3 in. (76 mm) for Actuators with
mechanical auxiliary switches
Fig. 2. Minimum Mounting Clearance.
Short and rapid cycling/repositioning may result
in possible switch device lock-up or reduced
When Installing This Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard-
2. Check ratings given in instructions and on the prod-
uct to ensure the product is suitable for your applica-
3. The installer must be a trained, experienced service
4. After installation is complete, check out product
operation as provided in these instructions.
ML6984, ML7984 SERIES 4000 DIRECT COUPLED VALVE ACTUATORS
1/4 - 20 NUT
Fig. 1. ML6984 Valve Actuator Dimensions, in. (mm).
12 in. (305 mm)
1/4 - 28UNF
5. DO NOT electrically operate the actuator before
assembly to the valve because damage not apparent
to the installer may occur.
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 condi-
tion can require repair or replacement of the valve.
Protect the stem from damage due to bending or
scratching. Damage to the stem packing may
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
1. Ensure that valve body is installed correctly, arrow
pointing 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 actua-
tor. For the same reason, do not mount ML Actuators
to steam valves in enclosed cabinets. For on-off con-
trol of steam in small pipe sizes, Honeywell recom-
mends V8043J zone valves.
NOTE: NEMA 3R rainproof rating only applies to actua-
tors mounted vertically. Cover has been treated
with UV stabilizers for outdoor applications.
0.19 (5) DIA.