Radiator Actuators and Thermostatic Radiator Valves (TRV)

For all your building control needs, we offer dozens of radiator actuators, as well as various replacement parts and accessories from brands like Danfoss and Johnson Controls.
View Details V48AD-2C | THREE WAY PRES ACT WATER; 1" 145/190# R-22 | Johnson Controls
$745.60 each
View Details KIT14A-612 | FLANGE KIT FOR 1 1/2"; WATER VALVE | Johnson Controls
$284.83 each
View Details V11HDA-100 | 3-WAY AIR VALVE; W/BARBED; 440-480 V. 50/60 HZ. | Johnson Controls
$250.60 each
View Details V11HBA-100 | 3-WAY AIR VALVE;W/BARBED; 220-240 V. 50/60 HZ. | Johnson Controls
$250.60 each
View Details VG7241NT | VALVE 2-W PDTC DN25 | Johnson Controls
VG7241NT | VALVE 2-W PDTC DN25 | Johnson Controls
Brand: Johnson Controls
SKU: VG7241NT
$187.21 each
View Details 065F1242 | VMT 1" STRAIGHT Valve, M. NPT Connection, 9.4 Cv | Danfoss
$181.81 each
View Details 013G8564 | RA 2000 FE-FF 2+2m, white DUSA | Danfoss
$171.43 each
View Details 013G8252 | RA2000 Valve mounted dial with remote sensor | Danfoss
$89.66 each
View Details 013G8250 | RA2000 Valve mounted dial and sensor | Danfoss
$66.46 each
View Details 013G8139 | RA2000 tailpiece, 3/4" F. Sweat  | Danfoss
$31.18 each

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More About Radiator Actuators and Thermostatic Radiator Valves (TRV)

HOW DOES THE THERMOSTATIC RADIATOR VALVE WORK?

A thermostatic head and a valve body make up a thermostatic radiator valve (TRV). The actuator in the thermostatic head expands and contracts in response to changes in temperature. The supply of water (or steam, in two-pipe setups) into the radiator is closed and opened by a sprung plunger inside the valve body.

When the two are combined, the radiator's heat supply is automatically adjusted based on the ambient temperature. The valve closes and the radiator stops heating when the space reaches the desired temperature. The valve then opens, the room cools, and the radiator starts to heat up once more.

The amount that the actuator must expand to close the valve can be changed by turning the thermostatic head's handle. A common TRV scale runs from 1 to 5, with 1 marking the shortest distance and 5 representing the longest. 

In order to prevent frost, thermostatic radiator valves are made to allow a tiny amount of water to pass through when the room is chilly. Use the decorator cap that comes with the valves if you need to totally close the valve.

WHAT ARE THE MOST POPULAR THERMOSTATIC RADIATOR VALVE PRODUCTS IN OUR SELECTION?

The most popular TRV product so far is 013G8568 TRV Operator by Danfoss. This device is wall-mounted and comes with a remote sensor & dial. This is a great option for any home HVAC control system.

Secondly, we have the 013G8252 Dial with the Remote Sensor. Valve mounted, this device allows you to accurately control the room temperature to the desired comfort level.

Last but not least, the 013G8250 Dial is known for its reliability, precision, and high-quality materials.

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