Inlet check valve is used to stop the reverse flow of fuel in the tank after the refueling is done so that the spit back is prevented out the fill. The working of Inlet check valve can be explained by the presence of fuel going through the fill pipe when the refueling is done in the tank. The inlet check valve also measures the fuel flow rate in the tank and handle the incoming fuel. These inlet check valves are also known as non-return valves or one-way valves. They are used to allow the flow of fuel in one direction and block the flow in opposite direction. Inlet check minimizes the flow of fuel in the tank and restricts the entry of gases in the tank. The restriction of gases helps to improve the efficiency of a tank by protecting it from environmental conditions. The positive outcome of the Inlet check valve is that no human intervention is needed to operate the valve. Also, it prevents the fuel from getting contaminated and damage of tank from extreme pressure is avoided. ...