The ball valve is a common valve in many piping systems used to interrupt, start or redirect the flow of liquids or gases.
The valve has a ball inside it that has a hole in its core. The position of the ball allows either an on or off state. On state creates a transfer of product and a closed off position stops the flow of product.
The EPA does have some regulations regarding valves in the oil industry. It is important to regularly check for guidance documents to stay in compliance.
A ball valve has two states. It is either open or closed.