Pfeiffer 14t Series Скачать руководство пользователя страница 3

Pfeiffer

Chemie-Armaturenbau GmbH

Page 3 of 4

3.2

Pre-assembling the valve body

Place the valve body ( 1 ) on a surface at a suitable working height.

Screw the stud bolts ( 23 ) into the valve body ( 1 ).

Use a suitable mandrel to press the bearing bushing ( 13a ) as far
as it will go into the shaft bore of the valve body ( 1 ) on the stuffing
box side.
Insert the spacer ( 14a ).

Use a suitable mandrel to press the bearing bushing ( 13b ) far as it
will go into the shaft bore of the valve body ( 1 ) on the bonnet side
Insert the spacer ( 14b).

3.3

Butterfly disc and shaft

The butterfly disc ( 3 ) and shaft ( 2 ) form a unit which is easily
assembled together using the straight pins ( 6 ). This unit can be
taken apart for assembling it into the valve.

Note:

It is important that both these components are used
together.

3.4

Assembling the butterfly disc, shaft and valve body

Place the butterfly disc ( 3 ) with the sealing side facing
downwards on a surface at a suitable working height.

Place the valve body ( 1 ) with the facing side upwards carefully
over the butterfly disc, ensuring that the disc is located neatly in the
port of the body.

Caution: 

Take particular care to

 

make sure that facing of

the valve body and the butterfly disc do not get damaged.

Note:

 Make sure that the bearing holes on the butterfly

disc ( 3 ) are aligned with the shaft bore of the valve
body ( 1 ).
Observe the eccentricity of the butterfly disc.

Push the shaft ( 2 ) through the shaft bores of the valve body ( 1 )
and through the bearing holes of the butterfly disc ( 3 ).
Insert the straight pins ( 6 ) into the butterfly disc and shaft.

3.5

Assembling the butterfly valve

Slide the guide washer ( 7 ) on the bonnet side over the shaft until it
touches the ready installed spacer ( 14b ).

Fasten the shaft head ( 8 ) to the end of the shaft with the screw
( 9 ).

Push the ring ( 21 ) onto the bonnet ( 18 ).
Insert the washer ( 20 ) into the recess in the bonnet ( 18 ) intended
for it.

Place the ready-assembled bonnet into the shaft bore of the valve
body and align it using the screws ( 19 ).
Tighten the screws evenly in a criss-cross pattern.

Slide the thrust washer ( 17 ) on the stuffing box side over the free
end of the shaft at the corresponding place in the valve body.

Slide the rings of the PTFE packing ( 22 ) one by one over the shaft
into the shaft bore of the body and press them in using an
installation sleeve.

Note: 

Make sure that the packing rings are inserted with

their divisions 

not

 aligned with one another.

Place the stuffing box ( 15 ) neatly over the shaft. Insert the stud
bolts and align them using the nuts ( 16 ) and washers.
Tighten the nuts evenly in a criss-cross pattern.

3.6

Final assembly of the butterfly disc

Turn the valve body by 180° so that the facing of the butterfly disc
faces upwards.

Insert the ring ( 11 ) into the groove of the ready-assembled
butterfly disc ( 3 ).

Caution:

Pay particular attention to cleanliness.

Push the seat ring ( 4 ) onto the fastening ring ( 5 ).

Caution:

Refer to the exploded view diagram in Fig. 3 for location
of the seat ring ( 4 ).

Place this ready-mounted fastening ring on the butterfly disc and
adjust its position using the screws ( 12 ).

Caution:

Do not damage the facings.

Fasten the fastening ring by tightening the screws evenly and in a
criss-cross pattern.

Insert the feather key ( 10 ) into the groove of the shaft ( 2 ).

Carefully bring the butterfly disc into the closed position.

3.7

Note concerning the mounting of actuators

Caution: 

Triple eccentric butterfly valves must always

close in the clockwise direction!

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