radiator actuators and thermostatic radiator valves (trv)

We offer dozens of radiator actuators, as well as various replacement parts and accessories from brands like Danfoss and Johnson Controls. Order today!
View Details Danfoss 013G8564 RA 2000 FE-FF 2+2m, white DUSA  | Blackhawk Supply
$66.77 each
View Details Johnson Controls VG7241NT VALVE 2-W PDTC DN25  | Blackhawk Supply
VG7241NT | VALVE 2-W PDTC DN25 | Johnson Controls
Brand: Johnson Controls
$111.79 each
View Details Johnson Controls V48AD-2C THREE WAY PRES ACT WATER; 1" 145/190# R-22  | Blackhawk Supply
$240.78 each
View Details Johnson Controls V11HDA-100 3-WAY AIR VALVE; W/BARBED; 440-480 V. 50/60 HZ.  | Blackhawk Supply
$801.96 each
View Details Danfoss 013G8139 RA2000 tailpiece, 3/4" F. Sweat   | Blackhawk Supply
$334.14 each
View Details Danfoss 013G8132 RA2000 1" Union Nut   | Blackhawk Supply
013G8132 | RA2000 1" Union Nut | Danfoss
Brand: Danfoss
SKU: 013G8132
$31.81 each



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.


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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as experts in Radiator Actuators and Thermostatic Radiator Valves (TRV)