ARI Armaturen ASTRA DN250-400 EN - Manual (Page 7)

Rev. 0040105004 0212 Page 7
Operating and installation instructions
ASTRA
®
- Planners / construction companies or operators are responsible for positioning and
installing products.
- The valves are designed for application, not influenced from weather.
- 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 Mounting the handwheel and display in
lagged pipe runs
5.2.1 Removing the handwheel
1. Close the valve by hand (pos. 5) (“0” position).
2. Unscrew the cap (pos. 23).
3. Lift off the handwheel (pos. 5) and the digital display
(pos. 20).
4. Insulation diameter:
DN 15- 50 = 60 mm
DN 65-200 = 87 mm
Do not remove the insulation cap.
5.2.2 Fitting the hand wheel and display
1. Set the digital display (pos. 19) in place, regard “0”
position.
2. Set the handwheel (pos. 5) in place.
3. Screw on the cap (pos. 23): DN 15- 50 = 11 Nm
DN 65-200 = 15 Nm
- Reference for isolation: If media-temperatures < ambient temperatures - ask
manufacturer.
- It is forbidden to heat the valve to above its service temperature (see data
sheets), for instance by welding, grinding, etc.
- To ensure that the valves function correctly, the pipe run should be straight for
at least 6 x DN upstream and 2 x DN downstream of the valve.
Fig. 5