SPX APV DELTA SV1B, Operating Manual

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Modulating-Butterfly Valve with Top Control TC 8630
DELTA SV1B and SVS1FB
Operating manual : rev. 0
DELTA SV1B / SVS1FB-UK0.qxp / 09.2007
UK
11. Service Instructions
12
11.1.2 Replacement of seals
- Take FGN1 flange seals (3) out of the groove and replace them.
- Turn valve disc (5) in the SV seal (4) in open position.
- Remove the bearing bushes (7.3) .
- By slight pressing, the SV seal (4) is deformed in its longitudinal
axis so that it can be pulled off via the short bearing spindle.
- Pull the SV seal (4) off the actuating spindle.
- Clean the valve disc (5) .
- Grease the cross bores of the new seal ring according to chapter 9
and insert the long actuating spindle of the valve disc (5) .
- Turn the valve disc (5) in the SV seal (4) into open position.
- With slight hand pressure, the seal ring is deformed in its
longitudinal axis so that it can be pushed on via the short bearing
spindle.
11.1.3 Installation of inner parts
The valve disc (5) is equipped with a raised ring on the disc bolt
(fig. 1) .
- Place the bearing bushes (7.3) on the spindle of the disc.
The bearing bushes must be flush with the housing half (fig. 2) .
- Insert valve disc (5) in open position, with SV seal (4) and bearing
bushes (7.3) into one housing half (1) .
- Assemble the housing halves (1) , tighten with screws (7.2 and 8.2)
alternately crosswise. During the installation of the housing halves,
the raised ring presses into the plastic surface of the bearing bush
and secures the bearing bush against longitudinal motion.
Attention! During tightening of the screws (7.2 and 8.2)
the valve disc (3) must be in op en position.
Damage to the valve disc seal is possible
in case of assembly in closed position.
The bearing bushes must no protrude from
the housing flanges (fig. 3) .
11.1.4 Assembly of the valve
- Proceed in reverse order to the steps described in chapters
11.1 and 11.1.1.
raised ring
on disc bolts
bearing bush
fig. 1
fig. 2
fig. 3
bearing bush
wrong assembly