Summary of the content on the page No. 1
ML6420, ML7420
Non-Spring Return
Electric Linear Valve Actuators
PRODUCT DATA
FEATURES
• Quick and easy installation.
• No separate linkage required.
• Conduit connector is standard.
• No adjustments required.
• Low power consumption.
• High close-off ratings.
• Force-limiting end switches.
• Manual operator.
• Synchronous motor.
• Corrosion resistant design.
• Maintenance free.
APPLICATION
• Direct/reverse acting with ML7420.
The ML6420 Non-Spring Return Electric Linear Valve
Actuators are f
Summary of the content on the page No. 2
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS SPECIFICATIONS Models: B and 24 Vac: Drives valve stem down. W and 24 Vac: Draws valve stem up. Run Time in Stroke in ML7420: 0 to 10 Vdc or 2 to 10 Vdc. Model sec at 60 Hz in. (mm) Description a ML6420A 3/4 (20) Electric Linear Actuator Material: 30 or 60 Valve Actuator Cover: ABS-FR plastic. ML7420A Base: PBTP-FR plastic. a Yoke: Diecast aluminum. Dependant on actuator model. Actuator Stroke: 3/4 in. (20 mm). Dimensions: See Fig
Summary of the content on the page No. 3
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS Table 1. Close-off ratings for ML6420, ML7420 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. FlangeV5011A — —— —— —28 16 V3350/3351/3450/3451 — — — — — — 21 14 a a V5013B,C; V3360/3361/3460/3461 — — — — — — 21 14 b b b b NPT V5011F,G 77 49 28 16 150 150 134 150 V5011H,J 150 150 150 145 — — — — V5011N1xxx, V5011N3xxx, V5013N 230 230 163 104 67 37
Summary of the content on the page No. 4
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS All wiring must comply with local electrical codes, ordinances and regulations. Voltage and frequency of the transformer used with the actuator must correspond with the power supply and actuator characteristics. See Fig. 6 through 11 for typical wiring hookups. 1. Feed power and control wires through the conduit connector located on the bottom of the actuator case. See Fig. 5. CAUTION Equipment Damage Hazard. Conduit connecti
Summary of the content on the page No. 5
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS ML7420 WIRING 2 ML7420 STRIP SENSOR WIRING INPUT F F 2 4 6 1 3 5 STRIP (FEEDBACK) OUTPUT + + 1 F L1 3 – – + (HOT) T2 L2 – T1 DUAL T2 1 TRANSFORMERS 3 2 O1 T1 O2 O1 1 500 OHM O2 L1 RESISTOR T775 (HOT) (WITH 4-20 MA OUTPUT) L2 L1 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND (HOT) OVERLOAD PROTECTION AS REQUIRED. 1 L2 2 2-10 Vdc FEEDBACK SIGNAL. SEE OUTPUT SIGNAL FEEDBACK SECTION. 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS 3 0-10
Summary of the content on the page No. 6
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS M17428 Fig. 13. Replacing actuator cover. 63-2533—03 6
Summary of the content on the page No. 7
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS Auxiliary Potentiometers The 43191679 Auxiliary Potentiometers can be used as feedback potentiometers and to provide remote indication of valve position. See the Installation Instructions packed with the potentiometers. Auxiliary Switches The 43191680 Dual Auxiliary Switch can be used on both the ML6420 and ML7420 Electric Linear Valve Actuators. Switching points are adjustable over the full length of the actuator stroke; for
Summary of the content on the page No. 8
ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS Direction of Action (ML7420/25 only) ML7420 The direction of the actuator action can be changed using the WIRING pushbutton and LED, which is factory set so that the actuator 2 STRIP drives the valve stem down on increasing signal and draws INPUT F F the valve stem up on decreasing signal. With the valve stem (FEEDBACK) OUTPUT + + up, the output signal from the feedback (F) function is either 0 3 or 2 Vdc. The output of the si
