Waukesha Cherry-Burrell
®
Brand W70 Series Mix Proof Valves Maintenance
10/2023 95-03087 Page 29
Tri Ring Seat Replacement
1. Remove the Tri Ring seat by carefully cutting or using an O-
ring tool or pick to pull the seat out of the groove. Do not
scratch or nick the metal seating surface.
Maintenance Video 8: Upper stem Tri Ring removal
2. Clean the Tri Ring groove after removing the seat.
3. Lubricate the new Tri Ring (Figure 25, item A) with hot soapy
water (never use lubricants).
4. Place the stem through a 1-1/8 inch (30 mm) hole bored
through a board, or secure it with a vise with copper or
aluminum jaws.
5. Start the Tri Ring as shown in Figure 25.
Maintenance Video 9: Upper stem Tri Ring replacement
6. Using the installation tool, part number 102797+ (Figure 25,
item B), press the Tri Ring into the plug at locations A, B, C,
and D (Figure 26). If this tool is not available, a dull, flat tool
can be used. DO NOT use a knife or any other sharp item
that will tear or cut the Tri Ring.
7. To finish installation, press small sections of the seal,
alternating from side to side (A-B-C-D), avoiding large loops
of seal.
8. When properly installed, the Tri Ring seat lip will protrude
slightly from the seat edge as shown in Figure 25.
Maintenance Video 10: Lower stem O-ring and Tri Ring
replacement (W71/W73)
Figure 25 - Installing New Tri Ring Seat
Figure 26 - Pressing Tri Ring Into
Plug
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