ARI Armaturen WA 206R EN - Manual (Page 6)

Page 6 Rev. 0040319001 4709
Operating and installation instructions
3-way/str.thr. control valves - WA206/216/306/316
- For application outside or in adverse environments like corrosion-promoting conditions
(sea water, chemical vapours, etc.), special constructions or protective measures are
recommended.
5.2 Requirements at the place of installation
The place of installation should be easily accessible and provide ample space for
maintenance and removing the actuator. Stopvalves shoud be installed before and after the
controlvalve to enable maintenance working without draining the piping system. The valve
should preferably installed vertically with the actuator at the top. Inclined or horizontal
installation without supports is permissible only with light actuators.
Permissible servo weights for valves with unsupported horizontal stems:
20 kg for DN 15 - 50
25 kg for DN 65 - 150
The pipes must be lagged to protect the actuators from excessive heat. Sufficient space
must be left for the maintenance of the stem packing.
To ensure that the control valves function correctly, the pipe run should be straight for at
least 2 x DN upstream and 6 x DN downstream of the valve.
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 at service conditions
(temperature and pressure). The actuators must be assembled as describe in the operating
instructions during conversion and maintenance.
During assembly work, the plug is not be turned on its seatring 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
1800 N for DN 15-50
4500 N for DN 65-100
5000 N for DN 125-150
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.