Ball valves can be used in any number of circumstances and come in lots of different shapes and sizes. The main idea behind ball valves are to control the flow of liquid. The valve is made of a spherical disc and this is the part that controls the flow. This disc will have a hole through the middle known as the port. When this port is lined up correctly liquid will be allowed to flow. When the valve is closed, flow will be stopped completely.
Of course the type of ball valve that you choose for your set will depend on what you are intending to do and the amount of flow you need to stop/allow. This may be something that you need to get advice on from the people that have these ball valves for sale.
Dont worry if you think that it may become over whelming because there are lots of places that you can seek information and advice. In fact if you look online you can look up places that sell these ball valves they usually have specifications for each of the valves that they have for sale. That way you can browse through and see what is for sale, read up about what each one can handle and then make your decision on the one that is going to best suit your project. Most of these websites also have contact pages so if you are still not sure you can email them details of what you are hoping to achieve and they will usually be happy to get back to you with product recommendations.

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