Industrial Valve & Mechanical Services Your Trusted Partner Across North Africa
Precision testing, certified repair, and field-ready expertise for safety valves, control valves, instrumentation, and complete plant maintenance — from Sfax to Tripoli and beyond.
Our Services
What We Do
Full-spectrum industrial maintenance, testing, and engineering services — delivered on-site or in our certified workshops.
Safety Valve Testing, Repair & Certification
Full PSV/PRV lifecycle: pop-test, overhaul, re-certification, and LESER OEM repair as the only LARC in Tunisia.
Learn MoreControl Valve Repair & Diagnostics
Valve positioner calibration, trim replacement, actuator overhaul, and partial stroke testing to restore full control loop performance.
Learn MoreField Services: Repair, Machining & In-Situ Testing
Two mobile workshops bring our certified repair and testing capabilities directly to your plant — minimising downtime and eliminating transport risk.
Learn MoreNon-Destructive Testing (NDT)
UT, MT, PT, RT, VT and PAUT inspection services for welds, pressure vessels, piping, and structural components.
Learn MoreInstrumentation & Calibration
Traceable calibration of pressure, temperature, flow, and level instruments — on-site or in our accredited calibration lab.
Learn MoreShutdown Management & Commissioning
Full turnaround planning, scope execution, and commissioning support — on time and within budget.
Learn MoreComplete Capability
All Our Service Lines
Why M Expert Engineering
The Trusted Choice for Critical Industrial Services
From the smallest PSV pop-test to a full plant turnaround, clients across Tunisia, Libya, and Algeria choose us because we deliver precision work — on time, fully documented, and to international standards.
Only LESER LARC in Tunisia
OEM-authorised safety valve repair — not just generic overhaul.
Two Mobile Workshops
We come to your plant. Full testing capability, zero transport risk.
Certified to International Standards
ASME, API, ISO 9001 / 45001 / 14001 — every job documented for your records.
Single-Source Multi-Discipline
Valves, NDT, instrumentation, welding, machining — one call, one mobilisation.
North Africa Coverage
Based in Sfax, active in Libya and Algeria — responsive where others aren't.
Sfax Workshop — Certified Test Bench
PSV testing from ½" to 30" · Up to 4,000 bar · API 527 certified
Industries We Serve
Built for the Most Demanding Sectors
Oil & Gas
Petrochemical
Refining
Power Generation
Water Treatment
Pharmaceutical
Mobile Capability
Two Fully-Equipped Mobile Workshops
Our mobile workshops are self-contained units capable of full PSV certification, valve repair, precision machining, and NDT inspection — deployed wherever you need us across North Africa.
- Full PSV pop-testing and certification on-site
- Portable machining and lapping equipments
- Calibration equipment for all instruments
- NDT equipment: UT, MT, PT
- 24/7 emergency call-out available
Trusted By
Our Clients
OEM Relationships
Partners & Suppliers
Ready to Talk to an Engineer?
Request a quote, describe your challenge, or simply ask a technical question. Our team responds within one business day.