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Repair & Services

Manuex Company Nigeria Limited · Masoneilan Authorized Repair Centre · Onne, Rivers State

Minimize plant downtime with certified valve services — in our shop, or in-situ.

Baker Hughes OEM-spec maintenance, in-situ PCV repair, and EVT calibration & testing for PSVs, delivered from our fully commissioned MARC workshop and dispatched to your line anywhere in Nigeria.

LOC

Strategic Onne Hub

Based in Rivers State, our workshop gives oil, gas, and power plants across the region fast, reliable turnaround.

QMS

ISO 9001 Quality System

Every job runs inside an ISO 9001 quality management framework, so repairs stay traceable, repeatable, and safe.

OEM

Baker Hughes Channel Partner

Manuex Company Nigeria Limited is audited and commissioned directly by the OEM, so every repair meets genuine factory-spec standards.

23+
Years of Combined OEM & Field Experience
Who We Are

Built for the standard oil, gas, and power operators demand.

Manuex Company Nigeria Limited operates the region's Masoneilan Authorized Repair Centre from our fully commissioned Onne workshop. We exist to keep control and safety valves running to factory specification, whether that means a full teardown on our bench or a field team dispatched to your line.

  • OEM-audited technicians working to genuine Baker Hughes rebuild standards.
  • ISO 9001 quality management applied to every intake, repair, and certification.
  • Multi-brand capability, so mixed valve fleets are serviced under one contract.
  • Rapid mobilization from Onne to plants across Nigeria's oil & gas corridor.
Core Service Offerings

Every phase of maintenance, under one quality control system.

Multi-brand fleets, handled in our workshop or directly on your line — same standard, either way.

SVC-01 — WORKSHOP

Diagnostic & Workshop Maintenance

Complete inspection, teardown, cleaning, and rebuild of control and safety valves at our MARC facility.

SVC-02 — IN-SITU

In-Situ PCV Repair

Troubleshooting, component replacement, and repair of pressure control valves directly on the line — no piping teardown required.

SVC-03 — EVT / PSV

EVT Calibration & PSV Testing

Electronic valve testing for pressure safety valves, giving you precise calibration data under live operating conditions.

SVC-04 — FINISH

Precision Calibration & Painting

Fine-tuning of digital valve positioners, including Masoneilan SVI units, finished with industrial-grade anti-corrosive coating.

Supported Brands & Models

Baker Hughes specialists. Universal-fleet capable.

Our tooling and technicians cover flagship Baker Hughes lines plus every major third-party manufacturer in your fleet.

Masoneilan

  • Rotary valves
  • Reciprocating valves
  • Level Transmitter
  • Regulators
  • General Instrumentation

Other Major Brands

  • Full maintenance & rebuild
  • Calibration & EVT testing
  • Multi-brand fleet servicing
Why Choose Us

Steel and pressure equipment reward precision, not shortcuts. Our teams are trained directly on Baker Hughes rebuild procedures and carry that discipline into every workshop job and every field mobilization.

95%
First-Time Fix RateWorkshop & in-situ combined
88%
On-Time MobilizationField team dispatch, Rivers State
60%
Repeat Client ContractsStanding maintenance agreements
Asset Lifecycle

Five steps, start to certified finish.

A transparent workflow for every valve that comes through our shop, or every field team we mobilize.

01

Intake / Mobilization

Secure logging at our Onne hub, or immediate deployment of our field team for in-situ and EVT work.

02

Decontamination & Inspection

Safe cleaning and thorough analysis to identify wear or calibration drift.

03

Reporting & Approval

Precision diagnostics and an upfront repair recommendation before any work begins.

04

OEM Rebuild & Calibration

Assembly with genuine parts, or live instrument tuning with EVT systems for safety valves.

05

Testing & Certification

Strict pressure testing and painting, closed out with formal test certificates to international standards.

Track Record

The numbers behind Manuex.

500+
Valves Serviced
23+
Years Combined Experience
100+
Satisfied Clients
7+
Certified Technicians
10+
Industries Served
Testimonials

What plant operators say about Manuex.

Direct feedback from the maintenance and reliability teams we work alongside.

Manuex turned around our PSV bank faster than we expected, and the EVT certificates gave our auditors exactly what they needed.

Reliability ManagerOnshore Gas Processing Facility

Their in-situ team repaired a critical PCV without shutting the line down. That alone justified the contract.

Maintenance SuperintendentPetrochemical Plant, Rivers State

Genuine OEM parts, proper documentation, and technicians who clearly know Masoneilan equipment inside out.

Instrumentation EngineerPower Generation Facility
Why It Matters

Uncalibrated PSVs are a compliance risk, not just a maintenance one.

A pressure safety valve that drifts out of set point can fail an audit or fail the plant. Our EVT program exists to catch that drift before it becomes either.

  • Scheduled EVT calibration keeps set points inside regulatory tolerance.
  • Genuine OEM components hold spec longer than aftermarket substitutes.
  • In-situ repair avoids the downtime cost of a full valve pull.
Learn About EVT Testing
From The Workshop

Field Notes

Manuex TeamJune 2026

Signs your PCV needs an in-situ inspection

Three field indicators our technicians check before recommending a full teardown.

Manuex TeamMay 2026

What EVT calibration data actually proves to your auditor

Reading a set-point deviation report the way a compliance reviewer will.