Advanced Mechanical Step Screen for Stormwater & Municipal Wastewater
The high-performance Mechanical Step Screen is an ideal choice for challenging solid-liquid separation tasks in municipal treatment plants and large-scale stormwater harvesting networks. Unlike static mesh panels that suffer from blinding, the step screen uses alternating moving and fixed stainless steel lamellae. This continuous mechanical cycle automatically cleans the grid slot face while building a temporary screenings mat (carpet effect) that naturally increases the actual filtration efficiency beyond the nominal gap size.
Key Technical Engineering Advantages
Traditional fine screens consume thousands of gallons of clean high-pressure water daily for backwashing. Our step screen relies entirely on physical lamellae displacement to shed captured solids, lowering total operational costs and simplifying pipeline hookups.
During extreme heavy rain events, open surface drainage channels carry heavy loads of organic waste, mud clots, and twigs. The continuous stepped elevating action acts like a heavy-duty conveyor, clearing massive volumes of trash out of the water channel rapidly.
Designed to be installed at an ergonomic 50° or 60° angle. It fits perfectly into shallow or deep concrete channels alike, requiring significantly less footprint than traditional rotary drum filters or rake screens.
Target Industrial and Infrastructure Markets
Our heavy-duty industrial step screens are meticulously optimized for demanding performance in a variety of sectors:
- Sustainable Urban Drainage Systems (SUDS): Safeguarding modern sponge-city soakaway modules, geographic detention basins, and downstream underground aquifers.
- Wastewater Plant Headworks: Exceptional fine screening down to 1-3mm gaps to screen out hair and micro-plastics prior to biological treatment.
- Flood Control Pumping Stations: Reliable pre-clearing of open-air river channels to prevent trash from fouling large axial-flow drainage pumps.
- Industrial Water Intake: Primary screening of surface raw water extracted from rivers or lakes for manufacturing cooling systems.
Technical Data & Channel Sizing Matrix
| Model Type | Channel Width (mm) | Standard Slot Gap (mm) | Max Flow Capacity (m³/h) | Drive Motor (kW) | Installation Angle |
|---|---|---|---|---|---|
| XSS-500 | 500 | 1.0 / 2.0 / 3.0 | 180 – 350 | 1.1 | 50° / 60° |
| XSS-800 | 800 | 2.0 / 3.0 / 6.0 | 400 – 820 | 1.5 | 50° / 60° |
| XSS-1000 | 1000 | 2.0 / 3.0 / 6.0 | 750 – 1400 | 2.2 | 50° / 60° |
| XSS-1500 | 1500 | 3.0 / 6.0 | 1200 – 2500 | 3.0 | 50° / 60° |
Global Project Export & Heavy Machinery Logistics
As an expert B2B manufacturing exporter, we deliver tailored industrial-grade shipping protocols and components compliant with global municipal procurement mandates:
- International Premium Components: Driven by premium NORD or SEW gearboxes and multi-voltage motors matching local grids (60Hz/50Hz).
- Structural Rigidity Packing: Bound within heavy-duty timber crating featuring internal mechanical load locks to eliminate shifting or alignment warping during sea voyage.
- B2B Turnkey Support: Full provision of structural anchor layouts, finite element flow analysis documents, and English O&M data manuals.
Frequently Asked Questions (FAQ)
A1: Step screens provide a completely unhindered straight-through hydraulic path, creating significantly lower initial head loss compared to enclosed drum drums. Furthermore, the step-action mechanism handles stringy items and large sudden trash dump inputs far better without jamming.
A2: As solids collect on the stepped structure, they form a thick layer of trapped debris. This debris mat acts as an additional ultra-fine filter layer itself, allowing a screen with a nominal 3mm gap to trap particles as small as 1mm before the moving plates shift to lift the mat away.
A3: Our equipment is engineered with a special localized bottom flushing profile or elevated step offset. This prevents heavy sand deposits from accumulating inside the bottom turn-around joint, protecting moving components from grit abrasion.
A4: Absolutely. The system is fully compatible with ultrasonic level differential sensors. It remains in standby when water flows cleanly, and triggers its self-cleaning mechanical cycle only when a debris build-up causes an upstream/downstream level variation, drastically saving energy.
Get Custom Step Screen Technical Layouts & Factory Estimates
Are you an engineering consultant or plant operator drafting specs for a civil wastewater headworks or an international urban stormwater storage tank? Send us your concrete channel width, channel depth, maximum flow rates, and desired slot rating. Our senior design team will deliver custom-tailored CAD footprints and an optimized direct-factory pricing quote within 24 hours.
Contact our B2B export engineering department today to receive an itemized wholesale pricing catalog, detailed engineering blueprints, and a complete physical sample box delivered directly to your corporate headquarters!
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