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Honeywell ML7999B universal direct coupled actuator provides 100 lb-in. torque, 4 to 20 mA control input to control combustion air dampers and modulation valves. Includes precision drive shaft control and integral power supply.


  • Separate wiring compartment between line voltage power wiring and low voltage control
  • Programmable actuator stroke against 4-20 mA input
  • Couples directly to 1/2-in. shaft with no additional parts required; couples directly to 5/16- and 3/8-in. shafts using available self-centering shaft reduction accessories
  • Shaft coupler assembly available for shafts larger than 1/2-in.
  • Bracket accessory kit available for mounting to Honeywell V51 butterfly gas valves
  • Visual indication of actuator position
  • NEMA 2
  • IF54 with weatherproof kit

Product Specifications

50 Hz; 60 Hz
Approvals, Underwriters Laboratories Inc.
Meets UL873
Approvals, Canadian Standards Association
Operating Humidity Range (% RH)
5 to 95% RH, non-condensing
15VA,100 to 240 Vac
Shipping and Storage Temperature Range (F)
-40 F to +150 F
Shipping and Storage Temperature Range (C)
-40 C to +65 C
Approvals, CE
0.0 to 0.5g continuous
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