Maintenance - Emerson KTM series Installation And Operation Manual

KTM Jacketed ball valves
InstallatIon and operatIon manual

9 MainTenance

the following instructions will contribute to long life service of the valve.
Periodical checks and maintenance are required to keep valves in good working condition.
Parts to be periodically checked and maintenance items are shown in below Figures 8 to 9.
cauTion
If leakage is observed through the gland packing, tighten the gland bolts slowly and evenly until
the leakage stops. This must be accomplished without affecting the torque. Do not over-tighten the
packing gland bolts, since this will increase the torque required to operate the valve.
This procedure should be performed every 3,000 operation cycles or every six months of service. When
gland packing is expected to be loosened due to the heat cycle, retighten the screws every two months
of service or every 1,000 operational cycles.
FIgURe 8
Jb11 dN 15 - dN 80
Jb12 dN 15 - dN 80
Jb21 dN 80 - dN 100
Jb22 dN 80 - dN 100
FIgURe 9
Jb11 dN 100 - dN 200
Jb12 dN 100 - dN 200
Jb21 dN 150 - dN 250
Jb22 dN 150 - dN 250
gland bolt
snap ring
gland flange
shaft bearing
gland bolt
gland
stopper
shaft
gland packing
stopper
gland flange
shaft bearing
gland
gland packing
shaft
Full bore
6