Australian Pipeline Valve - Installation, Operation and Maintenance Manual
6
IRON GATE & GLOBE VALVES - SL201, SL600, SL601
5. After installation it is advisable to once again flush the piping. Check carefully for visible leaks if any
and tighten stem packing and/or bonnet nuts accordingly.
6. If the leakage still persists change the bonnet gasket.
3 . 0 O P E R A T I O N
1. Check visibly for any leaks and re-tighten the joints/glands.
2. Manually operated valves are to be operated through handwheel. To open the valve, turn the
handwheel anti-clockwise. To close the valve, turn the handwheel in clockwise direction.
3. Turn the handwheel slowly initially so as to prevent undue stress on the valves due to thermal
gradient, water hammering, etc.
4. Never use too much force for either closing or opening the valve, never attempt to apply leverage with
a long lever as this could damage yoke nut.
4 . 0 G E A R O P E R A T O R S
The gear operator is lubricated with grease (2% MOS2) for life.
Only in case of failure of any components remove the upper gear casing from lower gear casing. After
inspection replace the necessary components.
1. When repairing the drive sleeve and bearing (thrust ball bearing) there should not be any clearance, i.e.
the drive should not move axially.
2. Proper installation will correct operation.
5 . 0 DIFFICULTY OPENING & CLOSING
For manual operated valves, loosen the two gland tightening nuts and the spindle should become free
(otherwise dismantle the valve bonnet to inspect).
After dismantling the valve bonnet, inspect the exposed part of the spindle for scouring marks. Smooth
out these marks with fine emery paper. Lightly lubricate the spindle and the spindle should become free
again.
Do not dismantle the upper and lower gear casing as it will disturb the whole
assembly and the deep groove ball bearings, the operator provided is properly
lubricated for long life.
