Australian Pipeline Valve - Installation, Operation and Maintenance Manual
11
IRON GATE & GLOBE VALVES - SL201, SL600, SL601
Note, the stem must slide freely through the stuffing box without applying excessive force. Finally, install
the bonnet gasket making sure it is not damaged. The gasket should be replaced if there is any question
as to its performance (refer 11.0).
Raise the bonnet, making sure the stem is in the half open position, then connect disc to stem. Always fit
a new bonnet gasket then lower the bonnet on to the valve body making sure that the disc fits exactly
into body guides and the bonnet is properly seated. Align holes and tighten bonnet nuts taking care that
excessive force is not used, to avoid damaging the gasket. Do not over tighten bolts. Hydrostatically test
the valve to ensure that there is no leakage. Refer to Diagram 2, Appendix A for bolt tightening sequence.
