Flowserve WG Series Limitorque - Manual (Page 7)

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Limitorque WG Series Worm Gear Operator FCD LMENIM2101-02 – 1/15
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2.4 General Mounting Instructions
a CAUTION: To avoid the potential for disengaging the worm gear segment, ensure that the pointer cap pointer is
oriented to the mid-point of the 90º valve travel. Full stroke rotation of the quadrant should not move the pointer
past the corresponding Open or Close ID marks on the housing cover.
The mounting instructions for the WG series worm gearboxes are outlined below. The WG-00 through WG-35 gearboxes
are designed with a bottom entry splined adapter. The WG-04 through WG-12 gearboxes are designed with a top entry
splined adapter. A separate set of instructions for each design is provided. See Section 2.4.1 for the WG-00 through WG-35
and Section 2.4.2 for the WG-04 through WG-12.
2.4.1 WG-00 through WG-35
1. Place the valve disk in the full closed position.
Note: If the Splined Adapter is already installed in the operator, go to step 6.
2. Remove the Pointer Cap (see Section 4 for removal instructions).
3. Turn the gearbox upside down so that the bottom of the housing is accessible.
4. Remove the Retaining Ring, and install the Splined Adapter.
Note: The notch in the Worm Gear at the Closed position must be aligned with the
keyway in the Splined Adapter.
5. Reinstall the Retaining Ring.
6. Place the gearbox in the upright position so that the top of the gearbox is accessible.
7. Mount the operator on the valve and bolt securely.
8. Rotate the input shaft to align the keyway of the Splined Adapter with the keyway of the
Valve Shaft and install the key.
9. Confirm that the gearbox Stop Screws are properly set for valve disk travel in both the Open and Close
directions of travel. See Section 2.6.
10. Reinstall the Pointer Cap.