ARI Armaturen CONA Universal ANSI 300 EN - Manual (Page 11)

Rev. 0040808001 0611 Page 11
Operating and installation instructions
CONA
®
Universal / CONA
®
Connector
7.0 Care and maintenance
Maintanance and maintenance-intervals have to be defined by the operator according to
the requirements.
7.1 Disassembling/assembling complete shut-off valve assembly
(refer to Fig. 8 page 7 - Fig. 9 page 7)
- Open stem (pos. 11) fully as far as the stop.
- Unscrew shut-off valve assembly (pos. 8) from body (pos. 1) by rotating to the left.
- Remove graphite insert (pos. 7).
- Unscrew hollow-core screw (pos. 14) using AWH assembly spanner.
- Remove seat (pos. 3).
- Assemble in reverse order (refer to item 7.6).
7.2 Replacing the packing rings
- Dismantle shut-off valve assembly (pos. 8) as described in 7.1.
- Rotate stem (pos. 11) in closing direction.
- Slacken cheese-head screw (pos. 18).
- Pull handle (pos. 19) away from stem (pos. 11).
- Release lock nut (pos. 13).
- Unscrew threaded bush (pos. 12).
- Withdraw stem (pos. 11) downwards from threaded bush (pos. 12).
- Dismantle cover ring (pos. 20) and packing rings (pos. 5).
- Clean packing chamber and stem surface.
- Push stem (pos. 11) into screw fitting (pos. 15) and fit new packing
rings (pos. 5).
- Assemble in reverse order (refer to item 7.6).
ATTENTION !
- refer to item 10.0 and 11.0 prior to dismantling and repair work!
- refer to item 6.0 before restarting the plant!
Prior to installation, threads and seal faces should be coated with temperature-
stable lubricant (e.g. “OKS Anti-Seize Paste” white/metal-free).
ATTENTION !
It is vital to avoid damage to stem surface and
packing chamber surface.
Fig. 10