ARI Armaturen Vacuum breaker PN40 EN - Manual (Page 6)

Page 6 Rev. 0040807005 2404
Operating and installation instructions
Vacuum breaker
6.0 Putting the valve into operation
7.0 Care and maintenance
Maintanance and maintenance-intervals have to be defined by the operator according to
the requirements.
7.1 Cleaning / replacing venting valve
(refer to Fig. 1 page 4)
- Unscrew screw cap (pos. 6) from body (Pos. 1).
- Remove ball (pos. 2) from seat.
- Clean body interior, thread, bores, screw cap (Pos. 6) and ball (Pos. 3).
- Check seat chamfer in body (Pos. 1) and ball (Pos. 3) for possible wear.
- If wear is found, replace the complete unit.
- If no wear is found the ball (Pos. 3) can be placed on the seat bore.
- Tighten screw cap (Pos. 6) (see 7.3).
ATTENTION !
- Before putting the valve into operation, check material, pressure, temperature
and direction of flow.
- Regional safety instructions must be adhered to.
- Residues in piping and valves (dirt, weld beads, etc.) inevitably lead to leakage.
- Touching the valve when it is operating at high (> 50 °C) or low (< 0 °C) media
temperatures can cause injury.
Affix warning notice or protective insulation as appropriate!
Before putting a new plant into operation or restarting a plant after repairs or
modification, always make sure that:
- All works has been completed!
- The valve is in the correct position for its function.
- Safety devices have been attached.
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 for PN16-40 or
“Rivolta” lubricant and parting agent silver for PN63 onwards).