Flowserve 50165 Nordstrom Figure - Manual (Page 30)

Nordstrom Figure 50165 and 50169 Dynamic Balance Iron Plug Valve FCD NVENIM2006-00 – 09/05
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Cause 2: Sealant Fitting blockage
Solution: In the event no sealant is being injected into the valve even though the sealant equipment is
pressurized, the Sealant Fitting may be blocked and should be replaced.
a Caution: The following procedures should be performed with extreme caution. Make sure the
sealant fitting is pointed away from your body before attempting. Heavy leather gloves should
be worn during these procedures.
1. Check for sealant pressure behind the Sealant Fitting by pressing the center button of the fitting
with a small punch or screwdriver. If a small amount of fresh sealant is released through the Sealant
Fitting center button, the fitting is accepting sealant and operating properly.
If the center button of the Sealant Fitting cannot be depressed the Sealant Fitting is faulty or clogged
with debris and/or hardened sealant and should be cleaned or replaced. Proceed to Step 2.
If a steady stream of sealant or line fluid is ejected from the Sealant Fitting, the Check Valve is not
operating properly and should be flushed or replaced. See Blockage of Sealant System, Cause 3.
Before replacing a faulty Sealant Fitting, remove the valve from line pressure.
2. First, test for trapped pressure below the Sealant Fitting by carefully unscrewing it while attempting
to move the fitting back and forth. If pressure is present, continue to move the fitting back and forth
until the pressure is relieved. Do not remove the fitting until all pressure is relieved.
3. Once the fitting is removed, attach the sealant injection equipment to the fitting and inject sealant.
If sealant does not flow from the fitting, the fitting is faulty and must be replaced. If sealant can be
pumped through the fitting, the problem may be with the Check Valve or valve sealant-grooving
system.
4. Replace the Sealant Fitting, if necessary.
Cause 3: Check Valve blockage
Solution: Check Valve blockage may be the result of debris or hardened sealant not allowing the Check
Valve ball to move off of its seat. Remove the sealant fitting as described in Cause 2, Step 2. Inject
sealant and/or VXX Valve Purge before continuing with this procedure. Flush or replace the Check Valve
if the solution to Sealant System Blockage, Cause 1 and 2 are unsuccessful.
Before replacing a faulty Check Valve, the valve must be removed from the line.
1. Remove the Sealant Fitting as described in Cause 2.
2. Using a .188" square tool or an Allen wrench, remove the Check Valve.
3. Once the Check Valve has been removed, clean the removal area of all debris and check for
thread damage. Failure to do so may allow contaminates to enter the valve sealant system and
damage the sealing surface of the Plug and/or Body.
4. Lubricate the new Check Valve threads with light machine oil.
5. Install a new Check Valve.
6. Replace the Sealant Fitting.
7. Inject sealant into the valve.