Constant Temperature Radiator HeadThe constant temperature radiator valve controls the outlet temperature of the equipment by controlling the inlet flow of heat exchangers, air conditioning units or other hot and cold equipment. TRV radiator thermostatic valves fit 30 x 1.5 threaded connections, please note thermostatic valve head only. Smart Design with 5-level Temperature AdjustmentThis TRV thermostatic radiator valve has 5-level temperature adjustment, just turn the valve head to the corresponding number, if you want to close the thermostat, just use the modulation index arrow 0. [Installation points] Attention should be paid to the installation of the radiator thermostatic valve: The valve body is installed at the inlet of the radiator, please pay attention to the direction of the arrow when installing. In order to facilitate the installation of the thermostat, the handle should be adjusted to the maximum opening position (No. 5 position) before installation, and the thermostat locking screw should be screwed to the valve body. [Necessary for household use] The thermostatic heating valve is installed and connected by thread, with stable performance, good heat dissipation effect and easy operation. It has antifreeze and regulating functions to automatically control the temperature of free-standing radiators, convectors and other heating devices with standard capacity requirements in hot water systems. The room temperature is continuously monitored and adjusted to ensure consistent comfort and avoid overheating.