4 MAINTENANCE AND REPAIR
4-6
Therma-Flow
®
PLUS
IOM 09900002
Revision C 08/15/21
© 2021, Encon Safety Products, Inc.
4.5.1 Eyewash Ball Valve
To remove and replace the eyewash ball valve:
1. Switch off the electrical power supply.
2. Relieve fluid and pressure from the system as described in “4.3 Relieving
Fluid and Pressure from the System for Plumbing Repairs” on page 4-3.
3. Remove the black seal strips from eyewash covers and save them for
reinstallation.
4. Remove push plate hex head bolt.
5. Remove the push plate.
6. Remove eyewash covers and save them for reinstallation.
7. Remove the extension grommet and valve extension sleeve and unscrew the
valve extension from valve stem and valve stop. Save for reinstallation.
Discard, if replacing with Valve Extension Kit (P/N 01052515 or 01052544).
8. Remove the eyewash ball valve by doing the following:
a. Use a pipe wrench to hold the eyewash supply pipe.
b. Use another pipe wrench to unscrew and remove the eyewash ball valve.
9. Install the new eyewash ball valve in reverse order of removal. Use pipe sealant.
Pipe sealant is recommended for metal to metal thread (ball valve to pipe).
10. Test the valve operation by assuring the valve push plate is at 12 o'clock when
the valve is off, and when the valve is completely open, the valve push plate is
at 3 o’clock.
11. Test to ensure the valve opens and closes properly and does not leak before
putting Therma-Flow
®
Plus into service.
To repair the eyewash ball valve.
1. Remove ball valve by completing step 1 to step 8 in the procedure “To
Remove and Replace the Eyewash Ball Valve” on page 4-5.
2. Remove the retainer from the body by rotating it counterclockwise.
3. Push the ball out of the body with your finger (the valve must be in the closed
position to remove the ball). Inspect the ball for excessive wear or damage. If the
ball is scared, it is recommended that the whole valve be replaced. Clean and
set aside a good ball for reuse.
4. Remove all seats and seals (to remove the stem packing, you may have to cut it
with a knife).
