Brass Anthracite Straight Inline Thermostatic Radiator Valves Set with Lockshield Thermostatic valves are typically used for regulating the fluid flow to the radiators of central heating systems and / or heated towel rails. They are provided with a regulating element which automatically controls the opening of the valve to regulate the ambient temperature of the room. The number on the valve corresponds to a specific air temperature. Specification: Compact Design 1/2" BSP MI outlet Connections: 15mm inlet Colour: Anthracite Thermostatic temperature control Lock shield valve is connected to the return Inline radiator valves with standard 15mm compression fittings Compatible with radiators and heated towel rails Durable solid brass construction with anthracite powder coat finish Features standard ½” threads on each valve Supplied as a pair of valves Thermostatic Head and Reversible Body Built in sensor with Liquid Element Lock shield valve is connected to the return Frost Protection Pipe Material: Solid Brass Smooth Operation with High Quality Components Graduated Scale from 0 to 5 corresponding to temperature ranges 7°C - 32°C Fully Tested 10bar Max Pressure Drop 46 Ft.W.G Max Flow Temperature 110°C Sensor Type: Liquid Hysteresis: 0.2K Differential Pressure Effect: 0.15K Effect Static Pressure: 0.3K Can Be mounted Horizontally or Vertically 1/2" BSP Standard 15mm compression inlet, Manufacturer: SPARES2GO