Control Valves
Unyazi supplies industrial control valves designed to regulate flow, pressure, temperature and process conditions across a wide range of applications.
These valves respond to changes within the system and adjust automatically to keep the process close to its required setpoint. They are commonly used with liquids, gases, steam and chemical media where stable and accurate control is essential.
How Control Valves Work?
A control valve changes the flow of process media by adjusting the position of an internal plug, disc or ball. The movement is controlled by an actuator that responds to signals from the process control system. As operating conditions change, the valve opens or closes to keep the required flow, pressure or temperature within the desired range.
This allows the process to respond automatically to changes in demand, helping to maintain product quality, system stability and efficient operation.
Key Benefits
Accurate Process Regulation
Control valves make small, controlled adjustments to manage flow, pressure and temperature. This helps keep the process close to the required operating point.
Improved System Stability
Automatic valve movement helps the system respond to changing loads. This reduces process fluctuations and supports more consistent operation.
Better Energy Efficiency
Correctly selected control valves can reduce unnecessary pressure loss and energy use. This helps the wider process operate more efficiently.
Reduced Equipment Strain
Stable flow and pressure can help protect pumps, pipework and downstream equipment. This may reduce wear and extend equipment life.
Smart Monitoring Options
Control valves can be fitted with digital valve controllers and positioners. These provide operating data that can support diagnostics and maintenance planning.
Different Process Conditions
Valve materials, trim designs and flow characteristics can be selected for liquids, gases, steam and chemical media. This allows each valve to be matched to the application.
Where are Control Valves used?
Control valves are used wherever a process variable must be adjusted automatically and accurately. Their ability to respond continuously makes them suitable for processes where stable operation and accurate control are important.
Steam pressure and temperature controlWater and process fluid regulationChemical dosing systemsGas flow controlCooling and heating circuitsProduction and processing plantsHigh-pressure industrial systems
Selecting the Correct Control Valve
Choosing the correct control valve requires a detailed review of the process conditions. The expected flow rate, inlet and outlet pressure, temperature, media and required control range must all be considered.
Unyazi assesses the valve size, flow coefficient, trim design, materials and operating characteristics to ensure the selected valve suits the process.
We also consider the required response speed, pressure drop and the risk of noise, cavitation or erosion. This helps improve control accuracy and reduce premature valve wear.
Actuation and Digital Control
Control valves can be fitted with pneumatic, electric or hydraulic actuators depending on the process and available control system. Digital valve controllers and smart positioners can also be added to improve valve response and provide information on position, travel and operating condition.
This data can help identify developing problems before they cause a process interruption. Unyazi can assist with matching the valve, actuator and controller to the wider automation system.
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