2 PIECE BODY BALL VALVES - FS660 SERIES
Australian Pipeline Valve - Installation, Operation and Maintenance Manual
10
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
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.
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.
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.
The most common area for leakage is around the stem packing, this is usually due to wear and can
normally be stopped by adjusting the packing. This procedure is performed by turning gland bolts or nut
(9) 1/2 turn at a time until leakage stops. Once leakage stops, continue tightening gland plate nuts an
additional 1/2 turn. If leakage cannot be halted by adjusting packing, repacking of the valve is indicated.
(Refer to field repair).
Do not attempt to replacing packing or replace stem while the valve is in service!
(The stem is blowout proof and can only be removed by disassembling the valve).
Only graphite packing is to be used for firesafe service, PTFE is not firesafe. A FS660
valve is firesafe only when fitted with graphite packing and graphite or spiral
wound graphite filled body gasket. Check the full part number on the label to
ensure the valve is specified as firesafe. If there is no firesafe logo on the label the
valve is not firesafe. If the part number indicates PTFE packing or body gasket the
valve is not firesafe.
4.1 GLAND PACKING
In case of slight leakage from the gland, gland packing nut(s) can be lightly tightened up without
effecting torque.
