Maintaining the equipment
Maintenance schedule
Move nozzle needle by at least one full stroke.
Visually inspect to ensure tightness.
Replace a leaky stuffing box.
Connections
Body gasket
Cone guide
Visually inspect for the following points:
Tightness
Cleanliness
Replace leaky or worn components.
Remove dirt.
Check that the actuator is securely seated on the
equipment and inspect bolts.
Tighten loose connections.
Retightening the stuffing box
Component parts that get hot during
operation can cause burnings.
Always wear thermally insulated and
heat resistant safety gloves when
operating the lever.
If fluid escapes via the stuffing box gland (8),
retighten the stuffing box bush.
Unscrew the nozzle needle (25) by a half turn.
The torque for the stuffing box screws varies
depending on the equipment:
For models with DN 15 to DN 32, the required
torque is 7 Nm.
For models with DN 40 and DN 50, the required
torque is 11 Nm.
Tighten the stuffing box screws (28) to the
specified torque.
Make sure the following conditions are satisfied:
The valve must be able to open and close.
No more fluid escapes from the stuffing box
gland.
If you are unable to eliminate the leak, replace
the stuffing box as described on page 30.
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