3-48. CONTROL VALVE REPAIR (MODELS WPES-10, WPES-20 AND WPES-30) - continued
Thoroughly clean multimedia filter control valve metal parts using detergent and water.
Allow parts to dry.
Inspect all valve parts, cartridge assembly, cap assembly, all threaded parts and screws for damage and/or corrosion.
Replace damaged items. Clean corroded items.
Replace packing, lockwashers, diaphragms and damaged components.
Position keeper (17), rubber washer 16), washer ( 15) and lockwasher ( 14) on shaft ( 19).
It will be necessary to hold shaft ( 18) with a screwdriver, in the screwdriver slot at top of
shaft, to tighten nuts (7 and 13).
Install nut (13).
Lubricate packing (19) and position it in diaphragm housing (12).
Carefully position housing (12) on shaft (18).
Position diaphragm keeper (11), diaphragm (10) washer (9), and lockwasher (8) on shaft (18).
Install nut (7).
Install packing (5) and valve seat (4) in control valve (20) and tighten valve seat with gland removal tool.
Position packing (6) on diaphragm housing (12) and install diaphragm housing (with attached parts) in
control valve (20).
There are six cartridges in the multimedia filter control valve. All are assembled the
same. One is shown.
3-274 Change 1