Honeywell ML4115, ML8115 Data Sheet

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

ML6420A 60 sec or

ML7420A

ML6421A 95 sec 405 (1800)

ML7421A

ML6421B 175 sec 1-1/2 (38)

ML7421B

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.

Run Time

at 60 Hz

30 sec

Stem Force

in lbf (N)

135 (600) 3/4 (20) Electric

Stroke in

in. (mm) Description

Linear Valve Actuator

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

NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS

2-1/2 (64)

7 (178 ) X 7 (178)

5-5/8 (142)

9-3/8 (239)

10-3/8 (264)

14-1/4 (360)

1-3/8 (35)

8 (204)

11-7/8 (301)

12-3/4 (326)

16-7/8 (430)

1-7/8 (48)

5-9/16 (141)

9-3/16 (233)

9-9/16 (242)

12-11/16 (322)

1-3/8 (35)

KNOCKOUTS (2) 7/8 (22)

MINIMUM

CLEARANCE

ML6421, ML7421 ML6420, ML7420

ML6421A, ML7421A ML6421B, ML7421B ML6420, ML7420

E (YOKE DIAMETER)

5-5/15 (135)

x 6-5/16 (161)

2-11/16

(67)

M17463

1/2

(13)

FPT

Fig. 1. Approximate dimensions in in. (mm).

TYPICAL SPECIFICATION

Valve actuators shall mount directly to the bonnet of the valve, and connect to the valve stem without requiring adjustments, linkages, brackets or adapters.

Direct coupled valve actuators shall be 24 Vac power, available with floating or analog control signal inputs, and available for either direct (stem down to close) or reverse acting (stem up to close) stroke direction.

Models with spring return and non-spring return shall be available. Non-spring return actuators shall have manual override capability without removal of the actuator cover or actuator.

Auxilliary switches, auxilliary feedback, and high temperature kits for steam applications, shall be optional factory accessories for direct coupled valve actuators.

Direct coupled valve actuators shall be manufactured by the same company that manufactures the valves. Actuators shall be UL and CSA listed, manufactured under ISO 9001 International Quality Control Standards.

Table 1. Close-off Ratings for Electric Linear Valve Actuators and Honeywell Valves (psi).

Type Valve 1/2 in. 3/4 in. 1 in. 1-1/4 in. 1-1/2 in. 2 in. 2-1/2 in. 3 in. 4 in.

ML6420, ML7420

Flange V5011A — — — — — — 28 16 — — —

V3350/3351/3450/3451 — — — — — — 21 14

V5013B,C; V3360/3361/

———— — —

3460/3461

NPT V5011F,G

V5011H,J 150 150 150 145 — — — —

V5011N1xxx,

230 230 163 104 67 37

V5011N3xxx, V5013N

V5011N2xxx

100

V5013F 150 150 150 126 77 49

ML6421, ML7421

Flange V5011A,B,C — — — — — — 77 53 29 18 12

V5011B ———— — —— —

V3350/51/60/61; V3450/ 51/60/61

NPT V5011F,G

V5011N1xxx, V5011N3xxx, V5013N

V5011N2xxx

V5013F 150 150 150 150 150 150

For use with ML6421B or ML7421B Actuators only.

Represents maximum pressure difference between the outlet and either of the two inlets.

Do not exceed 100 psi with V5011G valves used in steam applications.

Rating is for steam at maximum 100 psi. Ratings for water applications are the same as for the V5011N1xxx.

Automation and Control Solutions

Honeywell International Inc.

———— — —

150

230 230 230 230 230 126 — —

100

By using this Honeywell literature, you agree that Honeywell will have no liability for any damages arising out of your use or modification to, the literature. You will defend and indemnify Honeywell, its affiliates and subsidiaries, from and against any liability, cost, or damages, including attorneys’ fees, arising out of, or resulting from, any modification to the literature by you.

150c150c134

100d100d100

150c150c150

100d100d100

77 49 28 16

150

100

150

100

5 in.a6 in.

100 61 — — —