These 15mm thermostatic radiator valves are designed to regulate the flow of fluid to radiators in central heating systems. They feature adjustment elements that control the valve opening to maintain a constant room temperature at the selected set point. The valves offer 5 temperature settings, including frost protection. Each number on the valve corresponds to a specific air temperature, and once set, the thermostatic valve will maintain that temperature, helping to prevent unnecessary heating and reduce energy consumption.The valve includes a thermostatic head and a bidirectional two-way valve body. It has a built-in sensor with liquid-filled components for accurate temperature response. Suitable for horizontal or vertical installation.Water pipe connection diameter: 15 mm Water pipe connection caliber: 20 mm Working pressure: 1.6 bar Maximum temperature: 120 degrees Maximum flow: 360 L/h Normal flow: 170 L/h Maximum pressure loss: 600 mbar Sensor type: Liquid-filled Finish: Chrome polished Color: White Material: Copper Package Contents: 2 x Thermostatic Radiator Valve Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowed is +/- 1-3 cm.