ARI Armaturen STEVI BBD 415 DN 25-50 EN - Manual (Page 10)

Page 2-10 Rev. 0040321000 0714
Operating and Installation Instructions
Straight-through blow-down valves - STEVI
®
BBD 415
7.2 Replacing the valve trim
- Remove the actuator (refer to section
10.1).
- Loosen the nuts (pos. 11).
- Detach the mounting bonnet (pos. 7).
- Slacken the screw joint (pos. 19)
approximately 1 turn.
- Extract the plug (pos. 3) and stem (pos. 5).
- Drive the pins (pos. 4, 22) out with a drift.
- Bore new parts.
- Center locking pins (pos. 4, 22) and drive it
as pin-combination into the bore hole.
- Replace the flat gasket (pos. 9).
- Assemble in reverse order.
- Secure with the nuts (pos. 11) and tighten
crosswise
(for tightening torques refer to section 7.7).
- To assemble the actuator, refer to section
7.5.
ATTENTION !
Refer to sections 10.0 and 11.0 before dismantling the valve.
Fig. 5