The SV-12 Series has a vent port size for every room location, with the largest size for the coldest rooms and the smallest size for the "too hot" rooms. SV-12 air vents are easy to install on any steam radiator.
The Armstrong RV-4 one-pipe radiator valve is a state-of-the-art thermostatic radiator valve for low-pressure steam service. The valve provides accurate and automatic control of the temperature in individual rooms, through automatic air venting.
United States
