4
Keystone
ComPoSeAL butteRfLy vALveS, wAfeR StyLe
InstallatIon and MaIntenance InstructIons
3 mAintenAnCe
the Keystone CompoSeal is designed to require
a minimum of maintenance.
Warning
Depressurize and, if necessary in case of
dangerous fluids, drain the line and flush with
appropriate cleaning fluid before starting any
maintenance. Failure to do so may cause serious
personal injury and/or equipment damage.
Before disassembling the valve, ensure the valve
has been decontaminated correctly from any
harmful gasses or liquids and that it is within a
safe temperature range for handling. Personnel
making any adjustments to the valves should
utilize suitable equipment. All required personal
protection means should be worn. Only personnel
trained in all aspects of manual and mechanical
handling techniques must carry out handling of
the valves.
3.1 routine Maintenance
Routine maintenance or lubrication is not
required other than periodic inspection to
ensure satisfactory operation and sealing.
3.2 reMoving tHe valve
1. turn the disc to nearly closed position.
(the disc is in line with the parallel flats).
2. Loosen all flange bolts and remove the
bolts.
3. Spread the flanges with adequate tooling,
and remove the valve.
3.3 valve disasseMbly
disassembly is not possible. the body halves
are fixed by a one way connection.
Parts identification
1
body
2
disc stem
3
Seat
4
o-ring
ComPoSeAL wAfeR
Parallel flats
flange locating holes
mounting holes
top view
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