

What We Do
For over 90 years, RL Stone has been the leader in steam specialties, process control instrumentation, and HVAC products and services to New England and Upstate New York.
Our experienced and highly trained technical professionals can specify, implement, service and maintain your equipment. We are part of one of the largest process flow control distributors in the nation with access to the top brands of the energy-efficient components you need.
Our application engineers have built a reputation for delivering expert process steam and instrumentation solutions for hospitals, universities, municipalities. In addition, we have built long-term partnerships with contractors, OEMs and companies in the food and beverage industry.
ENGINEERED SOLUTIONS FOR STEAM PROCESSES
Our experienced team is ready to help you select and implement process flow control solutions you can rely on. We can find you the right products for your system or determine if the products you are using are being used appropriately.
We offer a full range of engineered solutions, including instrumentation, process and control systems, HVAC and steam systems, hydronic systems, steam trap surveys, and pre-insulated underground piping. Our capabilities also cover automated valves, lined pipe and hoses, and hot water generation and control.




WE'RE YOUR STEAM SPECIALTIES EXPERTS.
We sell, service, maintain, and audit a wide range of steam specialty components, including control valves, pressure reduction steam stations, steam traps and strainers, condensate pumps, steam separators, humidifiers, steam turbines, and clean steam generators.
WE SPECIALIZE IN ALL THINGS HVAC
Our team can engineer a solution based on your specifications delivering improvements to your industrial HVAC system’s design and efficiency. Our applications experience covers:
- Air handlers
- Hot water heaters
- Pre-insulated underground piping
- Liquid and gas BTU and flow meters
- Expansion loops and isolators
- Building and booster pumps





