Honeywell MS4103 manual ML6421 ML7421, 122

Direct Coupled Valve Actuator

ML6421; ML7421

Direct Coupled Globe Valve Actuators provide floating or modulating control of chilled water, hot water, or steam, and mount directly on VGF series, V5011, and V5013 valves. These Non-Spring Return Actuators will operate 1/2 to 6 in. valves.

SPECIFICATIONS
Actuator Type	Valve
Control Signal	Floating; 0-10 Vdc or
	2-10 Vdc modulating
Fail Safe Mode	Stays in place

FEATURES

•Easy and quick installation on valves with 1 3/8 in. bonnet and 3/4 in. stroke, or with 1 7/8 in. bonnet and 1 1/2 in. stroke.

•High force for VGF Pressure-balanced valves.

•No separate linkage required.

•Conduit connector standard.

•No adjustments required on linkage.

•Accurate valve positioning.

•Low power consumption.

•High close-off ratings.

•Force limiting end switches.

•Manual operator.

•Synchronous motor.

•Maintenance free.

DIMENSIONS DIAGRAM

ML6421, ML7421 ML6420, ML7420

(Rated) Stem Force	405 lbf (1800 N)
Cable Entry	Two knockout holes for 1/2 in.
	conduit standard on actuator
	case
Electrical Protection	Class I Insulation (24 Vac)
Ingress Protection Rating	IP54
Electrical Connections	Screw terminals
Frequency	60 Hz
Manual operation	Knob
Mounting	Directly on V5011/V5013
	Globe Valves and VGF
	Flanged Globe Valves

7 (178 ) X 7 (178)

2-1/2 (64)

D

MINIMUM

CLEARANCE

CC

B

B

A

5-5/15 (135) x 6-5/16 (161)

2-11/16

(67)

Stroke	3/4 in. (20 mm); or
	1 1/2 in (38 mm)
Materials	ABS Plastic
Operating Humidity Range (% RH)	5 to 95% RH
Medium Temperature	300 F Maximum
	(150 C Maximum)
Ambient Temperature Range	14 F to 122 F (-10 C to +50 C)
Storage Temperature Range	-40 F to 158 F (-40 C to 70 C)
Weight	5.1 lb (2.3 kg)
Includes	1/2 in. conduit hub
APPROVALS
Canadian Standards Association	Certified
CE	Recognized
Underwriters Laboratories, Inc	UL94-5V

ACCESSORIES

43191679-101—Auxiliary Potentiometer for ML6421A

43191679-102—Auxiliary Potentiometer for ML6421B

43191680-102—Dual Auxiliary Switch for CREVAL actuators

43196000-001—High Temperature Kit for actuators with 3/4 in. stroke 43196000-038—High Temperature Kit for actuators with 1-1/2 in. stroke

A 1/2

(13) FPT

E (YOKE			KNOCKOUTS (2)			E (YOKE
DIAMETER)			7/8 (22)			DIAMETER)
	ML6421A, ML7421A			ML6421B, ML7421B		ML6420, ML7420
A		5-5/8 (142)		8	(204)	5-9/16 (141)
B		9-3/8 (239)		11-7/8 (301)		9-3/16 (233)
C		10-3/8 (264)		12-3/4 (326)		9-9/16 (242)
D		14-1/4 (360)		16-7/8 (430)		12-11/16 (322)
E		1-3/8	(35)	1-7/8	(48)	1-3/8 (35)	M17463

122