Valve maintenance & calibration solutions

Advanced, end-to-end valve maintenance, repair, calibration, and integrity solutions for the oil & gas, power plant and process industries. Full lifecycle support for all valve types — backed by an API-certified workshop, OEM partnerships, and highly skilled technical manpower.

 
API certified workshop
EFCO Maschinenbau TOT
PSV online testing
Cryogenic capability
Offshore & onshore

Overview

Beyond routine valve servicing — full lifecycle support

CMSL's valve capability goes far beyond routine servicing. We deliver full lifecycle support for all types of valves across liquid, gas, air, steam, and hydrocarbon services — backed by highly skilled technical manpower, OEM partnerships, and a fully equipped Port Harcourt workshop. Every valve we service is restored to safe, reliable, and fully compliant operating conditions in line with API standards, OEM specifications, and statutory requirements.

What we deliver

Our valve maintenance & calibration services

Eight specialised services covering the full valve lifecycle — from workshop recertification and in-situ testing to cryogenic services and predictive maintenance planning.

No shutdown required

In-country PSV online & in-situ testing

We provide certified in-country online testing of pressure safety valves (PSVs) and in-situ verification using the LEGA TEST machine — enabling validation of valve performance and set pressure while the process remains operational. This significantly reduces operational downtime and eliminates the need for full system shutdowns where safety, access, and operating conditions permit.

Specialist capability

Cryogenic valve services & low-temperature applications

CMSL provides specialised maintenance, repair, and testing for cryogenic valves operating under extreme low-temperature conditions — critical in LNG, gas processing, and other low-temperature process systems. Our capability includes inspection, disassembly, precision machining, seat repair, reconditioning, and recertification of cryogenic-rated valves. We apply controlled handling procedures, appropriate sealing materials, and OEM-aligned techniques to preserve valve integrity in sub-zero environments.

Workshop

Workshop valve overhaul, repair & recertification

Full valve overhaul at our dedicated facility — disassembly, cleaning, machining, part replacement, reassembly, pressure testing, and final certification under controlled QA/QC conditions.

In-situ

In-situ valve seat grinding & on-location overhaul

Mobile teams perform on-site valve seat grinding, lapping, testing, and general overhaul for valves that cannot be removed from service — ensuring reliability while maintaining plant availability.

Multi-site

High technical manpower & multi-team deployment

CMSL deploys multiple specialized valve teams simultaneously across various client locations — onshore and offshore — ensuring fast turnaround and consistent quality across large-scale campaigns.

Predictive

Predictive valve management & maintenance planning

Structured valve management strategies for predictive maintenance, failure prevention, and proactive planning — including condition-based recommendations, maintenance scheduling, and lifecycle optimization to reduce unplanned shutdowns.

See our valve maintenance projects

PSV recertification campaigns, plant-wide valve overhauls, offshore valve maintenance — explore our full track record.

Explore project portfolio

Why choose us

Why choose CMSL for valve maintenance

Complete valve capability

All types, all makes, all models — PSVs, PRVs, control valves, isolation valves, cryogenic valves, and actuated systems.

API-compliant workshop

Port Harcourt workshop with full traceability and certification — all repairs executed to API standards and OEM specifications.

EFCO Maschinenbau TOT

Backed by EFCO Maschinenbau TOT machining and repair capability — advanced equipment for precision valve servicing.

Multi-team deployment

Multiple specialised valve teams deployed simultaneously across large-scale campaigns — onshore and offshore across Nigeria.

In-country PSV testing

Online and in-situ PSV testing without full system shutdown — significantly reducing operational downtime and cost.

Predictive maintenance focus

Strong focus on valve lifecycle reliability — condition-based recommendations and maintenance scheduling to prevent failures.

Offshore & onshore capability

Field service support across Nigeria's onshore facilities, offshore platforms, and FPSOs — including turnaround campaigns.

Valve consultancy

Technical advisory services with foreign expatriate partners — condition assessments, failure investigations, and integrity management programmes.

Frequently Asked Questions

1What international standards do you test and certify valves to?
Our valve testing, repair, and recertification activities are performed in accordance with applicable international standards and OEM requirements. Depending on valve type and service application, this may include standards such as API 527 for pressure relief valve seat tightness testing, API 598 for valve inspection and testing, ASME requirements, API 521, API 6D and relevant manufacturer specifications. All testing is carried out using calibrated equipment and qualified procedures to ensure compliance and traceability.
2What is the typical turnaround time for workshop repair and recertification?
Turnaround time depends on valve type, size, condition, and spare parts availability. For standard pressure safety valves and common isolation valves, inspection, repair, testing, and recertification can often be completed within a few days of receipt. Larger, specialized, or heavily damaged valves may require additional time for machining, component replacement, or OEM support. Typically, 14-30 days, depending on the scope of the job.
3Can you provide in-situ testing for valves on live offshore platforms?
Yes. CMSL provides field service support both onshore and offshore and has the capability to perform valve testing at client locations. The company specifically states that pressure relief devices can be tested in-situ using the LEGA TEST machine while the process remains operational, where safety, access, and operating conditions permit. CMSL also maintains mobile workshop capabilities for offshore and onshore valve recertification campaigns.
4Do you maintain a stock of common spare parts and seats, or is there a lead time?
CMSL maintains support capability for a broad range of valve types and OEM equipment. Common consumables and frequently required replacement components are typically available through established supply chains; however, availability depends on valve make, model, and service requirements. Specialized trims, seats, springs, and OEM-specific components may require procurement lead time. For urgent requirements, our team works closely with approved suppliers and OEM partners to minimize delays and return equipment to service as quickly as possible. We provide our clients with the estimated delivery schedule as soon as the parts requirement is identified and approved.
5What documentation do clients receive after recertification?
Upon completion of repair and recertification activities, clients receive a comprehensive documentation package that may include: Valve test certificates Calibration certificates  QA/QC documentation report  Inspection  reports NDT reports Repair and maintenance reports  Data sheets  This documentation provides a complete audit trail and supports regulatory and asset integrity requirements.
6Can you repair valves that were originally supplied by another manufacturer?
Yes. Our technicians are trained to inspect, repair, and test valves from a wide range of OEMs, subject to the availability of technical data and replacement components.
7Do you provide offshore valve maintenance campaigns during shutdowns and turnarounds?
Yes. Our teams support planned shutdowns, turnarounds, brownfield projects, and routine maintenance campaigns across onshore facilities, offshore platforms, and FPSOs.
8Do you offer valve consultation services?
Yes. CMSL provides valve consultancy and technical advisory support in line with industry standards and in partnership with foreign expatriates to help clients improve asset reliability, safety, and regulatory compliance. Our specialists can assist with valve condition assessments, maintenance strategy development, valve selection and specification reviews, failure investigations, integrity management programs, shutdown planning, and recommendations for repair, replacement, or upgrade solutions.

Ready to schedule valve maintenance?

Whether it's a single valve recertification or a full plant-wide PSV programme — our technicians are ready

Talk to our valve specialists about your maintenance requirements, turnaround schedule, or PSV testing programme. We respond within 24 hours.

Request a quote