Self-operated Temperature Regulators Type 8 Temperature Regulator Unbalanced three-way valve · Flange connections Application Temperature regulators with mixing or diverting valve designed for plants that are heated or cooled using liquids Control thermostats for set points from –10 to +150 °C Three-way valves DN 15 to 50 · Nominal pressure PN 16 Suitable for temperatures up to 150 °C Note Temperature regulators (TR), safety temperature monitors (STM), and safety temperature limiters (STL) tested according to DIN EN 14597 are available. The regulators consist of an unbalanced three-way valve and a control thermostat with temperature sensor, set point adjuster with excess temperature protection, capillary tube, and operating element. Special features •• Low-maintenance proportional regulators requiring no auxiliary energy •• Wide set point range and convenient set point adjustment •• Three-way valve, optionally available with a plug arrangement to mix or divert liquids •• Flow rate across the port AB almost independent of the valve plug position •• Cast iron valve body •• Versions with double adapter for temperature limiters or attachment of a second control thermostat. Versions Type 8 Temperature Regulator with three-way valve · With Type 2118 Valve · Valve body made of cast iron EN-JL1040 Nominal size DN 15 to 50 · PN 16 · Type 2231 to 2235 Control Thermostat Three-way valves with optional plug arrangements for either mixing or diverting service. Further details on the application of thermostats can be found in Information Sheet u T 2010. Fig. 1: Type 8 Temperature Regulator with valve (DN 25) with Type 2231 Control Thermostat Type 2118/2231 (Fig. 1) · With Type 2118 Valve and Type 2231 Control Thermostat · Suitable for liquids and steam Set points from –10 to +150 °C · Set point adjustment at sensor Type 2118/2232 (Fig. 2) · With Type 2118 Valve and Type 2232 Control Thermostat · Suitable for liquids and steam Set points from –10 to +150 °C · Separate set point adjustment Type 2118/2233 · With Type 2118 Valve and Type 2233 Control Thermostat · Suitable for liquids, air, and other gases Set points from –10 to +150 °C · Set point adjustment at sensor Type 2118/2234 · With Type 2118 Valve and Type 2234 Control Thermostat · Suitable for liquids, air, and other gases Set points from –10 to +150 °C · Separate set point adjustment Type 2118/2235 · With Type 2118 Valve and Type 2235 Control Thermostat · Installation in air-heated storerooms as well as drying, climatic and heating cabinets · Set points from –10 to +150 °C · Separate set point adjustment and a sensor tube to be installed on site Associated Information Sheet Fig. 2: Type 8 Temperature Regu

–– 5, 10 or 15 m capillary tube length –– Sensor of CrNiMo steel –– Capillary tube made of CrNiMo steel or plastic-coated copper Principle of operation (see Fig. 3 and Fig. 4) The regulators operate according to the liquid expansion principle. The temperature sensor (11), capillary tube (8), and operating element (7) are filled with an expansion liquid. The temperature-dependent change in volume of this liquid causes the operating element to move and, as a result, also moves the plug stem (5) with the attached plug (3). The position of the plug determines the flow rate of the heat transfer medium...

Table 1: Technical data ■ All pressures in bar (gauge). The listed permissible pressures and differential pressures are restricted by the specifications in the pressure-temperature diagram and the nominal pressure. 1 Type 2235 not available in stainless steel version 2) Only for nominal pressure PN 16

Arrangement of temperature regulators with three-way valves (depending on the plug arrangement in valve) · Schematics Plug arrangement I for mixing service Mixing valve Port B closes and port A opens when the temperature rises Plug arrangement II for diverting service Mixing valve in the return flow pipe in the return flow pipe Cooling Diverting valve Port A closes and port B opens when the temperature rises Diverting valve in the return flow pipe in the return flow pipe Flow rate diagram for water Typetested safety devices The specifications apply to a fully open valve The register number is...

Dimensions • Type 2118 Three-way Valve with thermostat Valve DN 15 to 50 Type 2231/2233 Type 2232/2234 Thermostat All d imensions in mm With separate set point adjustment Fig. 6: Dimensions • Valve and thermostats • See Table 3 Table 3: Dimensions in mm and weights

Thermowells for Type 2231/2232 (thread/flange) 71 028(029.5) With threaded connection G 1 for PN 40, PN 100 (di sions for PN 100 in parenth, thermowell made of copper: PN 16 Thermowells for flammable gases (G 1/PN 100) _ 028(029.5) With flanges DN 32 for PN 40 DN 40 for PN 100 (dimensions in parentheses) Flange for Type 2233 and Type 2234 (steel/CrNiMo steel) Add the d imension L to H and H1 when these accessories are used. Flanged connection PN 6; 140 outside 0 Flange PN 40/DN 32 (dimensions in parentheses) All d imensions in mm Fig. 7: Dimensions of accessories Accessories Thermowells with...