Flowserve 50165 Nordstrom Figure - Manual (Page 29)

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Nordstrom Figure 50165 and 50169 Dynamic Balance Iron Plug Valve FCD NVENIM2006-00 – 09/05
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7. Remove the liquid gasket from the Gland contact area of the Body.
8. Clean debris from the top of the Packing and from the Gland bolt holes.
9. Fill the relief area of the Gland with valve sealant.
10. Apply liquid gasket to the Gland-to-Body mating surface.
11. Replace the Gland.
12. Apply an anti-seize compound to the Gland Cap Screws and install. Use the bolting torque guide-
lines as referenced in the Technical Data: Procedure for Tightening Cap Screws.
13. Apply lithium base grease to the bottom of the Weatherseal and replace.
14. Replace the Stop Collar and Retaining Ring.
Cause 5: Gearing problems
Solution: Check to see if the valve gearing is causing operational problems.
1. Remove the Indicator.
2. Completely remove the Gearing.
3. Remove the Gear Segment Key.
4. Replace the Gearing less the Segment Key.
5. Rotate the Handwheel to operate the Gearing. If the Gearing is difficult to operate, the problem is in
the Gearing. If the gearing is easy to operate, the problem is within the valve.
6. Inspect the Gear Segment and the Worm Gear for excessive wear or damage or lack of lubrication.
7. Rotate the Worm Shaft to determine if the Bearings are binding.
8. Replace any parts as necessary and ensure the Gearing operates properly before reassembling to
the valve.
Problem: Blockage of sealant system
Cause 1: Sealant groove blockage
Solution: Some sealant can harden in the valve sealant system if not properly maintained. Hardened
sealant can prevent or reduce the flow of sealant injected into a valve. To clear the valve sealant
system of hardened sealant, inject VXX Valve Purge.
1. Inject VXX Valve Purge liberally into the valve using sealant injection equipment. If possible, the
valve should be operated several times during application.
2. Allow the VXX Valve Purge to remain in the valve for an extended period of time with periodic valve
operation.
3. Repeat Steps 1 and 2.
4. Inject an excess amount of the appropriate valve sealant into the valve.
5. If valve operation is improved by this procedure but the valve is still not operating properly, repeti-
tion of this procedure may be required.
6. Under conditions of severe sealant deterioration, VXX Valve Purge may not be capable of dislodging
sealant residues and valve disassembly and physical cleaning may be required.