ARI Armaturen STEVI 446 EN - Manual (Page 11)

Rev. 0040301000 0410 Page 11
Operating and installation instructions
Str. thr. control valves - STEVI
®
440 / 441, 445 / 446
5.3 Installation instructions concerning actuators
Normally, control valves are supplied complete with actuator fitted.
It is not permitted to mantle / dismantle actuators with valves operating and service
conditions (temperature and pressure). The actuators must be assemble as describe in the
operating instructions during conversion and maintenance. The actuators will be
dismantled or assembled incl. adapter flange (pos. 34). The cylinder screws (pos. 35) need
to be loosen or tighten for it.
During assembly work, the plug is not be turned on its seating at closing pressure.
When retrofitting actuators, the maximum permissible force for valve actuation must be
taken into account:
6.0 Putting the valve into operation
ATTENTION !
Care must be taken with the bellow type valves when actuators are mounted or
removed. (Hold the valve-stem against turning with an open-end wrench!)
Series 440 / 445 Series 441 / 446
12kN for DN 15- 50 18kN for DN 15-100
29kN for DN 65-100 37kN for DN 125-150
40kN for DN125-150 37 kN for DN200-250
(only BR441)
59 kN for DN125v-150v
(only BR445/446)
59 kN for DN200-250
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.