The primary function of an air valve is to prevent the surge from occurring as it can pose risks of total flow stoppage and worst, line breakage. This is why it is imperative that it is strategically located and you have chosen the appropriate size. Regardless of the size, such valves have basically the same parts. It is vital that you are knowledgeable as well on the different parts of it as there may be instances that you need to replace a component of the valve. Below are some of the pieces that you need to familiarize yourself into.
First is the restrictor disc. This is an important component of a surge-suppression valve as it provides synchronized exhaust. This will control secondary water hammer or surges when column separation takes place. In addition, it has ball and butterfly isolation valves. These two will make it easier to maintain the mechanisms. Outlet hood that has screen is extremely helpful in putting off debris and other contaminants from going into the valves. Also, in order to keep flood water so that the purity of the water can be ensured, there has to be an inflow preventer on the valve’s outlet.
There are also ports in the air valve. Basically, there are two that are positioned on the left and right which are asymmetrical. These ports are where the outgoing and the returning water pass through separately. A valve that is designed to suppress surges has regulated-exhaust device. This device has flanged discs that, as its name suggests, regulates the closing of the valve. Various studies have proven that such mechanism can significantly lessen the pressure water hammer when the exhausting air is limited.
It is important to read a review on the manufacturers of such valves that offer different parts. This is because if one component is substandard, it will affect the whole operation. A small difference can make a big differenceso you must guarantee the quality of the spare parts that you will purchase. Read independent reviews of the manufacturers so that you can make sure that the analysis is not influenced by them. Consider their expertise, tenure and the reputation that they have established. Take into account the weak points of their products and weigh if you deem it fit for purchasing.
Parts of the air valves slightly vary depending on the type of the air valve. Nevertheless, regardless of what component you need to buy or replace, it must be certified by NSF and must conform to AWWA or the American Water Works Association’s rules. The body may differ according to country you are in but these two are widely accepted globally. It is a regulating body that set standards on water supply practices. Each part has specifications that you must also be familiar with. They differ with outlet and inlet sizes, orifice sizes, CWP PSI and model number. Each component has different functions to perform and everything is equally important. The valve will not function if one would be missing. Proper maintenance is also essential in keeping the parts in good condition.