43-3 Type 3-Way General Process Temperature Regulators

The Type 43-3 self-acting temperature control valve, engineered for broad industrial applications, presents an unbalanced three-way configuration, featuring options for flanged, threaded, and welded connections. Utilising the adsorption method, it includes a thermostat for adjusting the set point, alongside a capillary tube and a temperature sensing device. Ideal for both mixing and diverting tasks, this valve modulates flow in response to temperature fluctuations, functions at pressures up to 580 psig, and facilitates straightforward adjustments to the set point.

Key Features

Key features and benefits of 43-3 Type 3-Way General Process Temperature Regulators

Key Features

The Type 43-3 offers a range of end connections including flanged, threaded, and welded, making it adaptable to various industrial piping systems.

Key Features

Utilises the adsorption process for temperature regulation, equipped with a thermostat, capillary tube, and temperature sensor for precise set point adjustments.

Key Features

Designed to operate efficiently at pressures up to 580 psig, suitable for high-pressure applications, with easy set point modification for optimal performance in mixing or diverting operations.

Regulator Standards & Stuff

Nominal Diameters: DN15 to DN50 (1/2" to 1")
Pressure Classes: PN25 (Class 250)
Materials: Red Brass CC491K/CC499K
Temperature Range: up to 150°C (up to 300°F)
Set Points Range: 0 to 150 °C
Application: Temperature Regulators for Mixing and Diverting Service in Heating or Cooling Installations
Versions: 43-3
Weight Range(kg); 1.5 to 3.7


A Valve Temperature Regulator is a control valve that automatically adjusts the flow of a fluid to maintain a desired temperature. It operates without external power, using a thermal actuator that responds to fluid temperature.

These regulators use a sensing element that expands or contracts with temperature changes. This movement is mechanically linked to a valve that adjusts the flow of the heating or cooling medium to maintain the set temperature.

There are mainly two types: direct-acting, where the sensor is directly connected to the valve, and pilot-operated, which uses a pilot valve to control the main valve. Selection depends on the application's size, temperature range, and precision required.

They are critical for processes that require precise temperature control for safety, efficiency, and product quality. They help in reducing energy consumption and ensuring the longevity of equipment by preventing overheating or undercooling.

Yes, they are versatile and can be designed for either heating or cooling applications. The selection depends on the control action needed to maintain the desired temperature within a system.

Key factors include the control range, the temperature sensitivity required, the medium being controlled (water, oil, gas, etc.), the flow rate, and the operating environment. It's also important to consider the regulator's material compatibility with the fluid.

Installation guidelines vary by model, but generally, it should be mounted in a location where it can accurately sense the temperature without being affected by external conditions. It's important to follow manufacturer recommendations for orientation and to ensure proper piping practices.

Regular maintenance includes checking for leaks, ensuring the actuator moves freely, and verifying the accuracy of the temperature control. Troubleshooting may involve inspecting for clogs, recalibrating the temperature set point, or replacing worn parts.

Symptoms include inability to maintain the set temperature, fluctuating temperatures, leaks, or unusual noises during operation. Such signs indicate the need for inspection and possibly repair or replacement.

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43-3 Type 3-Way General Process Temperature Regulators