2-52. 3-WAY BALL VALVE (BACKWASH) MAINTENANCE.
This task consists of
b. Installation c. Installation
General Mechanics Tool Kit (Appendix B. Section III, Item 4)
Tape, Anti-seize (Appendix C, Section II, Item 30)
O-ring - 0200A100-1105A-210
Gasket (2) - 103873D05
Lockwasher (4) - MS35338-139
ROWPU shutdown (TM 10-61-24-10).
Power shutdown (power source manual)
ROWPU piping drained (TM 10-61-240-10).
General Safety Instructions
ROWPU piping and equipment can contain extremely high pressure during and after operation. If
this pressure is not relieved before performing maintenance, serious injury or death may result.
Be sure to open all drains and vents before performing maintenance.
a. Remove nut (14), flat washer (15), and handle (131 from 3-way valve (24).
b. Remove two nuts (21), screws (17), clamp halves (16), and gasket (18).
c. Remove two nuts (2), screws (19), clamp halves (1), and gasket (23).
d. Remove two nuts (6), screws (3), clamp halves (4), and gasket (5).
e. Remove four screws (11), lockwashers (10), and flat washers (9) from bracket (8).
f. Disconnect electrical cable (W52) from control box (J8).
g. Remove 3-way valve (24) and attached parts from control panel (12).
h. Place 3-way valve (24) In vice and remove pipe section (20), check valve (22) and adapters (7 and 25).