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Danfoss

"Engineering Tomorrow"

Founded 1933 Denmark premium price 40,000+ employees

About Danfoss

Danfoss is a Danish multinational corporation and a global leader in engineering solutions for climate, energy, and infrastructure. Founded in 1933 by Mads Clausen, the company employs over 40,000 people in 100+ countries. In the plumbing and HVAC sector, Danfoss manufactures thermostatic radiator valves, hydronic balancing valves, heat exchangers, and variable speed drives for pump systems. Their products help optimize energy efficiency in heating, cooling, and water distribution systems.

Known for: Thermostatic radiator valves, hydronic balancing solutions, and energy-efficient HVAC controls

Product Categories

Valves

Danfoss manufactures thermostatic radiator valves (TRVs), hydronic balancing valves, pressure-independent control valves, and zone valves for HVAC and hydronic plumbing systems. Their products are widely specified in commercial buildings, district energy systems, and high-efficiency residential heating installations.

Product Lines: RA-N Thermostatic Valves AB-QM Balancing Valves ASV Automatic Balancing Zone Valves
View Danfoss Valves

Certifications & Standards

ISO 9001 UL Listed CSA Certified

Warranty

Varies by product line; typically 2-5 year manufacturer warranty

Related How-To Guides

How to Replace a Shut-Off Valve

Swap a stuck, leaking, or unreliable shut-off valve for a modern quarter-turn ball valve -- compression, threaded, and push-fit connections all covered.
How to Adjust a Pressure Reducing Valve

Test your water pressure, find the PRV on your main line, and adjust it to a safe 50-60 PSI -- before high pressure wears out your fixtures, appliances, and water heater.
How to Fix a Leaking Gate Valve

Stop a dripping gate valve stem -- tighten the packing nut, replace the packing, or swap the whole valve for a ball valve, depending on what the situation calls for.

Common Problems

Stuck Shut-Off Valve

Usually discovered during an emergency -- something is leaking and the valve will not budge. Older gate valves seize after years of disuse. Fix ranges from penetrating oil and patience to full replacement.
Leaking Valve Stem

Water dripping from around the valve handle or packing nut -- packing failure, not a pipe leak. Fix is usually tightening the nut or replacing the packing, often with the water still on.
PRV Failure -- High Water Pressure

Failing PRV lets dangerously high pressure into the house. Bursts supply lines, damages appliances, causes hammer, shortens fixture life, leaks everywhere. Normal is 40-60 PSI. Above 80 is dangerous and needs immediate attention.