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Flameproof Motor Overhaul & Service by EKG M&E Sdn Bhd

In the volatile industrial environments of Kuala Lumpur and Selangor, a flameproof motor (Ex d) is a precision safety device. Over time, bearings wear, insulation degrades, and critical flame paths can become corroded or obstructed. Unlike a standard motor service, a Flameproof Motor Overhaul is a regulated engineering process. If the internal tolerances are altered by even a fraction of a millimeter during repair, the motor’s ability to contain an internal explosion is compromised, turning a safety asset into a site hazard.

EKG M&E Sdn Bhd provides specialized overhaul and reclamation services in strict accordance with MS IEC 60079-19 (the Malaysian Standard for explosive atmosphere equipment repair).

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1. The Anatomy of an Ex d Overhaul

As an HVAC and Clean Air Specialist, we treat the motor as a pressure-vessel. Our overhaul process focuses on the "integrity of containment":

A. Flame Path Measurement & Restoration

The "Flame Path" is the precisely machined gap where the motor’s end shields meet the frame.

• The Service: We use calibrated feeler gauges and micrometers to verify these gaps. If a flame path is pitted or scratched, we perform Reclamation via selective metal spraying or precision machining to restore the gap to its original certified tolerance.

B. Certified Rewinding (Efficiency & Safety)

If the motor has burnt out, we perform a "Copy Winding" to the manufacturer's original specifications.

• The Service: We utilize Class H Insulation and high-grade resins. Crucially, we ensure the winding temperature remains within the motor's Temperature Class (T-Rating) to prevent the external casing from reaching the auto-ignition temperature of gases in your plant.

C. Mechanical Component Reclamation

We restore worn bearing housings (end shields) and shaft journals.

• The Service: Instead of discarding expensive Ex-rated castings, we use Laser Alignment and metal stitching or plating to bring mechanical parts back to "As-New" concentricity, preventing shaft runout that could damage flameproof seals.

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2. Critical Testing & Compliance

Every overhauled flameproof motor must undergo rigorous "Ex" verification before being returned to service:

Test / Inspection	Purpose	EKG M&E Implementation
Flame Path Audit	Confirm explosion containment.	Documented Gap vs. Certification Sheet.
Insulation Resistance	Verify winding integrity.	5000V Megger Testing & Polarization Index.
Vibration Analysis	Prevent mechanical friction/sparks.	Full FFT Spectrum Analysis & Balancing.
Hydrostatic / Pressure	Ensure structural integrity.	Case overpressure testing (if required).

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3. VFD Synchronization for Ex Motors

If your flameproof motor is driven by a Variable Frequency Drive (VFD), the overhaul must account for harmonic stress:

• dV/dt Protection: We ensure the new windings are "Inverter Rated" to withstand the voltage spikes common in VSD systems.

• T-Class Verification: We verify the internal thermistors are calibrated. When a VSD slows a motor down, its internal fan loses cooling capacity; the thermistors ensure the motor trips before it exceeds its safe temperature limit.

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4. JKKP (DOSH) and Audit Traceability

In Malaysia, the Department of Occupational Safety and Health (DOSH/JKKP) requires that all repairs to hazardous area equipment be traceable.

• The Service: We provide a comprehensive Overhaul Report detailing all measurements taken (Before/After), the materials used, and the final test results. This report is essential for your annual site safety audit and insurance compliance.

• The "R" Mark: Repaired equipment is marked with the "R" symbol on a new repair nameplate, identifying the service facility and the year of repair as per IEC 60079-19.

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Why Choose EKG M&E Sdn Bhd?

• Turnkey MEP Capability: We handle the entire lifecycle—from onsite removal and Laser Alignment to the internal mechanical overhaul and final re-installation in your KL facility.

• Certified Competency: Our technicians are trained in "Ex" repair methodologies, ensuring that your motor maintains its original certification (ATEX/IECEx/SIRIM).

• Predictive Support: We don't just fix what's broken; we perform a Root Cause Analysis on bearing failures and winding burns to help you prevent future downtime.