ARI Armaturen Metallic sealing EN - Manual (Page 7)

Operating and installation instructions
Change over valve
Rev. 0040110000 0410 Page 7
7.0 Care and maintenance
Maintanance and maintenance-intervals have to be defined by the operator according to
the requirements.
- Observe safety instructions!
- Keep the spindle well greased!
- Lubricant:
e.g. Klüberpaste HEL 46-450 (at valves for oxygen: Klüberalfa YV93-302)
to order at: Klüber Lubrication München KG, Postfach 701047, D-81310 München
or a lubricant wich is suitable for the application.
- If the valve spindle (pos. 4) leaks, gradually tighten the stuffing box seal (pos. 6) evenly in
increments by means of the hex. nuts (pos. 19) until leaking stops.
- Replace stuffing box packings only after the system has cooled down and the pressure in
the plant has been relieved.
In the case of corrosive or aggressive mediums, drain and ventilate the valve before
replacing the packing.
fig. 3: Pattern with hinged bolts
ATTENTION !
Pay attention, that the lubricant is suitable for the media.
ATTENTION !
- Retighten the stuffing box packing if required and re-pack it in good time.
- For safety reasons we recommend that valves only be repacked when
depressurised.
- Refer to point 10.0 and 11.0 before dismantling the valve.