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THE RED JACKET 3-STEP I EA TEST The lied Jacket leak detector is a pres- ing system. If a leak is present wh#ch GPM. This is the indication to the oper- suresensing,diaphragm operated valve equals or exceeds this amount, as ator that a leak is present. designed to indicate a leak in the piping much product escapes from the system If there are no leaks, pressure rapid- between the leak detector and dis- as is metered in through the leak detec- ly builds in the system forcing the leak penser, tor. Under this condition pressure can- detector to open to the full-flow posi- When the submerged pump is turned not build up in the piping system. When tion, In a system with no leaks it takes on, a controlled amount of product a nozzle is opened a poppet in the leak only two seconds for a complete test. (three gallons per hour) is metered detector moves to a position which No further line testing takes place until through the leak detector into the pip- restricts the flow to approximately 3 the line pressure drops below 1 PSI. 3 TO 4 PSI ABOVE NEAR SLIGHTLY ABOVE ATMOSPHERIC PRESSURE ATMOSPHERIC PRESSURE ATMOSPHERIC PRESSURE LESS THAN 1 PSI 8 TO 10 PSI 25 PSI ABOVE POPPET PUMP ?, PSI 1 PSI �— �— METERING. \ \PIN \\\ \\\ t LESS THAN.+, � 8 TO 10 PSI AL EQUALt,PRESSURE 1 PSI 1. THE "TRIP" OR RELAXED POSI- to 10 PSI (Instantly), the diaphragm pensers. Leaks smaller than 3 GPH TION. Under normal operating con- has moved the "poppet" to such a will be indicated by the Leak Detec- ditions, it is assumed that the lines position as to almost stop the flow for taking longer than two seconds are filled with gasoline which is es- into the piping through the leak to open completely. If there is no sentially non-compressible. When detector valve poppet. In this posi- leakage in the system, the small the system pressure is less than 1 tion, all the flow must then travel flow around the metering pin in- PSI, the diaphragm and poppet are around the metering pin which lim- creases the line pressure to 10 PSI in their "down" or "tripped'' posi- its it to approximately 3 GPH rate. in approximately two seconds at tion.The position of the valve "pop- If a simultaneous loss from the sys- which point the diaphragm will snap pet" is such as to allow approxi- tem equals or exceeds this amount, the poppet to position 3. This ail mately 3 GPM flow into the delivery the line pressure will not build be- takes place in less time than it takes line, through a bypass opening in yond this point and the valve will the dealer to reset the dispenser, the leak detector valve poppet, remain in the leak sensing position walk to the car, remove the gas tank when the submersible pump starts. with the main flow blocked. If there cap, insert and open the nozzle. Since the system is full, pressure is an attempt to dispense while the 3. NON-LEAK POSITION.This position builds instantly and the poppet valve is in this position, the line allows full flow. The poppet will re- moves to the leak sensing position, pressure will drop, the diaphragm main in this position as long as the assuming there is no leak present. will respond, and the poppet will system pressure remains above 1 2. LEAK SENSING POSITION. As the return to position 1 where approxi- PSI. At less than 1 PSI the '`poppet'' pressure builds to approximately 8 mately 3 GPM will flow to the dis- will return to position 1. d RE0JACKET R' PUMP" A Division of Wylain, Inc. Form No. 5170 P.O. Box 3888, Davenport, Iowa 52808