ARI Armaturen SAFE-TCP/TCS950 EN - Manual (Page 13)

Rev. 0040401000 2913 Page 2-13
Operating and installation instructions
SAFE, SAFE-P, SAFE-TC, SAFE-TCP/TCS
- when carrying out any adjustment work hold the spindle (pos. 14) firm to prevent it
twisting.
- Change seals.
- Fit bonnet (pos. 11/42) and reset the set pressure; make sure spring setting range is
appropriate.
- Secure spring setting by means of lock nut (pos. 21).
- Assemble lifting device.
- If necessary, replace both spring plates (pos. 26) and use longer studs (pos. 3) when
fitting a spring for a higher set pressure.
- Further information obtainable from the manufacturer.
ATTENTION !
- Torques must be observed:
- Check spring marking in accordance with manufacturer’s data.
- Note spring setting range.
Only for series 900: DN20-100 (except safety valves with ASME approval)
ATTENTION !
When changing the set pressure and fitting a new spring, note that safety valves
with set pressures between 0.2 and 1.5 bar have a greater lift.
Therefore:
Only for series 950:
ATTENTION !
Safety valves for horizontal application, must also to be set in a
horizontal position (  4.9 bar).
M10 16-25 Nm screw joint BR940 100 Nm
M12 30-40 Nm screwed seat BR940 180 Nm
M16 70-90 Nm bonnet BR950/960 60 Nm
M20 150-175 Nm
Set pressure in the range Spring change only in
the range
0.2 to 1.5 bar 0.2 to 1.5 bar
> 1.5 bar > 1.5 bar