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CORRECT: NORMAL
FULL THREAD
1
TWO CLEAN THREADS
WITH MODERATE
AMOUNT OF DOPE
REAM PIPE AND BLOW
PIPE
OUT CHIPS (TO AVOID
ADAPTER
LODGING ON SEAT)
CORRECT
1
USE PIPE DOPE RESISTANT
TO ACTION OF LP GAS.
Fig. 14. Preparing pipes.
Mounting the ML7999 Actuator
1. Insert the shaft adapter and place the actuator over the
shaft. Position and seat the actuator.
NOTE: Use the 201391 shaft adapter (included with
the valve) to mount the ML7999 Actuator to the
V5197 Valve drive stem. Place the adapter as
shown in Fig. 16 so that the valve drive shaft is
between the adapter and the four setscrews.
2. Secure the actuator to the mounting bracket using a
bolt, nut and locking washer. See Fig. 17.
CAUTION
Equipment Damage Hazard.
Improper alignment can damage the actuator.
Align the ML7999 Actuator bottom panel parallel with
the ML7999 mounting bracket (Fig. 18). Failure to do
so will cause undue stress on the actuator motor and
shorten its operating life.
3. Partially tighten the four hub setscrews to ensure that
the actuator seats firmly against the mounting bracket
with the shaft centered in the actuator hub. See note 1
in Fig. 18.
4. Tighten the anti-rotation bolt to the torque
recommendation for the selected bolt/nut.
5. Tighten the hub setscrews against the shaft to a torque
of 60 in-lb (69 kg-cm). See Fig. 17.
INCORRECT: TOO LONG,
DISTORTS VALVE SEAT
LOOSE
CHIPS
EXCESS DOPE
CAN BLOCK DISK
FROM VALVE SEAT
PIPE
ADAPTER
INCORRECT:
TOO LONG,
DISTORTS VALVE SEAT
M16410
Fig. 15. Possible mounting positions of the
ML7999 Actuator and mounting bracket.
Fig. 16. Attaching the ML7999 Actuator mounting bracket
to the V5197 Valve (valve in the open position).
201391
SHAFT
ADAPTER
V5197
DRIVE STEM
Fig. 17. Proper positioning of 201391 shaft adapter
and V5197 drive shaft.
7
V5197A FIRING RATE GAS VALVE
ML7999
MOUNTING
BRACKET
M17685
ML7999A/B
ACTUATOR HUB
ML7999
SETSCREWS
M21027
65-0247—2
V5197
M17682
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