Flowserve HV 215 - Manual (Page 34)

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Bottom valves HWV 205/1 - DN 80/ HWV 215/1 - DN 80
Maintenance
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
B
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 20 Nm
b
When necessary,
during main inspection
at the latest (every 4 yrs.)
Check and, if necessary, re-tighten the six hexagon-head
cap screws of the body and the two hexagon nuts that fix
the control unit to the body with a torque of 20 Nm.
Check
smoothness of operation
of ball valve shaft When necessary,
during main inspection
at the latest (every 4 yrs.)
Check smooth operationg of switching shaft.
If the switching shaft does not move smoothly apply
a commercially available lubricant.
Replace
piston seal
(
When necessary,
every 8 years at the latest
Replace piston seal
as described in section “Maintenance”.
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