Flowserve HV 215 - Manual (Page 36)

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Hydraulic loading & unloading system HV 215
Servicing
Observe the following servicing instructions whenever carrying out:
n
Visual examinations as part of the main inspection
n Repair work due to leaks or other malfunctions
The bottom valves HWV 205/ - DN 80 and HWV 25/ - DN 80 require maintenance and servicing. The operating
device BV 0 is maintenance free.
We recommend removing the bottom valves HWV 205/ - DN 80 and HWV 25/ - DN 80 and checking them for
wear and damage when performing visual inspections.
Do not re-use parts subject to wear, such as gaskets and seals. Worn or damaged parts must be replaced after ascer-
taining and eliminating the cause of the damage. Use only genuine GESTRA parts.
GESTRA supplies the following seal kits:
. Stock code 049387
n  Valve plug seal PTFE
n 2 Gaskets
∅ 25 68
2. Stock code 049395
n  Valve plug seal CR
n 2 Gaskets
∅ 25 68
3. Stock code 049563
n  Piston seal
§
n  Seal ring a
n 2 O-rings ()
n  Gasket !
n  Gasket &
Modifications to the design may only be made if the manufacturer‘s written permission is obtained.
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Replacing valve plug seal
The valve head can be removed directly inside the tank. This option is highly recommended since in this case the
bottom valves, the connecting lines and the hydraulic system do not require any additional preparation.
If, however, the valve head can only be removed from the outside, please proceed as follows:
See drawings on page 4, page 6 and page 38
. First disconnect all connections of the actuating cylinder
B. A small amount of oil might escape.
Collect the oil and dispose of it correctly.
2. If possible separate the manifold from the body.
3. To remove the body and the actuating cylinder
B unscrew the six hexagon-head cap screws b of the body
and remove the body and the associated actuating cylinder together. Remove gasket 8.
4. Undo the 2 socket-head cap screws c and take the valve head from the mounting flange. For this purpose
you can screw two hexagon-head cap screws M 0 into the two through threads of the seat flange.
Note that these screws are not scope of the supply.