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How to Select the Right Flow Control Valve

flow control valveSelecting the right flow control valve is not an amateur’s job. Valves may be common as they go; choosing the correct valve for your gas and liquid flow can take up some time and can be confusing. Are you confused about how to select the right control valve? We have gathered some tips before you buy the correct valve for you. 

Determine the Valve Size and Type

The most crucial step in selecting the right valve is to know what you need. Then the rest will follow–not quite. You also need to know the size of the valve that you’ll be using. When you size a control valve, the basic rule is to size it so that it operates somewhere in between 20-80% open at the maximum required flow rate. If it is possible, the size should at least be at a 20% minimum required flow rate. When you size your valve this way, you can use as much of the valve’s control range while maintaining a reasonable safety factor. 

There are also plenty of types of valves: globe, ball, and butterfly. The type of valve is usually predetermined by its application. So you have to make a diagram before heading off to buy one.

Determine the Proper Valve Material

In gas and liquid flow systems, it is best to predetermine your materials of construction. When you understand the incompatibilities, then you’ll understand that valves are subject to a varying range of corrosion, temperature, and tearing. 

Materials that commonly used in high-pressure applications are ductile iron, brass and bronze, 316 stainless steel, Monel, and Inconel, while seals, gaskets, and packing are made of Polyurethane, Viton, PTFE, Glass-filled PTFE and PEEK (Polyetherketone). 

Determine the Performance Requirements

The efficiency of your flow system is predetermined by the required pressure and temperature of your flow. Pressure and temperature directly affect the performance, safety and durability of your flow system. 

You can opt for metal valves because they can endure higher temperatures and pressures. Metal valves are also usually best for pressurized gases because they can hold stronger than plastic valves.

Maintenance and Longevity of the Valve

While you’re at it, you must also consider the ongoing maintenance. When you choose a valve, you should pay attention to its maintenance requirements. The maintenance requirements are for both valve reliability and application stability. You can also avoid spending more in the upcoming years.

Those were our tips on how to select the right flow control valve. However, please take note that there will always be complications in application requirements, operating conditions, and chemical compatibility. But knowing what you need is a great start. If you ever require more expert help, we at MasterMac can help you with your valve needs. Contact us now.

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