Australian Pipeline Valve - Installation, Operation and Maintenance Manual
5
IRON GATE & GLOBE VALVES - SL201, SL600, SL601
1 . 0 I N S T A L L A T I O N
1.1 INSTALLATION POSITIONS
Gate valves are usually bi-directional, and therefore may be installed in either direction. In some cases,
gate valves may be unidirectional, in which case the direction of flow will be indicated on the valve body.
Globe valves are uni-directional, install in direction shown by arrow on body.
Gate & Globe valves should be installed with the stem in a vertical up position on horizontal lines. Never
install with the stem below the horizontal axis, as complete drainage is not possible and solids may
accumulate in the valve bonnet, which will greatly affect the valve operation and service life. If valves
are to be installed in vertical lines, please specify at time of order as this is non standard.
1.2 PREPARATION FOR INSTALLATION
• Remove protective end caps or plugs and inspect valve ends for damage to flange faces.
• Thoroughly clean adjacent piping system to remove any foreign material that could cause damage to
seating surfaces during valve operation.
• Verify that the space available for installation is adequate to allow the valve to be installed and to be
operated.
2 . 0 H A N D L I N G
1. Take care in handling valves especially the sealing faces.
2. Make sure that piping and equipment is clean of dust, rust and pipeline scale. Clean all adjoining pipe
and fittings. Remove end protector covers from the valves immediately prior to installation. Blow
compressed air inside the valves to remove residual dust, dirt, etc., from inside the valves as this could
hamper the valves functioning and could also damage the seats.
3. Make joints tight but do not overstress them. This is very important when your tightening gland packing
nuts. Always tighten in a diagonal pattern, gradually increasing torque settings.
4. Install valves in the connecting piping so that the arrow mark on the valve body coincides with the
flow direction in the pipe. (Gate valves can be bi-directional).
Piping should be properly aligned and supported to reduce mechanical loading on
the end connections.
Note
Ensure sufficient clearance for the stem in the full open position. Inadequate
clearance for valves may add mechanical loading to the valve ends. Sufficient
clearance should be allowed for threaded end valves to be ‘swung’ during
installation.
