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' flow should be restricted to approximately 1-1/2 to 10. Remove the AVO, replace and tighten the im- 3 gallons per minute. Close the dispenser nozzle pact valve plug. and the pressure reading should return to the 11. Enable and operate the submersible pump and range of 8 to 10 psi on diaphragm models, 17 to 22 dispense two to five gallons of product into the ' psi on piston models. (If full line pressure of ap- suitable container to remove any air that may proximately 26 to 30 psi is achieved while selected have been introduced by removing the equip- rate is present through the ball valve,it indicates ment. Check for leakage with the pump run- the leak detector is not reacting properly to that ning before closing the dispenser housing. leak rate causing restricted flow.) While checking for leakage 7. Mark "yes" column if restricted flow through 111" around impact valve plug and the nozzle is observed when the simulated leak dispenser housing, DO NOT dis- ' is present or pense product through nozzle. Mark"no"column if restricted flow is not expe- Pressure may be decreased to rienced through nozzle when the simulated the point that adequate testing leak is present. of subject areas would not occur. 8. The above steps may be repeated using differ- .® If the leak detector and/or pump- , ent simulated leak rates. Using a measured ing system operation differs sig- container and the conversion chart above,indi- nificantly from that described cation of the leak rate that subject leak detector above during the evaluation,see is reacting to in subject system under current Leak Detector Manual, #5191, conditions is possible. However, to best deter- and/or Petroleum Products Ser- mine that information, we recommend use of vice Manual, #5190, for possible the field test apparatus (FTA) and associated causes and solutions. procedure. See Option B, report RJ-20. If the leak detector does not op- AVO MATERIAL LIST erate, record the date code and Parts List: Majority of parts to be purchased from replace subject leak detector im- Swagelok-Whitey-Nupro-Snotrik Dealers or equiva- ' mediately.Test the replacement lent leak detector for proper opera- 9M Cat.s Description Reference tion after installation. Prior t0 Gaua1 23K Marshall 0-60 psi,2-12"dial 6 ' reaching the conclusion that the 1/4*NPT leak detector is not a function- Valves ing unit, evaluate its operation 1 SS-OVM2 1/8 Swaglok Needle Valve 8 removed from the pumping s r min s P P g Y j 1 b-400-2-4 Swaglok tube fitting male elbow 9 tem. Equipment exists to all= 1 B1t 1/4"tee FNPT 7 this evaluation and may be uti- 1 QC4-S 400 Swagelok Quick Connect 1/4'NPT 3 lizedprovidedspecificationscov- 1 QC4-B-4pm Swagelok Quick Connect 1/4" 4 ered in our recommended evalu- 1 B-2S 1/e"Reducing BushElboing 2 1 BARB-4 Reduci Bushin 1/4'to3/8' 1 ' ation procedures are met. 1 B-4RB-2 1/4"x 1/8"Bushing Hose V. REMOVING THE AVO 1 S7r4ta4pm4-48 1/4 Swagelok Hose 5 Optional Accessories ' 9. Shut off the submersible pump.Bleed the pres- 1 500101 Graduated Cylinder 10 sure to zero by discharging the remaining pres- surized product into a suitable container by ® DISPENSER ' opening the valve on the AVO. s Disable power to submersible 5 s pump before attempting to dis- 9 ' connect the AVO. Failure to do so may cause an accidental dis- charge of pressurized gasoline 3 P 4 a that may result in 2' to y personal in- jury, fire or explosion. Tag or ✓. TEST PORT IN SAFETY VALVE lock out submersible pump breaker to avoid pump being ac- FROM SUBMERSIBLE PUMP ' eidentally turned on. 5 •Use of parts 1,2&4 depends on position and size of the shear valve.