Flowserve 50165 Nordstrom Figure - Manual (Page 27)

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Nordstrom Figure 50165 and 50169 Dynamic Balance Iron Plug Valve FCD NVENIM2006-00 – 09/05
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4. Loosen the adjustment screw 1 ⁄
8
turn. If possible, the valve should be in the full open position for final
plug adjustment.
5. Inject sealant (see pages 24 & 25.) You should receive a higher pressure reading on the gauge. If
you still do not get a pressure increase on the gauge, repeat Steps 3 and 4. If a second attempt at
plug adjustment is unsuccessful, it is likely there is a damaged area on the plug or body-seating
surface. Refer to Cause 3.
6. Replace the Plug Adjusting Screw cover.
Cause 3: Damaged plug
Solution: A simple way to determine if the plug is damaged is to rotate the plug 180 degrees to place
the upstream seat into the downstream position. The following procedure is a temporary solution to the
seat leakage problem and the valve should be identified for remanufacture or replacement.
For a Wrench operated Valve:
a) Loosen the Plug Adjusting Screw 1/2 turn.
b) With the valve in the full open or full closed position, remove the Retaining Ring and the Stop Collar.
c) Rotate the valve Stem 180 degrees.
d) Replace the Stop Collar and the Retaining Ring.
e) Adjust the Plug as described in Valve Sealant Leakage, Cause 2, Steps 3 through 6.
f) Inject sealant – see pages 24 and 25.
For a Gear operated Valve:
a) Loosen the Plug Adjusting Screw 1/2 turn.
b) With the valve in the full open position, remove the Gear Housing Bolting.
c) Turn the Gearing Handwheel clockwise. The Gear Housing will move counterclockwise (be careful
not to damage the Gear Housing Gasket while rotating the gearing). Turn the Handwheel until the
Gear Housing bolt holes align with the next hole in the Gear Flange.
d) Replace two of the housing bolts to hold the Gearing firm.
e) Turn the Handwheel counterclockwise until the Gear Segment contacts the valve stop.
f) Repeat steps c) and d) until the Gear Housing has been rotated 180 degrees.
g) Replace the Gear Housing bolting.
h) Inject sealant – see pages 24 and 25.
i) Adjust the Plug as described in Valve Seat Leakage; Cause 2 Steps 3 through 6.