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The Red Jacket leak-detector is a pressure which equals or exceeds this amount, as operator that the leak is present. sensing,diaphragm operated valve designed much product escapes from the system as is If there are no leaks,pressure rapidly builds to indicate a leak in the piping between the metered in through the leak detector. Under in the system forcing the leak detector to leak detector and dispenser. this condition pressure cannot build up in the open to the full-flowposition. lnasystemwith When the submerged pump is turned on,a piping system. When a nozzle is opened, a no leaks it takes approximately two seconds controlled amount of product (three gallons poppet in the leak detector moves to a posi- for the complete test. No further line testing perhour)is metered through the leakdetector tion which restricts the flow to approximately takes place until the line pressure drops into the piping system. If a leak is present 1-1/2-3 GPM. This is the indication to the below 1 PSI. POSITION 1 POSITION 2 POSITION 0 e TO 10 PSI LESS THAN 1 PSI FULL PRESSURE FULL PRESSURE FULL PRESSURE APPROX.25 PSI APPROX.25 PSI APPROX.25 PSI FROM PUMP FROM PUMP FROM PUMP POPPET a IF � PI r//xIN/ j / PI ALL ALL PRESSL UJE E APOROLESS SI BTO 10 PSI EOUA 1.THE "TRIP" OR RELAXED POSITION. poppet to such a position asto almost stop approximately two seconds to open Under normal operating conditions, it is the flow into the piping through the leak completely. It there is no leakage in the assumed that the lines are filled with gaso- detector valve poppet. In this position,all system,the small flow around the meter- line. Whenthe system pressure is less than the flow must travel around the metering ing pin increases the line pressure to 10 1 psi,the diaphragm and poppet are intheir pin which limits it to approximately 3 gph psi in approximatelytwo seconds atwhich "down"or"tripped"position.The position of rate. If a simultaneous loss from the sys- point the diaphragm will snap the poppet the valve "poppet" is such as to allow ap- tem equals or exceeds this amount, the to position 3. This all takes place in less proximately 1-1/2 to 3 gpm flow into the line pressure will not build beyond this time than it takes to reset the dispenser, delivery line,through a bypass opening in point and the valve will remain in the leak walk to the car,remove the gas tank cap, the leak detector valve poppet, when the sensing positionwiththe main flow blocked. insert and open the nozzle. submersible pump starts. Sincethesystem Ifthereisan attempt to dispense while the 3.NON-LEAK POSITION This position al- is full, pressure builds up rapidly and the valve is in position,the line pressure will lows full flow. The poppet will remain in poppet moves to the leak sensing position drop,the diaphragm will respond,and the this position as long as the system pres- assuming there is no leak present. poppet will return to position 1 where 1-1/ sure remains above 1 psi. At less than 1 2.LEAK SENSING POSITION. As the pres- 2 to 3 gpm will flow to the dispensers. psi the poppet will return to position 1 and sure builds to approximately 8 to 10 psi Leaks smaller than 3 gpm will be indicated the next time the pump is activated, the (rapidly), the diaphragm has moved the by the Leak Detector taking longer than Leak Detector will perform a line test. ! << , Per the above process, this product is designed and sold to detect leaks of approximately 3GPH or greater only. For leaks of less than approximately 3GPH, please consult with your Marley Pump Company representative. MARLEY COMPANY 5171°10/92 THEP PrvnRanorP aAtone