Brian Craig
September 27, 2021
Control valves are an integral part of various industrial applications, such as power generation units, oil and gas plants, fire prevention systems, and more. These control valves are available in different types and specifications. Temperature control valves are one of the popular valve types used today. These devices are designed to control the fluid temperature in the system to ensure efficient process operations. The temperature control valve controls the fluid flow, flow rate, and the process quantities, such as temperature, pressure, and liquid levels. Is that all? Obviously not. How does a temperature control valve work? What types of temperature control valves are in use today? Are you bothered with these questions? If yes, this post answers all questions regarding temperature control valves. So, stay tuned.
Temperature control valves are also called temperature regulators. They are common control elements used in the process control industry. They are similar to other control valves; however, the difference is in controlling process temperatures at a specific level. They are used to control the temperature of the fluid in compressors, engine jacket water, turbines, and so on. Often abbreviated as TCV, they are also used in cogeneration systems to control varying temperatures and ensuring the cooling of the engine. Temperature control valves are distinguished based on the number of ports they have. It means the control valve with two ports is a 2-way valve and the one with three ports is a 3-way valve.
Before getting into the working of the temperature control valve, it is important to understand its structure. The structure of the temperature control valve comprises four main parts- - the temperature detecting element, sensor, power source, and controlling medium. The temperature detecting element is a temperature sensor responsible for sending either an electrical or mechanical signal to the actuator. Later, the actuator uses this signal to act on the power source that determines the valve’s position.
The temperature control valve operates on a mechanical temperature measuring instrument. The temperature control valve or temperature regulator uses a filled bulb as a temperature sensor. Due to the material’s thermal expansion properties, it expands with a temperature rise. This expansion trigger stress in the pressure of the actuator. This pressure changes the position of the valve on the regulator that controls a coolant’s flow rate.
The temperature control valves use two popular temperature control schemes as described below.
Temperature control valves are utilized across a wide range of industries to maintain precise thermal conditions in critical processes and systems.
If you are looking to install temperature control valves for your applications, it is always a good practice to consult an industry-leading valve supplier before making any decision. The Transmitter Shop is a one-stop solution for you. The company offers a wide range of control valves from top industry brands, like Fisher.
A temperature control valve is typically installed at points where precise temperature regulation is required — such as downstream of heat exchangers, within cooling loops, or before sensitive equipment like turbines or compressors.
The valve senses temperature changes using a thermal sensor and adjusts fluid flow to maintain a predefined setpoint, either by mixing hot/cold fluids or through heat exchange.
A temperature valve regulates thermal conditions by adjusting flow based on heat readings, whereas a pressure valve controls fluid pressure irrespective of its temperature.
Yes, most temp control valves are designed to manage both heating and cooling cycles, depending on system configuration and application.
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