Flowserve HV 205 - Manual (Page 15)

15
Checking
– continued –
Bottom Valves HWV 205/1 - DN 80
Connecting Lines
Type of maintenance Time interval Activity
Check valve plug seal
When necessary,
during main
inspection at the latest
(every 4 yrs.)
Check valve head for leaks. If a leak is
detected replace valve plug seal as
described in section "Maintenance".
Replace valve plug seal
Main inspection
(every 4 yrs.)
Replace valve plug seal as described in
section "Maintenance".
Check actuating cylinder
When necessary,
during main
inspection at the latest
(every 4 yrs.)
Check connection between actuating
cylinder and body. If you detect an oil
leak replace the PTFE seal and the
O-ring as described in section
"Maintenance".
Check torque
of 50 Nm
When necessary,
during main
inspection at the latest
(every 4 yrs.)
Check the torques of the four hexagon-
head cap screws of the actuating cylinder
and, if necessary, retighten the screws to
a torque of 50 Nm.
Check torque
of 120 Nm
When necessary,
during main
inspection at the latest
(every 4 yrs.)
Check the torques of the six hexagon-
head cap screws of the body and, if
necessary, retighten the screws to a
torque of 120 Nm.
Replace piston seal
When necessary,
every 8
years at the latest
Replace piston seal as described in
section "Maintenance".
Type of maintenance Time interval Activity
Check tightness
When necessary,
during main
inspection at the
latest
(every 4 yrs.)
Make sure that no oil can escape
at connecting joints and T-type screwed
unions.
If necessary, retighten respective
connections.
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