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Self-operated Temperature Regulators · Type 4u Temperature Regulator

Self-operated Temperature Regulators · Type 4u Temperature Regulator
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Self-operated Temperature Regulators · Type 4u Temperature Regulator - 1

T 2123 EN Self-operated Temperature Regulators · Type 4u Temperature Regulator With balanced single-seated globe valve Application Temperature regulator for cooling installations with control thermostats for set points from –10 to +250 °C Nominal sizes DN 15 to 150 · Nominal pressure PN 16 to 40 · Suitable for temperatures up to 350 °C The valve opens when the temperature rises. The regulators consist of a balanced globe valve with flanged connections and reversing device as well as 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 with a dial •• Single-seated valve with a plug balanced by a balancing diaphragm or stainless steel bellows •• Suitable for liquids, gases and vapors, especially for coolants, such as cooling brine or cooling water Fig. 1: Type 4u with Type 2231 Control Thermostat •• Valve body optionally available in cast iron, spheroidal graphite iron, cast steel or cast stainless steel Versions Type 4u Temperature Regulator · Type 2422 Valve with flanged connections · Balanced by a bellows (DN 15 to 150) · Balanced by a diaphragm (DN 65 to 100) · PN 16 to 40 · Type 2231 to 2235 Control Thermostat · Reversing device · Further details on the application of control thermostats can be found in Information Sheet u T 2010. –– Type 2422/2231 (Fig. 1) · With Type 2422 Valve and Type 2231 Control Thermostat · Suitable for liquids · Set point adjustment at the sensor · Set points from –10 to +150 °C –– Type 2422/2232 (Fig. 2) · With Type 2422 Valve and Type 2232 Control Thermostat · Suitable for liquids and steam · Separate set point adjustment · Set points from –10 to +250 °C –– Type 2422/2233 · With Type 2422 Valve and Type 2233 Control Thermostat · Suitable for liquids, air and other gases · Set point adjustment at the sensor · Set points from –10 to +150 °C Fig. 2: Type 4u Temperature Regulator with Type 2232 Control Thermostat, version with separate set point adjustment –– Type 2422/2234 · With Type 2422 Valve and Type 2234 Control Thermostat · Suitable for liquids, air and other gases · Separate set point adjustment · Set points from –10 to +250 °C SAMSON AKTIENGESELLSCHAFT · Weismüllerstraße 3 ·

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Self-operated Temperature Regulators · Type 4u Temperature Regulator - 2

Special versions –– 10 or 15 m capillary tube lengths –– Sensor of CrNiMo steel –– Capillary tube made of CrNiMo steel or plastic-coated copper –– Valve entirely of stainless steel –– Reduced KVS coefficient –– Reversing device version with travel adjuster (with adjustment of minimum flow rate) Principle of operation (see Fig. 3) The regulators operate according to the liquid expansion principle. The temperature sensor (12), capillary tube (9) and operating element (7) are filled with an expansion liquid. The temperature-dependent change in volume of this liquid causes the operating bellows...

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Flow rate diagram for water The following versions are available: –– Temperature regulators (TR) with a Type 2231, 2232, 2233, 2234 or 2235 Thermostat and a Type 2422 Valve in DN 15 to 150, for which the maximum operating pressure must not exceed the maximum permissible differential pressure Δp specified in the technical data. Sensors without thermowell: applicable up to 40 bar Sensors with thermowell: only use SAMSON G 1 version made of bronze, steel or stainless steel up to 40 bar, copper up to 16 bar. –– Thermowell for flammable gases typetested by DVGW, G 1 threaded connection, PN 100...

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Self-operated Temperature Regulators · Type 4u Temperature Regulator - 4

Table 2: Technical data ■ Valves ■ All pressures in bar (gauge) Type 2422 Valve ■ Balanced by a bellows ■ Balanced by a diaphragm 1) DN 15, 25, 40 and 50 only 2) Optionally with soft seal with standard Kys coefficients 3) Special version 1.4409 4) Soft-seated plug with EPDM ring for temperatures up to 150 °C 5) PN 16 only

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Table 4: Materials • Material numbers according to DIN EN

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Dimensional drawings: Type 2422 Valve · Balanced by a bellows · Balanced by a diaphragm · With connection for Type 2231 to Type 2235 Thermostat Thermostat with … Integrated set point adjustment Separate set point adjustment Ø25 Type 2231/Type 2233 Thermostat with Type 2422 Valve balanced by a diaphragm and reversing device Type 2231/Type 2233 Thermostat with Type 2422 Valve balanced by a bellows and reversing device Table 6: Dimensions in mm and weights · Type 2422 Valve Type 2422 Valve · Balanced by a bellows Valve size Forged steel Other materials Up to 220 °C (without extension piece)...

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Self-operated Temperature Regulators · Type 4u Temperature Regulator - 7

Clamps and perforated cover for wall mounting Table 8: Thermowells for Type 2231 and Type 2232 With flanges DN 32 for PN 40 DN 40 for PN 100 (dimensions for PN 100 in parentheses) With threaded connection G 1 for PN 40 and 100 (dimensions for PN 100 in parentheses) Thermowell made of copper: PN 16 Thermowells for Type 2231 and Type 2232 Table 9: Thermowells for flammable gases (G 1/PN 100) Control thermostat Add the dimension L to H and H1 when these accessories are used. Steel/CrNiMo steel Flanges PN 6 140 mm outside diameter Flange PN 40/DN 32 (dimensions in parentheses)

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