HIGH PERFORMANCE BUTTERFLY VALVES - MODEL SLHBF & SLHBFFS
Australian Pipeline Valve - Installation, Operation and Maintenance Manual
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3.1 MANUAL OPERATION
Valve adjustment is performed by clockwise turning of the stem. Lever operated and gear operated
valves have a position indicator to indicate open or closed (see Diagram 2). Normal isolation butterfly
valves are not designed to be used for throttling. Do not leave part open, or seats will be damaged.
Valves must be full open or full closed. (See 3.0 above for control valve applications).
DIAGRAM 2
3.2 LOCK DEVICE
Where provided (optional) the valve has a locking lug that allows valve to be locked in full open or full
closed position.
4 . 0 P R E - I N S T A L L A T I O N
Before installation of the valve to the line, it is recommended to inspect the valves as below.
4.1 INSPECTING VALVE & ACCESSORIES
- Ensure that there has been no damage to the valve during transportation.
- Remove the protective end covers just before installation and clean internals and face with an air gun
or with a clean dust cloth.
- Check the tightness of all the bolts and nuts.
4.2 INSPECTING PIPELINE
- Remove foreign materials such as a rust, welding slag, etc., which remain in the pipeline.
- Ensure flanges and gasket surface are clean.
When the fluid is flowing through the line, any foreign materials can damage the
disc, seat and inner body causing leakage past the seat.
