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ZINC PHOSPHATE FILTER CAKE PRESS PACIFIC PRESS PAC 470 SERIES CLOSING THE PRESS o Push the follower plate tight against all the other plates. o Flip down the hydraulic cylinder into place. o Turn the control lever to the"left"position to start the hydraulic pump pumping. o The follower will close slowly. Once the follower has pushed all the filter plates against the head,the hydraulic pump will start cycling slower until it comes to a stop. FILTRATION CYCLE o Open all valves,except the`Slowdown Air Line Valve." o Start the Wilden Diaphragm Pump. o Start the air pressure and slowly increase it to 25 psi. Once the diaphragm pump strokes have slowed to only a few times per minute, it is necessary to increase pump pressure. Increase the air pressure to 50 psi. The filter cycle is complete when a pressure of 100 psi is reached and the air diaphragm pump strokes less than four times per minute. AIR BLOWDOWN o Close all valves to the press. o Open the lower left "Air Blowdown Manifest Valve." o Slowly open the`Slowdown Air Line Valve"to at least 30-40 psi. o The air is to be left on for approximately 30 minutes to aid in drying the filter cake. CAKE DISCHARGE o Turn off the"Blowdown"Air Line Valve." o Turn the control lever to the"right"position to start the hydraulic pump pumping. The follower will slowly open and allow access to the inside of the plates. o Flip up the hydraulic cylinder. o Pull apart each filter plate, one at a time. o Use a plastic spatula to separate the filter cake from the filter plate. o Filter cake will fall through the chute and into a cardboard bin. STOWI-0006 Wastewater Filter Cake and Zinc Phosphate Filter Cake filter press disposal