Explosion-Proof ATEX Certified SS316L Mechanical Bar Screen for Hazardous Wastewater Screening
Explosion-Proof Mechanical Bar Screen ATEX Certified Zone 1 Zone 2 SS316L Hazardous Area Wastewater Screening Equipment The Explosion-Proof Mechanical Bar Screen is a fully ATEX-certified wastewater screening solution purpose-engineered for operation in hazardous areas classified as Zone 1 (Gas ...
Explosion-Proof Mechanical Bar Screen ATEX Certified
,SS316L Wastewater Screening Equipment
,Hazardous Area Mechanical Bar Screen
- Full ATEX Certification: EU-Type Examination Certificate covering the complete bar screen assembly for Zone 1 (II 2G Ex db IIB T4 Gb) and Zone 2 (II 3G Ex ec IIB T4 Gc) hazardous areas, with optional IECEx certification for international projects.
- Explosion-Proof Drive System: Flameproof (Ex d) motor with ATEX-certified gear reducer, supplied through Ex e increased-safety terminal box with certified double-compression cable glands, rated for continuous duty in gas group IIB environments.
- Spark-Resistant Mechanical Design: Bronze alloy guide shoes, CuBe scraper tips, and self-lubricating PTFE-impregnated chain bushings eliminate all potential sources of mechanically generated sparks during normal and foreseeable abnormal operation.
- Intrinsically Safe Instrumentation: All proximity sensors, limit switches, and level transmitters are ATEX-certified intrinsically safe (Ex ia) devices connected through galvanic isolators in the safe-area control panel.
- Full SS316L Metallurgy: Complete construction in SS316L including frame, bars, fasteners, and weld filler metal provides resistance to hydrogen sulfide stress cracking, chloride pitting, and acidic corrosion common in refinery and chemical plant wastewater.
- Remote Control Panel Placement: The PLC control cabinet is designed for installation in the safe area (control room or non-classified zone) at distances up to 500 meters, with all field wiring through armored Ex-approved cable.
| Parameter | Specification |
|---|---|
| ATEX Classification | Zone 1: II 2G Ex db IIB T4 Gb / Zone 2: II 3G Ex ec IIB T4 Gc |
| IECEx Availability | Optional IECEx certification for non-EU projects |
| Bar Spacing | 5 mm – 50 mm, selectable per screening target |
| Channel Width | 400 mm – 2000 mm customizable |
| Channel Depth | 600 mm – 6000 mm customized to site |
| Material | SS316L (frame, bars, fasteners, all wetted components) |
| Motor Type | Flameproof Ex d IIB T4, IP66, Class H insulation |
| Motor Power | 0.75 kW – 7.5 kW depending on screen size |
| Instrumentation | Ex ia intrinsically safe sensors with galvanic isolators |
| Installation Angle | 60° – 85° (standard 75°) |
| Max Control Distance | 500 m (safe-area control panel to field equipment) |
The Explosion-Proof Bar Screen is essential infrastructure for oil refinery API separator inlet channels where the wastewater surface may carry a flammable hydrocarbon layer, requiring all electrical equipment within the classified zone to be explosion-proof.
Offshore production platforms use this screen in produced water treatment systems where dissolved gas carryover creates a Zone 1 environment on the treatment deck.
Petrochemical plants producing ethylene, propylene, aromatics, and solvents require ATEX-certified screening in their process water and stormwater runoff treatment systems.
Tank farm and fuel storage terminal drainage treatment facilities depend on explosion-proof screens to safely handle rainwater runoff that may contain floating product.
Chemical manufacturing facilities handling volatile organic compounds, alcohols, and ketones use this equipment in their effluent pretreatment channels where vapor concentrations can reach the lower explosive limit.
Each Explosion-Proof Bar Screen undergoes a rigorous factory acceptance test that includes complete functional testing of all ATEX-certified components, insulation resistance testing of the Ex d motor, loop checking of all intrinsically safe circuits with the specified galvanic isolators, and a full-scale wet test to verify mechanical operation.
The quality documentation package includes the EU-Type Examination Certificate, individual component ATEX certificates, material certificates for SS316L with PMI test reports, NDT reports for structural welds, motor test certificates, and intrinsically safe system descriptive documentation as required by IEC 60079-25.
All equipment is packed in reinforced export crates with each ATEX-certified component individually wrapped in anti-static protective material. The standard warranty is 18 months from shipment. Factory-authorized hazardous area commissioning engineers are strongly recommended for on-site installation supervision and ATEX compliance verification.
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