SPX W Series User Manual

Maintenance Waukesha Cherry-Burrell
Page 22 95-03087 10/2012
Seat Cleaning Adjustment
Figure 15 - Adjustment zones
with scribe lines
A
B
Figure 16 - Bottom edges align
with scribe lines
A
B
Figure 17 - Location of Adjusting Nut
A. Adjusting nut, upper seat
B. Adjusting nut, lower seat
Seat lifting models are factory set. Scribe lines (Figure 15, item A)
within the acid-etched adjustment zone (Figure 15, item B) pro-
vide a visual indication of the correct factory-set adjustment.
Screw the adjusting sleeve and adjusting nut until the bottom
edges align with the scribe line (Figure 16, item A).
NOTE: Always adjust the lower seat first.
WARNING:
Do not adjust the seat lift collars with pliers,
vice-grips or adjustable jaw pliers (channel locks).
If required, adjust the seat movement. With the valve closed,
using a 3/16" diameter pin spanner or allen wrench, adjust the
movement of the seats to the factory settings or within the adjust-
ment zone (Figure 15 and Figure 16, item B). Once a successful
seat movement is established, clearly mark where the bottom
ed
ges of the adjusting sleeve and adjusting nut align, to ensure
proper resetting after disassembly.
NOTE: The seat lift stroke for the W72RSP is fixed at 0.12" upper
and 0.28" lower. Confirm the stroke length after proper assembly;
tighten both stems clockwise until they are stopped metal-to-
metal.
Lower seat
Operate the lower seat lift cycle. Observe the indicator stem
movement at the top of the valve or at the balancer on the bottom
of the valve.
To adjust the movement of the lower seat for cleaning, rotate the
adjusting sleeve in the yoke (Figure 17, item B):
W71/W73: Rotate right to increase; left to decrease.
W72RS: Rotate left to increase; right to decrease.
Table 5: Proper Movement: Lower Seat
Valve Setting
W71/W73 0.04" - 0.1" (0.060" Factory Setting)
W72RS 0.18" (1-1/2" and 2" Valves)
0.28" (2-1/2", 3" and 4" Valves)
Upper seat
Operate the upper lift cycle once. Operate three more times to
observe the outer stem movement by watching the adjusting nut
in the yoke.
To adjust the movement of the upper seat, rotate the adjusting
nut (Figure 17, item A) left to increase; right to decrease.
Table 6: P
roper Movement: Upper Seat
Valve Setting
W71/ W73 0.04" - 0.1" (.060" Factory Setting)
W72RS 0.12"

SPX W Series Specifications

General

Brand	SPX
Model	W Series
Category	Control Unit
Language	English