12.4. Replacement Of Seals - SPX FLOW APV DELTA SV1 Instruction Manual

APV
DELTA SV1 - DE - 7.qxp 16.09.2010
projecting ring
fig. 1 on the
disc bolt
fig. 2
bearing bush
bearing bush
fig. 3
wrong assembly
bearing bush
17
12. Service Instructions
12.4. Replacement of seals
1. Turn the disc (5) in the seal ring (3) into open position.
2. Remove bearings (2).
3. By a slight pressing, the seal ring (3) is deformed in its longitudinal
axis, and, thus, can be pulled off via the short bearing spindle.
4. Pull the seal ring (3) off the actuating spindle.
5. Clean the valve disc (5).
6. Grease the holes of the new seal ring (3) according to chapter 9
and insert the long actuating spindle of the valve disc (5).
7. Turn the disc (5) in the seal ring (3) into open position.
8. By slight pressure the seal ring (3) is deformed in its longitudinal
axis, and, thus, can be pushed on via the short bearing spindle.
12.5. Installation of seals and bearings
The current design of the valve disc has a projected ring
on the disc bolt (fig. 1).
The new valve disc can also be installed in old housings.
1. Place bearings (2) on the spindle of the disc.
The bearing bushes must be flush with the housing flange (fig. 2).
2. Insert the disc (5) in open position with seal ring (3) and
bearings (2) into one housing half (4).
3. Assemble the housing halves (4) with the screws (6)
alternately crosswise.
During the assembly of the housing halves, the projecting ring
presses into the plastic surface of the bearing bush and secures
the bearing bush against longitudinal movement.
Attention! Tightening of the screws (6), the valve disc (5)
must be in open position.
Damage of valve disc seal during assembly in
closed position is possible.
Bearings must not project the housing flange
(fig. 3).
UK
Butterfly Valve
DELTA SV1
Instruction Manual: UK - rev. 8