Flowserve HV 205 - Manual (Page 18)

18
Maintenance
– continued –
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 pages 4, 6 and 19
1. First disconnect all connections of the actuating cylinder . 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 unscrew the 6 hexagon-head cap
screws of the body and remove the body and the associated actuating cylinder
together. Remove gasket .
4. Undo the 12 socket-head cap screws and take the valve head from the mounting
flange. For this purpose you can screw three hexagon-head cap screws M 12 into
the three through threads of the seat flange. Note that these screws are not scope of
the supply. Remove gasket
.
To remove the valve head proceed as follows:
Drawing see page 19
1. Screw valve plug and spring plate together in order to secure the preloaded
compression spring . For this purpose screw a hexagon-head cap screw M 12
together with its associated washer (to ISO 7089-12) into the stem of the valve
plug
. Note that neither the screw nor the washer are scope of the supply.
2. Then unscrew the six hexagon-head cap screws with the locking washers out
of the stay bolt . Take the valve plug together with the spring plate and the
compression spring out of the seat flange .
3. Then remove the retaining ring and the washer .
4. Unscrew the four socket-head cap screws , take out the washer and remove the
valve plug seal .
Carefully clean all removed and dismantled parts.
X D
D
22
8
23
6
25 3
26
25
1 2
4 25 3
26 7
28 27
29 30
31
Warning
Any use of naked flames is expressly forbidden!
Before perfomring any service work inside the tank make sure that the
tank is sufficiently ventilated and all gases have been completely vented.
The rules concerning MAC (= maximum allowable concentration) values
at place of work must be strictly applied!