Submittal Sheet

ML6984, ML7984 SERIES 4000 DIRECT COUPLED VALVE ACTUATORS
3
95C-10939—6
IMPORTANT
Before installing the valve, raise and lower the
valve stem to make sure that the valve stem
operates freely. Impaired stem operation can
indicate that the stem was bent by rough handling.
This condition can require repair or replacement of
the valve.
Protect the stem from damage due to bending or
scratching. Damage to the stem packing
may result.
Proper Use:
Valves are to be installed by skilled personnel and in
strict accordance with installation in struc tions and local
reg u la tions. Honeywell assumes no responsibility for
dam ag es or injuries resulting from non-compliance with
in stal la tion in struc tions or standard good practice when
mounting, operating, or maintaining the valves, even if not
explicitly mentioned in the installation instructions. Observe
all safety practices when working with steam systems.
Mounting:
1. Ensure that valve body is installed correctly, arrow
pointing in the direction of fl ow.
2. Actuator can be mounted in any position; however, it is
preferable that it is mounted above the horizontal plane
of the pipe. This minimizes the risk of damage to the
actuator in the event of con den sa tion or valve gland
leak. When controlling steam, rotate the valve body
with the actuator beside the valve to avoid exceeding
ambient temperature limits of the actuator. For the
same reason, do not mount ML Actuators to steam
valves in enclosed cabinets. For on-off control of steam
in small pipe sizes, Honeywell recommends V8043J
zone valves.
NOTE: NEMA 3R rainproof rating only applies to ac tu a tors
mount ed vertically. Cover has been treated with
UV stabilizers for outdoor applications.
Weather-proof conduit fi ttings ap proved for
outdoor and wet locations must be used to
main tain NEMA 3R rating.
3. Remove stem button (Fig. 3) from valve stem.
4. (Optional) Snap red position indicator (metal clip)
over valve stem and position for best visibility (Fig. 3).
Indicator will self-align to the marking on yoke after
complete operating cycle. It is recommended that this
is done after actuator installation.
INSTALLATION
CAUTION
Short and rapid cycling/re po si tion ing may result in
possible switch device lock-up or reduced
service life.
When Installing This Product...
1. Read these instructions carefully. Failures to follow
them could damage the product or cause a
haz ard ous condition.
2. Check ratings given in instructions and on the product
to ensure the product is suitable for your application.
3. The installer must be a trained, experienced
service technician.
4. After installation is complete, check out product
operation as provided in these instructions.
5. DO NOT electrically operate the actuator before
assembly to the valve because damage not apparent
to the installer may occur.
Fig. 2. Minimum Mounting Clearance.
Fig. 1. ML6984 Valve Actuator Dimensions, in. (mm).
M25485
4.0
(20)
7/8 (22)
4.06
(103)
3.2
1/4 - 28UNF
1.368 (34.7)
1.65
0.19 (5) DIA.
0.39 (10)
2.71
(Y
e
llo
w
)
2.83
(S
ilve
r)
(
68.8
)
(
71.8
)
(102)
Knockout
0.78
(81)
3.07
(78)
1.53
(39)
1/4 - 20 NUT
(2)
4.02
(102)
2.01
(51)
MOUNTING DIA.
0.80
(20.5)
2.09
(53.2)
0.27
(7)
2.20
(56)
(42)
3.22
(82)
0.75 (19)
NORMAL STROKE
3.09
(77.5)
4.57
(116)
7.04
(178.8)
M25486
3 in. (76 mm) for Actuators with
mechanical auxiliary switches
12 in. (305 mm)
Clearance
Minimum Mounting