Val-Matic 3-24 Butterfly Valve - Manual (Page 7)

7
MAINTENANCE
The Series 2000 Butterfly Valve requires no
scheduled lubrication or maintenance other than
regular exercising. The exercising is achieved by
fully opening and closing the valve to verify smooth
operation. If operation is difficult, it may be
necessary to flush sediment from the valve by
opening and closing the valve several times under
flowing conditions or checking the lubricant in the
gear actuator.
The recommended interval for exercising is every six
months or annually if the valve is regularly operated.
Over the life of the valve, inspection and some
regular adjustments may be needed as given below.
PACKING ADJUSTMENT: The shaft is equipped
with a set of V-shaped packing which is factory-set
for drop-tight service. The packing is pressure
assisted and does not normally require adjustment.
Should leakage occur, the packing can be replaced.
FIGURE 9. 3"-24" PACKING ASSEMBLY
PACKING REPLACEMENT: To replace the packing,
it is recommended that the line be drained and the
actuator removed. The valve can remain in the line.
1. To replace the packing, first open the valve and
drain the line.
2. Close the valve to hold the plug in position. For
power actuators, turn off and lock out electrical
and hydraulic supplies before proceeding.
3. Remove small round cover on actuator to
expose shaft and key.
4. Remove actuator mounting bolts and adapter
plate or packing retainer plate.
5. Lift actuator and plates from valve taking care
not to lose square key (14).
6.
Remove old packing (13) with packing hook.
7. Lubricate new packing with FDA grease and
set in place one ring at a time taking care not to
bend over the lips of the packing rings.
8. Reinstall actuator mounting plates. Clean off all
grease from the surfaces of the actuator
mounting surfaces.
9.
With valve in the closed position, place actuator
over valve and reinsert key (14).
10. Finally, with valve closed, install cover on
actuator indicating “Closed".
WARNING: Drain Line and close valve
before removing actuator or
valve may rotate suddenly
causing bodily injury or
damage to property.
CAUTION: Opening and Closing of the
valve should be done slowly
to prevent water hammer.