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�� PEI/RP1200-17 <br /> Use this test procedure in conjunction with the as designed, flow restriction occurs when the tank <br /> manufacturer's installation and maintenance is no more than 90 percent full, and the tank-top <br /> instructions. fittings are vapor-tight. <br /> Visually verify that all tank-top fittings are leak- If any of the following configurations exist, the <br /> free and vapor-tight before starting the test proce- overfill prevention system fails the inspection: <br /> dure. If any fittings are loose, the ball float valve . ball float valves are installed in storage systems <br /> will not restrict flow. <br /> that are equipped with suction pumps and air <br /> Inspect the drop tube to ensure that it does not have eliminators; <br /> an automatic shut off device. • the ball is cracked or damaged; <br /> 7.2.6 Inspection Procedure. • the ball float cannot be removed; <br /> 1.Remove the ball float valve assembly from the • the orifice is not at the top of the assembly, or is <br /> tank. clogged with debris or corroded, which would <br /> 2. Visually inspect the ball float and cage. Remove prevent proper air flow after activation; <br /> any debris or foreign objects. • ball float valves are installed with coaxial Stage <br /> 3. Check the ball for holes and cracks. It should I vapor recovery; <br /> move freely in the cage. Check for corrosion • ball float valves are used on tanks equipped with <br /> that affects the operation of the ball float. remote-fill pipes and gauge openings without <br /> 4. Check the vent orifice in the vent-restriction the use of"trap door" devices; or <br /> pipe. It must be open and located near the top of ball float valves are installed in storage systems <br /> the tank. that also are equipped with automatic shutoff <br /> devices and the ball float valve is set to restrict <br /> 5. Use the ball float valve manufacturer's flow before the tank is 95 percent full. <br /> installation procedure to determine if vapor flow <br /> will be restricted when the tank is no more than If the ball float valve does not function as designed, 3 <br /> 90 percent full. flow restriction does not occur until the tank is <br /> 6. After inspection of the ball float valve assembly, more than 90 percent full, or the tank-top fittings <br /> reinstall it following the manufacturer's installa- are not vapor-tight, the ball float valve fails the <br /> tion instructions. inspection. <br /> 7.2.7 Pass/Fall Criteria. The ball float valve NOTE: When permanently removing a ball <br /> passes the inspection if the ball float valve functions float, ensure that the entire assembly is <br /> removed so as not to interfere with other <br /> methods of overfill prevention. <br /> 4 7.3 Overfill Alarms. <br /> 7.3.1. General. Overfill alarms provide an audi- <br /> ble and/or visible warning to the fuel delivery <br /> driver if the product level in the UST reaches the <br /> 90 percent level during a delivery. They are often <br /> an integral part of the automatic tank gauge (ATG) 3 <br /> system. An overfill alarm does not stop or restrict <br /> product flow. <br /> `r <br /> '`� 7.3.2 Purpose. The purpose of this inspection <br /> z +r • ., y is to verify that the overfill alarm is operating cor- <br /> rectly and is set to provide a warning when the tank <br /> FIGURE 7-3. To avoid damage when removing or rein- is no more than 90 percent full. <br /> stalling the ball float, use an extractor tool recommend- <br /> ed by the ball float manufacturer. <br /> ® pei.org <br />