Instruction Manual
D100423X012
V500 Valve
July 2017
19
Figure 10. Detail of Valve Plug for Pin Insertion
A3309‐1
BENCH
SLASH MARK
ON SPLINED
END OF SHAFT
PINS GO IN FROM
THIS END (LARGER HOLE)
Note
Before proceeding, inspect the valve plug position once again to ensure the correct orientation as described in step 6. If the valve
plug is not properly installed, it will not rotate properly and will not shutoff in service.
8. Hold the thrust washer(s) (key 12) between the valve plug (key 2) and the bearing installed next to the packing as
shown in figures 11 and 13. Then slide the valve shaft (key 3) from the packing box into the valve body through the
thrust washer(s) and plug. If the shaft material is S17400, use two 0.7938 mm (1/32 inch) 17‐7 PH thrust washers. If
the shaft material is S20910, use one 1.587 mm (1/16 inch) alloy 6 thrust washer.
9. Secure the valve plug in the correct open position. Inspect the splined end of the valve shaft and locate the slash
mark on the splined end. Rotate the valve shaft until the slash mark is vertical and facing out from the center of the
shaft in the same direction as the valve plug seating surface. See figure 10.
Note
When the valve shaft is correctly positioned, the slash mark on the splined end will be parallel with the plug shutoff surface. See
figure 10.
10. Look into the valve body and find the larger pin hole on one side of the valve plug hub. Find the smaller hole on the
opposite side of the hub. These holes should line up with the hole through the shaft (key 3).
Note
If the holes in the valve plug hub do not line up with the hole in the shaft, check the slash mark on the splined end of the shaft.
Make sure the shaft and plug are properly oriented.
CAUTION
For NPS 1 through 2, use only N10276 expansion and taper pins (keys 9 and 10) with VTC (ceramic) valve plug. With any
other pin material, there is danger of the pins expanding and cracking the plug as temperature rises. For that reason, the
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