Top 8 Things to Look For When Selecting Excess Flow Valves

by:Nanfang     2020-05-03
When you search for excess flow valves, there are some very important things to look for. You want to make sure you find out exactly what you're getting before you place an order. Not all vendors carry what you need. Depending on the industry, you may need particular features. Therefore you want to consider the top 10 things to look for to help you sort out exactly what you need. Type of flow valve. You want to make sure that you purchase the right type of excess flow valve. This means looking at how the flow is controlled within the valve. Typical loading, unloading operation valves use a disc type valve. Line /flange size. You will need to take a look at the body size based upon the flow required for the material being handled. Of course the greater the body, line size, the more the fluid can flow through the valve. 2 inch to 4 inch are common line sizes for loading operations. Capacity. For a given body size, the flow rates can vary based on the spring used. Material. The material of the valve needs to be considered as well. The material needs to be compatible with the fluid being handled. Corrosion or erosion of the body or working parts would possibly prevent valve operation or cause a possible failure of the valve body. Are the key parts of the valve stainless steel or other materials to insure long life? Quality. The quality of valves can vary from vendor to vendor. To ensure you get the highest quality possible, you want to buy from a trusted vendor - one that has a reputation of providing high quality products to top companies around the world. Pressure rating. Be sure the valve is rated for the pressure it will see in the piping system. High quality valves are hydrostatically tested to 750PSI. The valve flange rating is also a consideration with 150#, 300#, 400# common flange sizes.. Lead time. Find out how long it will take to get the excess flow valve you need in the size and capacity needed. Some vendors can meet your fast turnaround requirements! Flow stamp. Excess flow valves control flow in only one direction. Is the flow direction clearly stamped on the valve to avoid installation errors? A simple error in installation would cause the valve to not function in the event of a critical line rupture, etc.
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