3-54. THREE-WAY PLUG VALVES.
General. The 4 three-way plug valves are in the filter section. One is located above each flow controller valve in
the filtered water line, and one between each filter pump and filter in the coagulated water line. The two effluent plug
valves (5, fig. 2-23) located in the filter water lines are three-way, three-port valves. They direct the flow of water to the
storage tanks or recirculate the water through the wet tank for refiltering, depending on how the valve handles are
positioned. The two influent plug valves (9, fig. 2-24) located in the coagulated water line are three-way, two-port
valves. They direct the flow of water to the influent section of the filters or to the wash ring of the filter housing,
depending on the position of the valve handles.
Drycleaning solvent, P-D-680, used to clean parts is potentially dangerous to personnel and property.
Wear chemical resistant gloves when using solvents, and avoid repeated or prolonged skin contact.
Do not use near open flame or excessive heat. Flash point of solvent is 100 degrees F to 138
degrees F (38 degrees C to 59 degrees C).
Cleaning. Clean the plug valve with drycleaning solvent.
Inspection. Inspect the plug valve for cracks and damaged threads. Check the operation of the lever to see if it
will move freely and turn the plug inside the valve body.
3-55. ADJUSTABLE FLOW CONTROLLER VALVES.
General. The two flow controller valves (6, fig. 2-23) are located in the effluent or filtered water lines. These
water lines are painted green. The function of the flow controller valves is to regulate the flow of water through the filters.
There is a knob on each flow controller valve with a dial marked 0 to 30 gpm. The flow can be regulated by setting the
pointer on the knob to point to the desired flow.
3-56. CHEMICAL SLURRY FEEDER DRIVE CHAIN GUARD.
General. The chain guard is located on the chemical slurry feeder tank and is designed to protect the slip clutch,
chain and tightener.
Removal. Remove four screws (2, fig. 3-35) and lockwashers (1) and remove guard (3).
Inspection. Inspect the guard for broken mounting brackets, dents, cracks, and rust.