Page
5
of 7
ECO-0438955
REV:A
Installation and Operation Manual
Needle Valves & Ball Valves
MAINTENANCE
H Series Screwed Head/Bonnet:
CAUTION:
Adjustment of the gland must be carried out at zero pressure
1. Fully close the valve by turning the handle (1) in a clockwise direction to stop lightly on seat
2. (max. 2 Nm).
3. Open the valve one full turn by rotating the handle (1) in a counter clockwise direction.
4. Loosen gland lock nut (4).
5. Tighten gland nut (3) to 11 Nm
6. Re-tighten gland lock nut (4) to 25 Nm.