Flowserve SR Series Limitorque - Manual (Page 9)

9
Limitorque SR Series FCD LMENIM3701-00-AQ - 11/14
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8. Install the Stem Nut (pc# 5) into the Thrust Housing (pc# 37) and upper Thrust Roller Bearing (pc# 33).
9. Install the lower Thrust Roller Bearing (pc# 33) onto the Stem Nut (pc# 5).
10. Place the Gasket (pc# 32) onto the Thrust Housing (pc# 37).
11. Separately, install the O-ring (pc# 35) in the Thrust Base (pc# 31).
12. Install the Thrust Base (pc# 31) with O-ring (pc# 35) onto the Thrust Housing (pc# 37) and Stem Nut (pc# 5), using Socket Head Cap Screws
(pc# 34).
a CAUTION: Care must be taken to ensure that the O-ring (pc# 35) located in the Thrust Base (pc# 31) is not damaged during installation.
13. Mount the gearbox on the valve as detailed in Section 2.6.1 Installing a Gearbox with a Threaded Stem Nut.
2.7 Stem Cover Mounting Instructions
Refer to Figure 5.1
The gearbox is supplied with a Stem Cover Adapter (pc# 28) which accepts unthreaded Stem Covers of standard NPS pipe sizes. Optionally, the
adapter may be removed to access PF (BSPP) pipe threads, if required.
2.7.1 Installing an unthreaded Stem Cover using the supplied
Stem Cover Adapter
a CAUTION: Care must be taken to ensure the Stem Cover does not damage the O-ring during installation.
NOTE: Lubricate the O-ring (pc# 27) before installing the Stem Cover.
1. Loosen the quantity (4) set screws (pc# 30) in the Stem Cover Adapter (pc# 28).
2. Install the Stem Cover into the Stem Cover Adapter (pc# 28) and secure using the quantity (4) set screws (pc# 30).
2.7.2 Installing a threaded Stem Cover using the
optional PF (BSPP) pipe threads
a
CAUTION: Care must be taken during installation to prevent damage to the Stem Cover and Housing threads.
NOTE: Apply thread sealant to external threads on Stem Cover before installing.
1. Loosen the set screw (pc# 20) in the Housing (pc# 1).
2. Remove the Stem Cover Adapter (pc# 28) with O-ring (pc# 27) by unthreading it from the Housing (pc# 1).
3. Remove and discard the O-ring (pc# 26).
4. Install the threaded Stem Cover into the Housing (pc# 1) and tighten.