Operation Waukesha Cherry-Burrell
®
Brand W70 Series Mix Proof Valves
Page 20 95-03087 10/2023
Valve Operating
Conditions
See Figure 10 on page 17 for port and corresponding chambers.
Valve Open
The valve is open when Chamber 1 is pressurized and Chambers
3 and 2 are vented. See Figure 12.
Valve Closed
The valve is closed when Chambers 3, 1, and 2 are vented. The
large spring closes the valve to the fail safe position. See Figure
13.
Valve Closed, Upper Seat Lifted
For cleaning the upper seat on seat lifting models only. Chamber
2 is pressurized, and Chambers 3 and 1 are vented. See Figure
14.
Figure 12 - Valve Open
Figure 13 - Valve Closed
Figure 14 - Valve Closed, Upper Seat Lifted
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