Isolation valves cover several types and designs. Generally you consider ball valves, butterfly valves, gate valves and check valves as isolation valves. These can again be divided into subgroups. E.g gate valves can be divided into, to mention some: parallel gate valves, cone gate valves and spade valves.
Every type of isolation valve has its advantages and disadvantages. If you are in doubt of which valve to choose for your application, please let ProMetal help you find the right valve for your needs.
Isolation valves are often called on/off valves, but it is the same case. You distinguish between on/off valves depending on their construction and function. An isolation valve does not only have the opportunity to isolate for the medium, but can both be turned on and off, meaning that it can be turned off so it does not isolate the medium.
Some isolation valves are known as 3-way valves and looks like a T or a Y. These are especially suitable in pipe- and/or pump systems, or for a mix of flow. A 2-way isolation valve is on the other side just a valve placed directly on the pipe. This gives you the opportunity to regulate if the medium flows through the valve or not.
Various types of isolation valves
Ball valves are used in different applications within e.g. oil/gas and district heating, and they are available in different designs and with different features.
The butterfly valve excel as being the isolation valve that has the lightest weight. Furthermore it is easy to install and fill less in the pipeline. They are often used as isolation and are delivered with or without gear. The disadvantage of a butterfly valve is that it is not good at handling very high pressures.
Gate valves are designed for isolation and are either completely closed or completely open. They too are available in different designs – one of these is the parallel slide gate valve, primarily used for steam.
Check valves are used for the oil and gas industry as well as the process industry. There are many different designs of check valves, each with their own advantages and disadvantages.
As you can see, there are several opportunities in check valves, and you can read more about each of the valves here at our website. If you are still in doubt, or want further information about advantages and disadvantages of each type of valve, please feel free to contact ProMetal.
When we know your application, pressure, medium and temperatures, we can serve you in the best and fastest manner, and guide you to the right valve type for your needs.