Valves are used to handle a wide variety of functions in controlling the flow of liquids and gases. With so many options available, it’s important to look at all of the factors to ensure you are selecting the correct valve for your application.
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1. Media Type
The characteristics of the liquid or gas type being controlled will determine the valve material that should be used. When monitoring harsh or corrosive materials, polytetrafluoroethylene (PTFE) and perfluoroalkoxy alkanes (PFA) are great choices, as they are able to withstand these conditions. When monitoring pressurized gases, it’s important to use metal valves for the highest level of safety.
2. Application Conditions
The selection of the correct valve sizing is the most important step in selecting the right valve for your application. An improperly sized valve can cause operation issues within the valve or elsewhere in the system. In addition to this, determine the temperature, pressure, and flow rate that your valve will be operating under. In most cases, metal valves can withstand higher temperatures and pressures than plastic ones.
3. Valve Function
Determine the need that your valve needs to fill. 2-way valves perform well for on/off control in a system, while 3-way valves can be used for on/off control, as well as for diverting or mixing media. Also, take note of whether your valve will be open or closed the most often. In order to extend the life expectancy, order a valve that is normally in that orientation and changes to the other direction when energized.
4. Actuation Method
Another consideration to be made is how the valve is to be operated. Identify if the valve will be manually hand-operated or if the valve will need to be actuated to turn off and on automatically. If the latter is chosen, decide whether the unit is going to be used with an electric, pneumatic, or hydraulic actuator.
5. Maintenance Requirements
If maintenance needs to be done regularly, ball valves are a great option as they resist clogging and are one of the simplest valve types to service. Ball valves are also available in 3-piece configurations, which consist of two end caps and a body. This allows the main body section to be easily removed for cleaning without disconnecting the end caps from the pipe, preventing the line from being shut down during maintenance.
The W.E. Anderson™ division of Dwyer Instruments, Inc. produces a broad line of competitively priced valves and valve control products, including: globe, butterfly, ball, manifold, actuators, and solenoid valves. Each valve type has a variety of options to meet specific application needs. Valve position indicators, valve positioners, and electric or manual pneumatic actuators are also available for a complete valve package. To learn more about Dwyer’s valve product line, please visit our website.
Gas valves are used in a wide variety of systems and processes in controlling liquid flow and gases. While they are so popular, it can be difficult to choose the right gas valve.
You will first need to gather some basic information before considering several factors to ensure you can find the right gas valve for your application.
In this post, we highlight eight factors to consider when choosing a gas valve – it’ll save you time and effort.
When choosing a valve material, one needs to consider the characteristics of the liquid or the type of gas. If you plan to monitor pressurized gases, metal valves are a great choice for safety purposes. In the usage of Combustible gases, Brass material are most commonly used.
Another important consideration is the valve size and type. Irrespective of the valve type, it needs to perform one or more basic functions, including:
You must also know the common valve types, including the design of standard valve types that will suit your needs. The most common valve types are:
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Properly sizing the valve is crucial too. An improperly sized valve may lead to operational issues within the valve or elsewhere in the system.
The right valve choice will match the valve’s size to achieve the expected flow through the system.
Determining the application condition of the gas valve is an important step in selecting the right valve for your application. Hence, you need to determine the pressure, temperature, and flow rate requirements.
Temperature and pressure ranges differ from valve to valve. For instance, metal valves can withstand higher temperatures and pressures than plastic valves.
This is why metal valves are recommended for pressurized gases because they tend to be stronger than plastic valves.
Along with the temperature and pressure requirements, knowing the chemical compatibility requirements is also important.
You want to ensure that the valve materials are compatible with the liquid or gases flowing through it. In this case, plastic valves tend to resist harsh or corrosive chemicals better than metal valves.
The mode of operation of the valve is another important consideration. Check whether the valve will need to be actuated (i.e. turn on and off automatically), or manually operated.
If it will be actuated, decide whether the unit is going to be used with an electric, hydraulic actuator or pneumatic.
Every component needs to be maintained. Ball valves are ideal if maintenance needs to be done regularly.
They are one of the simplest valves to maintain because they are designed to resist clogging.
Ball valves consist of two end caps and a body – a 3-piece configuration that allows the main body section to be easily removed for cleaning without disconnecting the end caps from the pipe.
Such a simple structure prevents the line from being shut down during maintenance.
What role do you need the valve to play? The 2-way valve excels when you need on/off control in a system while the 3-way valve performs well for on/off control and diverting or mixing media.
You also want to consider whether the valve will be open or closed the most often.
There are other special requirements that need to be checked if you want the valve to work as expected.
For instance, the response time and the cracking pressure required to open the valve needs to be observed.
The aforementioned factors should be considered when choosing gas valves that are the most appropriate for your application.
If you find it confusing or difficult to make a choice, please feel free to get in touch with Comet Integrated Sdn Bhd, your professional gas appliances, equipment and solenoid valve supplier.
The company is the world’s best petroleum valves supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.