RA-N/ RA-U PURE valve bodies are manufactured from brass containing less than 0.1% lead with nickel plating. All RA-N/ RA-U PURE valve bodies can be used together with all types of thermostatic elements in the RA 2000 series and with TWA-A thermal actuators. RA-N/ RA-U PURE valves are used in two-pipe heating systems and comes in series S. RA-N/ RA-U PURE valves are fitted with a kv limiting device for pre-setting of max. water flow and are available with the setting ranges. Each valve body is supplied with a protective cap, which can be used for manual regulation during the construction phase. This cap must not be used as a manual shut off device. A special manual shut off device is available as an accessory.