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PEIIRP1200-12 alarm devices must automatically restrict flow or alert the transfer operator when the tank is no more than 90 percent full. This approach reflects the more conserva- tive application of the rules. 7.1 Automatic Shutoff Devices. 7.1.1 General. Automatic shutoff devices, sometimes called flappers or flapper valves, arc an integral part of the drop tube assembly installed within the tank fill riser. They are designed to initially restrict and subsequently completely shut off flow when product has reached predetermined levels during a delivery. Automatic shutoff valves need to be properly positioned and operate freely to control flow and prevent tank overfills. 7.1,2 Purpose. The purpose of this inspection is to verify the automatic shutoff valve is installed properly, operates as designed and is set to com- pletely shut oft flow when the tank is no more than 95 percent full. 7.1.3 Description of Inspection. After a pre- liminary inspection of the automatic shutoff instal- lation, the drop tube is removed from the tank. The automatic shutoff is checked for proper operation, and its placement is measured to verify that it is properly located to completely shut off flow when the tank is no more than 95 percent full. 7.1.4 Preparation. Refer to the tank manufac- turer's calibration chart for the capacity in gal- lons, the diameter and the volume of product with respect to product level. If the automatic shutoff device has a float that extends from the drop tube in the shutoff (closed) position, verify the proper orientation of the float mechanism. The float mechanism should be orient- ed away from any obstructions (ball float, submers- ible turbine pump (STP), tank wait, tank gauge probe, etc.) If the movement of the float mecha- nism is restricted, it will not function as designed. Use this procedure in conjunction with the manu- facturer's installation and maintenance instructions. 7.1.5 Inspection Equipment. Test equipment shall include: • tools for removal of the drop tube; • tape measure; • tools for inspection of the automatic shutoff. 0 pei.org 7.1.6 Inspection Procedure. 1. Remove the drop tube from the tank. 2. Visually inspect the automatic shutoff valve and float mechanism for any damage and remove any debris or foreign objects. 3. Manually move the float mechanism to ensure it moves freely. 4. With the float mechanism in the shutoff (closed) position, visually inspect the drop tube and verify that the shutoff valve is released and will move into the product flow path. 5. If possible, verify that the bypass valve in the drop tube is open and free of blockage. 6. If problems with the shutoff valve are found and defective components need repair or replace- ment, notify the appropriate person. 7. Using the automatic shutoff device manufac- turer's suggested procedure, examine the drop tube and shutoff valve to determine if product flow will be completely shut off at 95 percent of tank capacity. Make any adjustments necessary to ensure that flow will be completely shut off when the tank is no more than 95 percent full. FIGURE 7-1. Check the drop tube and flapper for dam- age. Make sure that the flapper moves freely and shuts off flow when extended. S. After inspection of the automatic shutoff device, reinstall the drop tube. 7.1.7 Pass/Pail Criteria. If the automatic shut- off device functions as designed and complete shutoff of product flow is able to occur when the