Applications of control valve
Control valves are used in industries such as petroleum refining, chemical and petrochemical manufacturing, nuclear power plants and fossil fuel power plants, natural gas processing and many others.
In such industries, control valves are an essential component of the systems used to control important operational parameters like pressure, temperature, liquid levels and flow rates.
Pressure control valves may be used to reduce liquid or gas pressures or they may be used to maintain a back-pressure (i.e., a pressure upstream of the valve). They may also be used to maintain a pressure difference between two points in a process.
Temperature control valves are used to maintain liquid or gas temperatures within process vessels or to control the heat transfer within heat exchangers and process heaters or furnaces.
Level control valves are used to maintain liquid levels within a desired range in process vessels or tanks. In some cases, they may also be used to maintain levels of solid particles.
Flow control valves are used to control the volumetric or mass flow rate of liquids and gases. They may also be used to maintain a desired ratio between two flows, in which case they are part of what is called a flow ratio controller.
2012-08-29
