Control valves are used in industrial hydraulics and plumbing applications to control pressure, flow, and temperature. The control valve serves as the point-of-regulation for any system. Control valves are found in a variety of industries, including domestic water systems, aerospace, oil & gas, chemical, power generation, and paper & pulp.
In order to understand how control valves work, it’s important to first understand how fluid moves through a system. Fluid is moved through a system by means of pressure, which can be regulated by an actuator, such as a manual, electric, or pneumatic valve. Pressure variations in a system cause changes in the flow of fluid and these changes can be controlled using a control valve.
Control valves are typically installed in the piping at strategic points where regulation of the pressure or flow is required. This allows for the valve to be used in a variety of applications, such as controlling pressurized water in a domestic application, a gas turbine in a power plant, or a compressor in an industrial setting.
The three main types of control valves are globe, gate, and diaphragm valves. Globe valves are often used in the regulation of fuel or air in the process industry. They are relatively easy to use and maintain, and have a high flow capacity and a long service life. Gate valves are often used in the water industry, as they are highly reliable and there is no risk of leakage. Diaphragm valves are used in a variety of industries, including food processing and medical applications, as they provide accurate regulation of the pressure and temperature.
When selecting and installing a control valve, it is important to consider the environmental conditions and the system pressure, as well as the type of media, such as water, oil, or gas, that the valve will be controlling. It is also important to consider the valve’s capacity and range of operation, as well as its efficiency and safety features. Control valves must also meet certain industry standards, such as those set forth by organizations like API (American Petroleum Institute) or ANSI (American National Standards Institute).
Control valves are an essential part of any hydraulic or plumbing system, and it is important to select the right valve for the job. By understanding the different types of control valves, their design and construction, and the industry standards that regulate them, one can ensure the optimal performance of their system.