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Selection Considerations for Control Valves Versus Regulators
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Selection Considerations for Control Valves Versus Regulators
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From Jordan Valve Group
In any control system, the option potentially exists to select either a control valve or a regulator and it is useful to compare the respective performance and economics of these approaches to arrive at some general selection guidelines.
Unlike regulators, control valves are not standalone products. A control valve is the final control element in a control system and needs to be evaluated in that context. A control valve is most frequently used in the control of the following parameters:
• Temperature
• Pressure
• Flow
• Level
However, in principle, any continuously varying system parameter that can be measured and compared to a set point can be controlled. Also, it is necessary to keep in mind, irrespective of the parameter being controlled (the controlled variable), that the control valve itself can only change the flow rate.
Products & Services
Pressure regulators are used to maintain a constant outlet pressure or flow.
Gas pressure regulators reduce the pressure of a gas, as it passes through a cylinder or process line, to another piece of equipment. Regulators are not flow control devices. They are used to control delivery pressure only.
Hydraulic regulators maintain the output pressure at a set value.
Pressure relief valves are self-actuated safety valves designed to relieve excess pressure upstream from the line.
Filter, regulator, lubricator (FRL) assemblies are pre-packaged or modular assemblies of common configurations of air filters, regulators, lubricators, and gauges.
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Technical Articles
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