T 2175 EN Type 43-1 and Type 43-2 Temperature Regulators Series 43 Self-operated Temperature Regulators · ANSI version Application Set points from 30 to 300 °F (0 to 150 °C) with valves ½ NPT to 1 NPT as well as NPS ½ and 1 · Pressure rating Class 150/ 300 · Suitable for gases up to 175 °F (80 °C), liquids up to 300 °F (150 °C) The valves close when the temperature rises. Regulators for district heating systems, heat generators, heat exchangers and other HVAC and industrial applications. Special features •• Low-maintenance proportional regulators requiring no auxiliary energy •• Temperature sensor suitable for installation in any desired position and for operation at high excess temperatures of 120 °F (50 °C) above the set point, designed for operating pressures up to 580 psi (40 bar) •• Spring-loaded, single-seated valve without pressure balancing or plug balanced by a bellows •• Particularly suitable for district heating supply networks •• Suitable for gases and liquids •• Compact design with particularly low overall height •• Valve body made of stainless steel Fig. 1: Type 43-1 Temperature Regulator · Body with screwed ends Version (Fig. 1) The regulator consists of a valve and a control thermostat with set point adjuster, capillary tube and temperature sensor operating according to the adsorption principle. Additionally, the following are available: See Data Sheet u T 2176 for versions with double adapter or manual adjuster for the attachment of additional control thermostats –– Safety temperature monitors (STM) and safety temperature limiters (STL). For more details refer to Data Sheets u T 2183 and u T 2185. –– Further details on the selection application of typetested equipment can be found in Information Sheet u T 2181. –– Temperature regulator with Type 2431 Valve –– Type 2430 Control Thermostat –– Body made of stainless steel (A351 CF8M) with screwed ends (½ NPT, ¾ NPT and 1 NPT female thread), Class 300 –– Sensor optionally with or without thermowell Type 43-2 –– Temperature regulator with Type 2432 Valve –– Type 2430 Control Thermostat –– Flanged valve body made of stainless steel (A351 CF8M) · NPS ½ and 1, Class 150 –– Sensor optionally with or without thermowell Accessories and combinations –– Thermowell: copper, Class 300 CrNiMo steel, Class 300 –– Double adapter Do3 or manual adjuster Data Sheet u T 2176 Special versions –– –– –– –– 16.4 ft (5 m) or 32.8 ft (10 m) capillary tube length Oil-resistant internal valve parts CV (KVS) coefficients Fast-responding thermostats for instantaneous water heater (operating according to the vapor pressure principle) SAMSON AKTIENGESELLSCHAFT ·

Principle of operation (see Fig. 2) The temperature regulators work according to the adsorption principle. The temperature of the measured medium creates a pressure in the sensor which is proportional to the measured temperature. This pressure is transferred through the capillary tube (12) to the operating element (10) and converted into a positioning force. This force causes the pin of the operating element (11) to move the plug stem (4) with the valve plug (3). By turning the set point adjuster (9), the point of response is changed over the valve spring (5). The valves are balanced by a piston...

Table 1:  Technical data · All pressures in bar (gauge) Valve Type 43-1 Temperature Regulator Type 43-2 Temperature Regulator Female thread Pressure rating Max. permissible temperature Max. perm. differential pressure Δp Leakage class according to IEC 60534-4 Type 2430 Control Thermostat Set point range 2) (continuously adjustable) Capillary tube length 3) Perm. temperature at the sensor 120° F (50 °C) above the adjusted set point Max. permissible ambient temperature Permissible pressure at sensor/thermowell 1) 2) 3) 4) Max. input pressure 275 psi (19 bar) Further set point ranges on request...

Table 4:  Dimensions and weights Regulators with body with screwed ends or flanged body · A351 CF8M (1.4408) Connection size Female thread Width across flats SW Weight with bulb sensor and thermowell (approx.) 1) 1) Version without thermowell: minus 0.44 lb (0.2 kg) Body with screwed ends Flanged body

Special version: vapor pressure thermostats Fast-responding temperature sensors Application The temperature sensors operating according to the vapor pressure principle are particularly suitable for use in instantaneous water heaters (versions for plate heat exchangers on request) due to the fast response time of approx. 3 s. Type 43-1/43-2 Temperature Regulator –– Temperature set points from 110 to 150 °F (45 to 65 °C) –– With Type 2430 Control Thermostat combined with a valve –– Valve sizes ½ NPT to 1 NPT or NPS ½ and 1 –– Pressure rating: Class 150 or Class 300 –– Sensor made of copper or CrNiMo...

Table 5: Mounting position and materials 1) Type 43-8, with instantaneous plate heat exchangers Ordering text Type 43-1 Temperature Regulator ... NPT Set point range ... °F (°C) Body made of stainless steel (A351 CF8M) Optionally, special version ..., accessories ... Type 43-2 Temperature Regulator NPS ... Set point range . °F (°C) Body made of stainless steel (A351 CF8M) Optionally, special version ..., accessories ...