Thera-3 thermostatic heads are installed on valve bodies (TRV). The thermostatic head in combination with the TRV regulates the room temperature by regulating the flow of heating water to the heating device. TRVs are installed in water heating systems at the inlet or (less often) at the outlet connection of radiators or other heating systems. The heads correspond to European standards ČSN N215.

Thermostatic heads of this type with M30 × 1.5 connection thread are suitable for all TRV bodies and radiator inlets with M30 × 1.5 connection thread and 11.5 mm control mandrel. Heads with Danfoss connection are suitable for TRV bodies and valve inserts with Danfoss compatible connection (RA). Thermostatic heads with Herz (Hz) connection are suitable for TRV bodies with M28 × 1.5 connection and 9.5 mm control mandrel.

Main features

• With the connection thread M30 × 1.5, they correspond to the ČSN EN215 standard
• Version with built-in liquid or wax sensor
• Simple range restriction
• Version with zero position or only with frost protection

Installation example