Submittal Sheet

ML7984 VaLVe actuator
95C-10753—02 2
Accessories/Parts
272630A: Auxiliary switch assembly (1-SPDT)
272630B: Auxiliary switch assembly (2-SPDT)
40003793-003: Mounting hardware bag assembly
272822: Resistor kit for multiple Series 90 application and for
ML7984 to replace the old ML784 (4-20 mA)
Mechanical Ratings
Stroke: 19mm (3/4”) or less
Stroke timing: Approx. 63 seconds for 3/4” stroke
Closing Force: 710N (160 lbs.) Nominal*
*Rating applies to both directions.
Performance Specications
Life Expectancy (at rated load and power conditions):
50,000 full stroke cycles plus 1,000,000 repositions at 10%
stem travel or 10 years, whichever occurs rst.
NOTE: Rapid repositioning will result in reduced service life
of the actuator.
INSTALLATION
CAUTION
Equipment Damage Hazard.
Installer must be a trained service
technician.
Do not electrically operate the ML7984 before
assembly to the valve because damage not ap-
parent to the installer may occur.
Mounting
1. Ensure that the valve body is installed correctly, that is,
the arrow points in the direction of the ow.
2. Although the actuator can be mounted in any position,
it is preferable that the ML7984 is mounted above the
valve body. This will minimize the risk of damage to the
ML7984 in the event of condensation or a valve gland
leak.
3. Remove the stem button (Fig 3) from the valve stem.
Save the set screw inside the stem button for later
installation. The button itself is not needed.
4. Slide the position indicator (plastic disk or rubber
O-ring) over the valve stem. (See inset, Fig 3) Indica-
tor will selfalign to the marking on the yoke after one
complete operating cycle.
4
(102)
3-13/64
(82)
3-1/16
(78)
1/4 – 20 NUT [2]
1-3/8 (35)
MOUNTING
DIA.
3/4
(19)
NOMINAL
STROKE
7/8 (22)
KNOCKOUT
M32553
25/32
(20)
4-1/16
(103)
1-17/32
(39)
2 (51)
4-1/64
(102)
1/4 – 28UNF
51/64
(21)
2-3/32
(53)
17/64
(7)
25/64
(10)
13/64
(6)
3/16(5) DIA.
3-7/32 (82)
2-13/64 (56)
1-21/32
(42)
3-3/32
(78)
7-3/64
(179)
4-9/16
(116)
2-23/32 (69)
YELLOW
2-53/64 (72)
SILVER
Fig 1. Dimesions of ML7984 valve actuator in mm (in.).