1.Overview of honeywell ml7984a4009 /u valve actuator
The Honeywell ML7984A4009/U valve AC is a motorized valve actuator. Self-contained and self-adjusting.
Engineers design this actuator for precise control in HVAC and industrial uses. It mounts onto V5011 two-way or V5013 three-way valves, providing up to 25 mm of linear travel (stem lift). The actuator works with Series 70 controllers that use 2-10 Vdc or 4-20 mA signals. It also works with Series 90 controllers that have 135 ohms and Super Mod modulating signal controllers.
Also called ML7984A4009/U Honeywell HVAC Valves or Resideo ML7984A4009, this is a direct-coupled valve actuator. It has a rated force of 160 lbf and does not have a spring return. Its self-contained, motorized valve linkage ensures smooth operation without manual adjustments.
2.Features of honeywell ml7984
l Uses one common transformer power supply for multiple actuators and controllers
l Self-contained, motorized valve linkage; linkage self-adjusts to valve stroke from 12 to 25 mm (1/2 to 1 in.)
l Strong valve seat closing force of 160 lbf (710 N)
l Multi-pose mounting and compact size for easy installation
l Compatible with Vac or Vdc power supply applications
l Electronic current sensing provides internal protection and positive full-closing force
l Available field-addable position feedback/auxiliary switch module
l Digital interface circuit for modulating and direct control applications
3.Product Specifications of ml7984a4009 actuator
Engineers designed the Honeywell ML7984A4009/U Valve Actuator for HVAC applications and included screw terminals for easy installation. Compatible with V5011/13, VGF21, and VGF22 valves up to 3 inches, as well as the V5045 when used with the 272629A adapter.
The actuator is 6 13/16 inches tall, 4 inches wide, and 3 3/16 inches deep. It weighs about 2.2 pounds (1 kg). Constructed with a UV-stabilized plastic cover and aluminum base and yoke, it features a direct/reverse acting switch.
You mount it using screws onto a 1/4-28 UNF threaded valve stem. It works at a frequency of 50/60 Hz.
It uses a supply voltage of 28 Vdc or 24 Vac. The driving power consumption is 6 VA. The holding power is 12 VA.
The actuator works well in temperatures from 32 to 130°F (0 to 55°C). You can store or ship it at temperatures from -40 to 150°F (-40 to 65°C).
It also operates in humidity levels of 15–95% RH at 104°F (40°C). The switch rating is 24 Vac. The actuator receives a NEMA 3R and IP54 environmental rating when you mount it vertically.
A valve actuator can handle control signals. These include 2–10 Vdc, SuperMod, 135 Ω potentiometer, or 4–20 mA. The non-spring return actuator stays in place in fail-safe mode. It has a torque rating of 160 lbf (710 N) and a stroke of 1/2 to 1 inch (13–25 mm).
The cable entry accommodates a 7/8 inch hole for 1/2 inch conduit. Nominal timing is 63 seconds at 3/4 inch stroke when driving at 60 Hz.
You can get position feedback with the 272630D module. It has a 2–10 Vdc output, but it does not allow for manual operation. The input impedance is 20 kΩ for voltage signals and 237 Ω for current signals.
4.Application
Many industrial and commercial systems commonly use the Honeywell ML7984A4009/U actuator. It helps control fluid or gas flow accurately. Typical applications include:
HVAC Systems – Controlling heating, ventilation, and air conditioning valves for optimal comfort.
Industrial Process Control – Managing fluid flow in manufacturing, chemical processing, and power generation.
Boiler and Chiller Systems – Adjusting valves for steam, water, or refrigerant flow efficiently.
Energy Management Systems – Optimizing energy usage through precise flow and pressure control.
Safety and Shut-off Applications – Acting as a fail-safe or automated shut-off mechanism in critical systems.
5.Related Part Numbers
Equivalent and Replacement Actuators
l ML7984A3001/U – Previous model in the ML7984 series, suitable for similar applications.
l ML6984A4000/U – Another actuator in the ML6984 series with similar specifications.
Adapter Kits and Accessories
l 272629A/U – Adapter kit for specific valve installations.
l 272630D/U – Alternative adapter kit with auxiliary switch option.
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