Non-Spring Return Electric Linear Valve
Actuators
ML6420, ML7420
ML6421, ML7421
The ML6420, ML7420, ML6421, and ML7421 Non-Spring Return Electric Linear Valve Actuators provide single-pole double-throw (spdt), Series 60 two-position and floating or modulating control to operate standard Honeywell valves in heating, ventilating, and air conditioning (HVAC) applications. The modulating actuators accept an analog output of 0 to 10 Vdc or 2 to 10 Vdc, and an internal selector plug can be used to reverse the direction of action.
SPECIFICATIONS
Models:
Model |
Run Time |
Stem Force |
Stroke in |
Description |
|
at 60 Hz |
in lbf (N) |
in. (mm) |
|||
ML6420A |
60 sec or |
135 |
(600) |
3/4 (20) |
Electric |
|
30 seca |
|
|
|
Linear Valve |
ML7420A |
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||
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Actuator |
ML6421A |
95 sec |
405 |
(1800) |
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ML7421A |
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ML6421B |
175 sec |
|
|
1-1/2 (38) |
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ML7421B |
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a Dependant on actuator model.
Dimensions: See Fig. 1.
Weight:
ML6420, ML7420: 2.9 lb (1.3 kg).
ML6421, ML7421: 5.1 lb (2.3 kg).
Electrical Ratings:
Power Input: 24 Vac (+10%, -15%), 60 Hz.
Power Consumption (at 24 Vac):
ML6420: 6 VA maximum.
ML7420: 7 VA maximum.
ML6421: 11 VA maximum.
ML7421: 12 VA maximum.
Signal Inputs:
ML6420, ML6421:
24 Vac across T1 and W: Drives stem downward.
24 Vac across T2 and B: Draws stem upward.
ML7420, ML7421: 0 to 10 Vdc or 2 to 10 Vdc.
Ambient Ratings:
Temperature:
Ambient Range: 14°F to 122°F (-10°C to +50°C).
Storage Range: -40°F to +158°F (-40°C to +70°C).
Humidity: 5 to 95 percent relative humidity, noncondensing.
Cable Entry:
ML6420, ML7420: Conduit connector and one case knockout for 1/2 in. conduit.
ML6421, ML7421: Two case knockouts for 1/2 in. conduit.
Protection Standard:
IP54.
Close-off Pressure Ratings: See Table 1.
SPECIFICATION DATA
FEATURES
•Quick and easy installation.
•No separate linkage or adjustments required.
•High close-off ratings.
•Force-limiting end switches.
•Synchronous motor.
•Maintenance-free, corrosion-resistant design.
•Manual operator.
•Conduit connector standard on ML6420, ML7420
•Conduit knockout standard on ML6421, ML7421.
•Accurate valve positioning.
•Low power consumption.
•Direct/reverse acting with ML7420, ML7421.
•Position feedback signal with ML7420, ML7421.
Actuator Material:
Cover:
ML6420, ML7420: ABS-FR plastic.
ML6421, ML7421: ABS plastic.
Base:
ML6420, ML7420: PBTP-FR plastic.
ML6421, ML7421: Diecast aluminum.
Yoke: Diecast aluminum.
Approvals:
Underwriter’s Laboratories, Inc. Component Recognized.
Meets UL94-5V plenum requirements.
Canadian Standards Association Listed.
Meets CE requirements.
Accessories:
43196000-001 High Temperature Kit (for actuators with 3/4 in. stroke). Increases the maximum temperature to 428°F (220°C).
43196000-102 High Temperature Kit (for actuators with 1- 1/2 in. stroke). Increases the maximum temperature to 428°F (220°C).
43191679-111 Single Auxiliary Potentiometer (10K ohm).
43191679-112 Single Auxiliary Potentiometer (220 ohm).
43191680-102 Dual Auxiliary Switch (24 Vac use only).
ML6420/ML6425 Only
43191679-101 Single Auxiliary Potentiometer.
43191679-102 Single Auxiliary Potentiometer.
43191679-103 Dual Auxiliary Potentiometer.
43191679-104 Dual Auxiliary Potentiometer.
43191680-105 Dual Auxiliary Switch (24 Vac use only).
ML7420/ML7425 Only
43191680-205 Dual Auxiliary Switch (24 Vac use only).
63-1256-02
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