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Reccrnniended Practices for the Testing and Verification of$011,Overfill,Irk Ntmiian and Secondary CcnWnraent Equipment at UST facilities frank is no more than 95 percent full, the aulomatic 7.2.3 Inspection Equipment,. Test equipment sbuteff device passes the inspection. shall inclade: U the automatic shutoff' device dues not function equipment to romovc tht;vent restriction devi€e; as designed or complete hbutoff of product flow . tape aitr_asure, is unable, io occur und] dtic tank is mom than 9 percent full, [lie automatic shutoff device fails the 7.2.E Description of Inspection. The ball float inspection. valve assembly is rornoved from the tank, inspect- ed rot proper operation and measured to en uai re,that 7.2 Ball Float Valves. Tho POI Overfill, release, the ball float assembly is the proper d1ni arsian to DL[cction and Release, Prevention Equipment 'Testing restrict flow into the tank whcn it is no more than Committee recommends that ball floats be mmovcd from 90 percent cull. UM as overfill prevention devices and ancglicr method or overfill prevention he installed. 7.ZS Reparaticm. Refer to the manufacturer's Lank chart for [lie capacity in gallons, the diameter 7.2.1 General. Ball float valves are designed and the vdi me of product with respect try product to restrict product flow when product in the tank level. x chcs a ucrtain level by restricting vapor flow from the tank ullage.When vapor flour is restricted, Use this test pi-ouedure in curijunction with the man- pressu-e tsuilds in ncr-talc ullage,slowing the Flow ufkAurcr's installalion and maintenance instrcc- of product into fte tank_ liens. To opi�rata prcperly, the ball float valve must be Visually verify that all fiofk-top fittings are lrak- properly installed, positioned at the correct height free and vapor-tight before, strong the te-q proce- inside the tank and compatible with UST configu- dam. If any fittings air- loose, the- ball float valve M6011. will not restrict flow. 7.2.2 Purpose. The purpose of this inspe Linn is Inspect the drop tube to ensure that it does not have to verify that tho hall float valve is installed prop- an overfill valve, erly,operates as designed,and is set to restrict flow+ when the tank is no mare than 90 percent full_ • - Inspection Procedure. JL Remove the loll float valve assembly From the 1Mnk. 2.Visually inspect the ball float and cage.Remove ,V any dCWN or forcigrt Objcxts. +f ti -hEN6ry;'v4.. - - - - -- - - - - ... •� }''y�*ter, FIGURE 7-2. l3a;t i"r'oc'if as,3cmNy show ng the bail in the: FMURE 7-3. To avoid damage when removing or rein- open position. The ball will afloat and cover the vapor stalling the txall ftat, use an extractor toot recomrrmand- Wh if the product rises above the tevel of the fie. cd by the hall Root manufacturer: pei.org 40