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7/8 (22)
Knockout
4.0
(102)
0.78
(20)
INSTALLATION
3 in. (76 mm) for Actuators with
mechanical auxiliary switches
Fig. 2. Minimum Mounting Clearance.
CAUTION
Short and rapid cycling/repositioning may result in
possible switch device lock-up or reduced service
life.
When Installing This Product...
1. Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous condi-
tion.
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 opera-
tion as provided in these instructions.
ML6984, ML7984 SERIES 4000 DIRECT COUPLED VALVE ACTUATORS
4.02
1/4 - 20 NUT
(102)
(2)
2.01
(51)
1.53
(39)
3.2
(81)
3.07
(78)
4.06
(103)
Fig. 1. ML6984 Valve Actuator Dimensions, in. (mm).
12 in. (305 mm)
Minimum Mounting
Clearance
M25486
1/4 - 28UNF
1.368 (34.7)
MOUNTING DIA.
0.80
(20.5)
2.09
NORMAL STROKE
(53.2) 0.27
(7)
5. DO NOT electrically operate the actuator before assem-
bly to the valve because damage not apparent to the
installer may occur.
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 instructions and local regulations.
Honeywell assumes no responsibility for damages or injuries
resulting from non-compliance with installation instructions 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 point-
ing in the direction of flow.
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 condensation 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 actuators
mounted vertically. Cover has been treated with UV
stabilizers for outdoor applications. Weather-proof
conduit fittings approved for outdoor and wet loca-
tions must be used to maintain NEMA 3R rating.
3
7.04
(178.8)
4.57
(116)
3.09
(77.5)
0.75 (19)
1.65
(42)
0.39 (10)
2.20
0.19 (5) DIA.
(56)
3.22
(82)
M25485
95C-10939EFS—03
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