ARI Armaturen WA 206R EN - Manual (Page 7)

Rev. 0040319001 4709 Page 7
Operating and installation instructions
3-way/str.thr. control valves - WA206/216/306/316
7.0 Care and maintenance
7.1 Replacement of stem sealings
If the stem starts leaking, the sealing is worn out and must be replaced.
- Remove actuator. (Refer to operating instructions for actuator!)
- Unscrew worn stem sealing (pos. 8) from the body (pos. 1) and pull it off the stem (pos. 7).
- Check valve stem (pos. 7) for deposits and damage; if possible, remove with fine polishing
linen.
- Otherwise the stem (pos. 7) must be replaced (for description refer to item 7.2), since a
new sealing will soon start leaking again if the stem is damaged.
- Carefully push the new stem sealing (pos. 8) – factory-greased – onto the stem (pos. 7).
- Screw tightly into position
Tightning torques for stem seal:
ATTENION !
Refer to item 10.0 and 11.0 before dismantling the valve.
DN Torque
15 - 50 70 Nm
65 - 150 145 Nm
Fig. 6: WA306H, WA316H Fig. 7: WA306R