Flowserve 50165 Nordstrom Figure - Manual (Page 32)

Nordstrom Figure 50165 and 50169 Dynamic Balance Iron Plug Valve FCD NVENIM2006-00 – 09/05
2
13. Insert the Cover Bolts, but do not screw the bolts all the way down.
14. Tighten the Cover Bolts, using the appropriate torque values from Table 1 and the procedure for
Tightening Cap Screws and Nuts.
15. Remove the Plug Adjusting Screw and apply a thread-locking compound.
16. Insert the Plug Adjustment Screw into the Cover until the screw is “even” with the inside of the
Cover.
17. Adjust the Plug as follows:
• Tighten the Plug Adjustment Screw to a “snug” condition.
• Loosen the Plug Adjustment Screw 1 ⁄
16
" to 1 ⁄
8
" of radial movement.
18. Inject sealant.
Cause 2: Non-compressible fluid trapped in port of plug while in the closed position.
Solution: Allow pressure to self-relieve over a period of time. If Cover leakage continues, follow
procedures as described in Cause 3.
Cause 3: Loose bolting.
Solution: Tighten the cover bolting to the torque and order as listed in the section Tightening Cap
Screws and Nuts.
1. Loosen the Plug Adjustment Screw approximately 1/2 turn.
2. Tighten the Cover cap screws to the torque shown in Table I, Torque Values for Pressure Retaining
Bolting.
3. Tighten the Plug Adjustment Screw until the Plug is tight in the Body, and then loosen the Adjust-
ment Screw approximately 1/4 turn. The valve should be in the full open position if possible.
4. Inject Sealant.
5. If leakage continues, then it is probable that the Cover Gasket or O-rings on the Ball Seat have been
damaged. These can be replaced only when the valve is out of service. Procedures for replacing the
Gasket and O-rings are described in Cover Leakage Cause 1.