11.65 |
|
50 |
5.88 |
7.11 |
8.4 |
9.6 |
10.86 |
12.09 |
|
|
60 |
6 |
7.35 |
8.64 |
9.93 |
11.22 |
12.51 |
|
|
70 |
6.24 |
7.5 |
8.8 |
10.14 |
11.46 |
12.75 |
|
|
80 |
6.3 |
7.62 |
8.97 |
10.29 |
11.64 |
12.96 |
|
|
90 |
6.36 |
7.71 |
9.06 |
10.41 |
11.7 |
13.11 |
|
|
100 |
6.45 |
7.8 |
9.15 |
10.53 |
11.88 |
13.26 |
|
|
110 |
6.48 |
7.86 |
9.24 |
10.62 |
12 |
13.35 |
|
|
120 |
6.54 |
7.92 |
9.3 |
10.68 |
12.06 |
13.47 |
|
|
130 |
6.57 |
7.98 |
9.36 |
10.74 |
12.15 |
13.53 |
|
|
140 |
6.6 |
8.01 |
9.39 |
10.8 |
12.21 |
13.59 |
|
|
150 |
6.63 |
8.04 |
9.45 |
10.86 |
12.27 |
13.65 |
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Key Design & Performance Features
1.Large flow cross-section and low head loss, suitable for high rainwater flow during storms.
2.Automatic operation, unattended, adaptive to fluctuating rainwater flow.
3.Equipped with overload protection to withstand impact from large debris.
4.Mostly made of stainless steel, resistant to corrosion by rainwater and sediment.
Applications
Urban rainwater pumping stations, combined sewer intercepting wells, rainwater storage tanks, flood drainage pumping stations, initial rainwater treatment, inlet of box culverts and other rainwater projects.
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.
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