While we cannot verify content or make recommendations regarding any site other than our own, the following are some sites we know of that are helpful to us in one way or another during daily operations. Note that when you visit a site that it will open in another browser window. You will not be able to use the back button to return here, but simply closing the second window will enable you to come back. This will mean that regardless of how many links you follow from the sites you can always easily return here.


Advance Valve is an ASME code-certified assembler for a broad range of quality safety relief valves and offers a complete line of safety relief valves and accessories.

ASCO Valve, the World's Leading Manufacturer of Solenoid Valves. ASCO Valves are engineered to control the flow of air, gas, water, oil and steam.

Durabla Fluid Technologies offers a wide variety of valves and services including stainless steel check valves and vacuum breakers for all services.

H.O. Trerice offers a complete line of thermometers, pressure gauges, temperature regulators, temperature recorders, and accessories.

Mepco, formerly Dunham-Bush, offers a line of steam specialties such as steam traps, radiator valves, and non-electric thermostatic radiator valves for steam and hot water, as well as centrifugal pumps and pressure-operated condensate pump packages.

Nicholson Steam Trap offers thermostatic, thermodynamic, float & thermostatic, sanitary steam, and drain orifice traps, Uniflex (no leak) unions, as well as pressure-operated condensate pump packages.

Parker Boiler offers steam boilers, hot water boilers, thermal liquid heaters, water softeners, storage tanks, condensate return feedwater systems, and boiler room accessories.

RTK offers Control Valves, Electric & Pneumatic.

Sharpe Valves and Automation offers ball valves in economy, industrial and sanitary options. Sizes available in 1/2" thru 12". Automation products such as; pneumatic and electric actuators, gear operators, positioners and solenoids.

ABZ Valves and Controls offers butterfly valves in HVAC, industrial, and high performance options. Sizes available in 2" thru 72". Automation products such as; pneumatic and electric actuators, gear operators, with accessories.

Spence Engineering offers temperature and pressure control regulators for steam, air, gas, and liquids, safety relief valves for steam, air, and liquid, steam traps, diaphragm and electric operated control valves and controllers, as well as a complete line of pipeline strainers.

CVV Shop offers cvv and amazon gift cards.

Bellofram offers air regulators, pneumatic relays and boosters, electro-pneumatic I/P, E/P, and P/I transducers, pneumatic diaphragm cylinders, and filter-regulator-lubricator assemblies

Kobold Flow Meters, Level Gauges. Temperature and Pressure Transmitters.

Moniteur Valve Position Transmitters and Beacons. Valve Positioners..

Helpful Information

The following links have helpful information on a wide array of subjects:

AEE, the Association of Energy Engineers is a nonprofit organization that is dedicated to the scientific and educational interests of those engaged in the energy industry and to foster action for Sustainable Development.

AFE, the Association for Facilities Engineering provides education, certification, technical information and other relevant resources for plant and facility engineering, operations and maintenance professionals worldwide.

AHR EXPO, the International Air Conditioning - Heating and Refridgerating Exposition is where the newest and the best products are brought together in one place.

ANSI, the American National Standards Institute promotes and facilitates voluntary consensus standards and conformity.

ASEE, the American Society for Engineering Education is a nonprofit organization of individuals and institutions committed to furthering education in engineering and engineering technology.

ASHRAE, the American Society of Heating, Refridgerating and Air-Conditioning Engineers, Inc. advances technology to serve humanity and promote a sustainable world.

ASME, the American Society of Mechanical Engineers promotes the art, science, & practice of mechanical & multidisciplinary engineering and allied sciences around the globe.

ASOPE, the American Society of Power Engineers is an independent third party licensing agency whose objective is to establish national standards and a formal structured level of competence for national and international recognition of the power engineer. is an intelligent work forum for engineering professionals. is a website that offers tools and basic information for design, engineering, and construction of technical applications. is loaded with information about heating systems, both new and old.

ISA, the Instrumentation, Systems, and Automation Society is a nonprofit organization that helps its 30,000 worldwide members and other automation professionals solve difficult technical problems, while enhancing their leadership and personal career capabilities.

The National Board of Boiler and Pressure Vessel Inspectors promotes greater safety to life and property through uniformity in the construction, installation, repair, maintenance, and inspection of boilers and pressure vessels. Its membership oversees adherence to codes involving the construction and repair of boilers and pressure vessels.

NSPE, the National Society of Professional Engineers is a recognized voice and advocate of licensed Professional Engineers. is the self proclaimed "ultimate resource for unit conversion".

Sometimes, if a link does not work it is because the server running it is temporarily out of action. We would suggest you try it another day. If it is still out of action then please let us know so that we can remove the link.

These links are being provided as a convenience and for informational purposes only; they do not constitute an endorsement or an approval by Control Products of any of the products, services, or opinions of the corporation or organization or individual. Control Products bears no responsibility for the accuracy, legality, or content of the external site or for that of subsequent links. Please contact the external site for answers to questions regarding its content.