This stylish, anthracite angled valve will not only complement your radiator, it s a great energy saver too! Inside the valve the opening is controlled by a regulating element, which stops unplanned temperature increases and helps you save energy by maintaining your desired temperature. To choose your temperature simply twist the head to choose a number. A lockshield valve is used to balance out all the radiators in your home, ensuring they all heat up at the same rate. Thermostatic Temperature Control Thermostatic valves are fantastic for ensuring you have a constant stable temperature without any unplanned temperature rises which waste energy. The valve contains a regulating element which controls the valve opening, maintaining your desired temperature at all times. Simply twist the.