Our Services

We deliver reliable equipment rentals and expert maintenance services across North Dakota. From mobile rig heaters to pressure relief valve testing, we ensure your operations stay efficient and resilient, no matter the challenge. Trust our Williston-based team for top-notch solutions tailored to your needs.

Diamond W Professional Valve Maintenance

Dependable Service

At Diamond W LLC, we are committed to providing top-tier solutions to meet the diverse needs of industries across North Dakota. Based in Williston, ND, our expert team specializes in delivering reliable and efficient equipment rentals and maintenance services. From mobile rig heaters & Coolers to advanced pressure relief valve testing and preventative maintenance, we ensure your operations run smoothly, even in the harshest conditions.

Trust Diamond W LLC for exceptional service and industry-leading expertise.

Valve Testing and Maintenance

Maintain the safety and efficiency of your operations with Diamond W LLC’s expert valve testing and maintenance services. Our team specializes in mobile pressure relief valve testing and gate valve preventative maintenance, ensuring your equipment meets industry standards and operates flawlessly. From on-site repairs to in-depth breakdown analysis, we provide the expertise and support needed to keep your systems running smoothly. Trust Diamond W LLC for comprehensive valve care that enhances performance and reliability.

Diamond W Pressure relief valve testing and recertification services

Pressure Relief Valve Testing and Recertification

Keep your operations safe and compliant with our mobile field testing and recertification services for gas and liquid PRV valves.

We provide on-site repair or replacement, along with in-facility testing on our national board-approved bench for precision and reliability.

Diamond W Professional Valve Maintenance

Gate Valve Preventative Maintenance

Maintain the integrity and functionality of your gate valves with our comprehensive preventative maintenance services.

Our team offers greasing, breakdown analysis, and the capability to replace Wellhead Casing Gate Valves, ensuring your operations remain efficient and trouble-free.

Keep Your Operations Running Smoothly

Your operations deserve the best—let Diamond W be your go-to partner for all your equipment and maintenance and certification solutions.

Heating and Cooling Solutions

Ensure your operations run smoothly year-round with Diamond W LLC’s comprehensive heating and cooling solutions. Whether you need mobile rig heaters to combat freezing temperatures or high-performance fluid and gas coolers for efficient temperature regulation, we have you covered. Our reliable equipment rentals, paired with 24-hour maintenance and support, guarantee optimal performance in any environment. Trust Diamond W LLC to keep your facilities safe and operational, no matter the season.

Diamond W | Mobile Rig Heaters

Mobile Rig Heaters

Ensure your facility remains operational during the harsh winter months with our mobile rig heaters.

Available for rent, our heaters prevent your equipment from freezing, and our 24-hour maintenance and refueling services guarantee uninterrupted performance.

Diamond W Fluid and Gas Cooling for Oil Rigs and wells

Fluid & Gas Coolers

Our range of fluid and gas rental coolers, available in configurations from 2, 6, 8, 10, and 12 fan-coolers, are designed to meet all your cooling needs.

We offer seamless installation and 24-hour on-call maintenance to ensure optimal performance in any environment.