Australian Pipeline Valve - Installation, Operation and Maintenance Manual
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FLOATING BALL VALVES - SLFSBV02 & SLBV02 SERIES
3 . 0 O P E R A T I O N
3.1 MANUAL OPERATION
Valve adjustment is by clockwise turning of stem. Lever operated and gear operated valves have a
position indicator to indicate open or closed (see figure 1 & 2). Ball Valves must not be used for throttling.
Do not leave part open, or seats will be damaged. Valve must be full open or full closed.
FIG 1.
FIG 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 M A I N T E N A N C E
Packing leakage could result in personal injury. Valve packing is tightened prior to
shipping but may require adjustment to meet specific service conditions.
If a valve does not fully close, damage to the seat and body will result due to the
venturi effect resulting in high pressure erosion. Flush or remove the valve at next
opportunity.
Valves should be periodically checked at least once every 3 months, but depending on service, criticality
and frequency of use, more regular checking may be required.
A good program of inspection and maintenance cannot be overstressed. It is recommended that the valve
be periodically and at least partially stroked/function tested to ensure the valve functions and prevent
seizure/sticking of any mating surfaces. Duration depends on service, criticality etc. However it also must
be factored in that if there are impurities or particulates in the line each operation could reduce seat life
proportionately. Periodic inspection of critical leak-path areas such as body/bonnet joint, end
connections, seating surfaces, and around the stem packing should be a requirement.
