ADCA
VAL
S
TEAM
ADCA
We reserve the right to change the design and material of this product without notice.
IMI PV25G.20 E 04.16
Replacing standard plug:
Separate the actuator from the valve body as described before. In reference to fig.4
proceed as follow:
1. Loosen the threaded bushing (8) and screw off the lock nuts (10).
2. Remove the bonnet (2) from the valve body (1)
3. Take off the complete plug stem (6) from the bonnet (2).
4. Apply silicon oil on the new complete plug stem and introduce it into the bonnet (3).
5. Replace the body gasket (11) after cleaning its housing face carefully.
6. Re-assemble all the items in reverse order ensuring the alignment of spindles and plug-seat consequently.
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Always change the old packing gland when the plug stem replacing is occurred.
Replacing packings:
Take off the complete plug stem as described on paragraph “REPLACING STANDARD PLUG”
,
then, in reference
to the Fig.5, 6 and 7 proceed as follow:
1. Screw off the threaded bushing (3).
2. Remove spring (4) and packing (graphite type G packing do not have spring).
3. Clean the packing chamber accurately and apply silicon oil to the individual parts of the new packing and the
plug stem.
4. Insert the plug stem in the valve bonnet (see note).
5. Lodge the new packing and its spring following the right sequence.
6. Replace the body gasket (11) (see fig. 4)
after cleaning its housing face carefully.
7. Re-assemble all the items ensuring the alignment of spindles and plug-seat consequently.
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The valve stem should be correctly fitted within the bonnet before replacing the packing in order to avoid v-rings
damage.
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Care should be taken when handling the gaskets. Some gaskets are stainless steel reinforced and can easily
cut.
