Valve and Actuator Services for Power and Industrial Plants

Testing, repair, machining, and on-site training to support safe, reliable plant operation

Talk to an Expert About Your Valve and Actuator Needs

Valve and actuator performance is critical to safe, reliable power and industrial plant operation — especially during outages, shutdowns, turnarounds, and critical maintenance windows. Day & Zimmermann delivers a comprehensive portfolio of valve and actuator services that support reliability across the full equipment lifecycle. Our integrated approach combines testing, repair, refurbishment, machining, and workforce training to help plant owners and operators reduce risk, improve readiness, and execute maintenance and project work with confidence.

As a trusted partner for valve services, our capabilities span a broad range of on-site and shop-based solutions.

Valve Repair and Repacking

Restore valve performance and extend service life through comprehensive on-site and shop-based repair services. Our personnel, equipment, and mobile facilities support valve disassembly, inspection, in-line and off-line machining, repacking, live loading, and reassembly across a wide range of valve types and applications.

AOV/MOV Repair and Diagnostic Testing

Identify issues, validate performance, and reduce risk with experienced AOV and MOV repair and diagnostic testing services. Our technicians are trained and experienced in major diagnostic testing procedures and equipment, supported by D&Z’s Mobile Actuator Repair Centers (MARC) for actuator disassembly, inspection, refurbishment, and reinstallation.

Mobile and In-Place Machining

Minimize downtime and avoid unnecessary valve removal with precision mobile and in-place machining services. Our Mobile Machine Repair Centers (MMRC) are equipped with a comprehensive assortment of machine tools to support a complete team of valve specialists directly at your facility.

On-Site Valve Training and Qualification

Build technician capability and validate proficiency through on-site valve and actuator training delivered via our Mobile Valve Training Center. Our programs help accelerate technician qualification, reduce training costs, and align instruction with plant-specific systems, procedures, and standards.

Mobile Valve Training Center

Accelerate workforce readiness with on-site valve and actuator training delivered through Day & Zimmermann’s Mobile Valve Training Center. We bring hands-on instruction and qualification assessments directly to your facility, helping reduce travel costs, minimize downtime, and support faster technician qualification.

On-Site Valve Training and Qualification

D&Z’s Mobile Valve Training Center supports on-site valve and actuator training programs designed to align with your plant’s standards, systems, and operating procedures. By bringing the classroom to your site, D&Z enables skill development while integrating seamlessly with maintenance and outage schedules.

By delivering hands-on training at your site, D&Z helps improve knowledge retention among trainees, standardize qualification practices, and reduce the logistical challenges associated with off-site instruction.

Why Choose On-Site Training with D&Z

Hands-on valve and actuator training: Instructor-led learning using multiple valve and actuator types to support real-world maintenance and troubleshooting scenarios.
Reduced downtime and training cost: On-site delivery eliminates off-site travel, classroom expenses, and schedule disruption.
Plant-aligned instruction: Training tailored to your equipment, procedures, and qualification requirements.
Focused class sizes: Smaller groups improve engagement, knowledge retention, and technician proficiency.

Core Training Focus Areas

Training programs are designed to support a wide range of valve and actuator technician qualification and ongoing proficiency needs, including:

Valve fundamentals, components, and operating principles
Actuator diagnostics and troubleshooting for AOV and MOV applications in power and industrial plants
Performance testing using functional controls and MCC simulation
Computer-based assessments and industry-aligned evaluations, including EPRI-aligned testing via NANTeL where applicable
Initial qualification and refresher training aligned to outage or maintenance schedules

How It Works

Our on-site training program is designed to minimize disruption while maximizing relevance and results:

Share your preferred training schedule, location, and number of participants.
We align the curriculum with your site standards, equipment, and training objectives.
Our instructors deliver on-site training, hands-on assessments, and completion documentation.

Ready to strengthen valve and actuator performance across your plant?

Contact our team to discuss testing, repair, machining, training, and qualification services and how Day & Zimmermann can support your maintenance, outage, shutdown, turnaround, and project needs.