COMPLIANCE INFO_1985-1998 - Laserfiche WebLink

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THE RED JACKET 3 -STEP 'LEAK TEST The Red Jacket leak detector is a Pres- sure sensing, diaphragm operated valve designed to indicate a leak in the piping between the leak detector and dispenser. When the submerged pump is turned on, a controlled amount of product (three gallons per hour) is metered through the leak detector into the pip- ing system. If a leak is present which POSITION 1 LESS THAN 1 PSI FULL PRESSURE APPROX. 25 PSI FROM PUMP ,cam APPR 1 PSI LE OR lESS THE "TRIP" OR RELAXED POSITION. Under normal operating conditions, it is assumed that the lines are filled with gasoline. When the system pres- sure is less than 1 psi, the diaphragm and poppet are in their "down" or "tripped" position. The position of the valve "poppet' is such as to allow approximately 11/2 to 3 gpm flow into the delivery line, through a bypass opening in the leak detector valve poppet, when the submersible pump starts. Since the system is full, pres- sure builds rapidly and the poppet moves to the leak sensing position assuming there is no leak present. LEAK SENSING POSITION. As the pressure builds to approximately 8 to 10 psi (rapidly), the diaphragm has moved the "poppet' to such a posi- equals or exceeds this amount, as much product escapes from the Sys tem as is metered in through the leak detector. Under this condition pressure cannot build up in the piping system. When a nozzle is opened a poppet in the leak detector moves to a position which restricts the flow to approximate- ly 11/2-3 GPM. This is the indication to POSITION 2 S TO 10 PSI FULL PRESSURE APPROX. 25 PSI FROM PUMP METERING e To 10 PSI y�i/ tion as to almost stop the flow into the piping through the leak detector valve poppet. In this position, all the flow must then travel around the me- tering pin which limits it to approxi- mately 3 gph rate. If a simultaneous loss from the system equals or ex- ceeds this amount, the line pressure will not build beyond this point and the valve will remain in the leak sens- ing position with the main floes blocked. If there is an attempt to dis- pense while the valve is in this posi- tion, the line pressure will drop, the diaphragm will respond, and the pop- pet will return to position 1 where 11/2 to 3 gpm will flow to the dispensers. Leaks smaller than 3 gph will be indi- cated by the Leak Detector taking longer than approximately two sec- n i the operator that a leak is present. If there are no leaks, pressure rapid- ly builds in the system forcing the leak detector to open to the full -flow posi- tion. In a system with no leaks it takes approximately two seconds for a com- plete test. No further line testing takes place until the line pressure drops below 1 PSL MARLEY 1 THE MARLEY PUMP COMPANY RED JACKET PUMPS onds to open completely. If there is no leakage in the system, the small flow around the metering pin in- creases the line pressure to 10 psi in approximately two seconds at which point the diaphragm will snap the poppet to position 3. This all takes place in less time than it takes to re- set the dispenser, walk to the car, re- move the gas tank cap, insert and open the nozzle. NON -LEAK POSITION. This position allows full flow. The poppet will re- main in this position as long as the system pressure remains above 1 psi. At less than 1 psi the poppet will re- turn to position 1 and the next time the pump is activated, the Leak De- tector will perform a line test. 5600 Fo.ridge Dr.. Mission. KS 66202 (913) 722 1465 Form No. 5170 Rev. 2/87 In Canada - Marley Fluid S, -stems. 126 East Dr.. Brampton. Ontario L6T 1C2 International Sales - Missia ,i. KS Telex 716875045 MARLY UW