ARI Armaturen SAFE-TCP/TCS950 EN - Manual (Page 11)

Rev. 0040401000 2913 Page 2-11
Operating and installation instructions
SAFE, SAFE-P, SAFE-TC, SAFE-TCP/TCS
7.0 Care and maintenance
Maintenance and maintenance-intervals have to be defined by the operator according to
the requirements.
- Lift the safety valve stem briefly (releasing the lever suddenly) to eliminate slight leaks due
to particles between the seat and disc.
- If this does not eliminate the leak, the sealing surfaces of the seat and/or disc have been
damaged.
This can only be rectified at our works or by an authorised contractor.
- With valves corresponding to Figures 901, 921 and 941, the lever must always be
returned to the original position after lifting the safety valve.
- With Fig. 951 and 961 the lift button must be pressed down again after lifting.
- The manufacturer accepts guarantee liabilities only if tampering by third parties is
prevented.
7.1 Setting instructions
7.1.1 Removing the cap
Open caps
- Remove slit pin (pos. 40), bolt (pos. 39).
- Extract lifting lever (pos. 41).
- Remove screw (pos. 38).
- Unscrew cap (pos. 29).
Closed caps
- Press lifting lever (pos. 36) towards bonnet (pos. 11) and against stop.
- Unscrew cap (pos. 28).
ATTENTION !
- Too frequent lifting for test purposes can increase wear of the sealing surfaces!
- The safety valve must be lifted from time to time in line with current regulations
(by   85% from the set pressure) to ensure that the valve works correctly.
(The intervals at which this must be done depends on various factors so that no
generally applicable interval can be specified)
- Original parts only should be fitted as spares as a matter of policy.
- In safety valves with an open spring bonnet there is a danger of being crushed
between the spring windings during lifting and setting.
ATTENTION !
The following work must only be carried out by authorised specialist workshops
or at the operator’s own responsibility with monitoring by an independent agency
(e.g. TÜV).
ATTENTION !
If there is back pressure or during setting/lifting, medium may be discharged from
the open bonnet, or into the adjusting screw area if the bonnet is closed.
ATTENTION !
When changing to the cap without lifting device (series 911, 923, 943), the
spindel cap (pos. 19) must be removed.