APV DELTA DA3+ SLD, Operating Manual

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19
UK
DELTA DA3SLD-UK0.qxp / 12.2007
Double Seat Mixproof Valve with Seat Lift Detection
DELTA DA3+SLD
Operating Manual: Rev. 0
2) 3)
1)
4)
11.1 Assembly of the lower shaft seal pos. 37, 36
For a simple disassembly and assembly of the lower shaft seal
a universal tool
(ref.-No. 000 51-13-100/17) can be used.
The use of this tool is especially recommended for valves of the
small series (DN 40-65/inch 1,5”-3”), as access to the lower
shaft seal from the top is impossible as a result of the
narrow seat.
Attention:
Do not damage the seal lip of the PTFE seal during assembly.
To avoid injuries the disassembly tip must be covered by the
assembly mandril if not used.
1) Assembly of the PTFE seal (fig. 1,2)
a) Press the PTFE ring into an oval shape.
b) Introduce the PTFE ring from the top by means of the assembly
tool, the wide side to the front, through the intermediate ring of the
housing into the lower housing
(fig. 1) .
c) Pull the PTFE ring into a round shape by means of the assembly
mandril
(fig. 2/I) and press it into the groove - do not knock or
beat (fig. 2/II).
2) Assembly of the elastomer seal (fig. 1,3,4)
a) Slightly grease the seal.
b) Insert the elastomer from the top by means of the assembly tool,
the wide side to the front, through the intermediate ring of the
housing into the lower housing
(fig. 1) .
c) Fix the seal by means of the groove of the assembly mandril
(fig. 3/I) .
d) Press in the elastomer at one spot between the housing flange and
the PTFE
(fig. 3/II) .
e) By sliding the assembly mandril around the seal, the seal is
inserted completely into the groove
(fig. 4) . See to an even fit
of the elastomer seal in the groove.
seal 37, 36
assembly tool
seal lip
elastomer seal
PTFE-seal
assembly mandril
disassembly tip
!
11. Disassembly and Assembly Tool