Brochure

MK-46xx Series, MK4-46xx Series

Valve Actuators, Proportional

Model Chart

Specifications

For proportional pneumatic actuator with 11 sq. in.

(71 cm

) effective diaphragm area used to control

1/2 in. to 2 in. VB-7xxx series valves and SP-3xx00

step controllers.

Features:

• Rugged die cast aluminum construction.

• Rolling diaphragm.

• Multiple spring ranges for various applications.

• Adjustable start point (refer to Specifications).

• 1/2 in. nominal stroke.

• Can also be used on 1/2" stroke discontinued VB-9xxx

series valves (1/2” to 1-1/4”).

Model No.

Nominal Spring Range

Nominal (no load) spring ranges based on 1/2 in. (13 mm) maximum stroke.

psig kPa

MK-4601, MK4-4601 3 to 6 21 to 41

MK-4611, MK4-4611 5 to 10 34 to 69

MK-4621, MK4-4621 10 to 13 69 to 90

MK-4621-422 10 to 11.25 69 to 77

MK-4641 3 to 13 21 to 90

Construction

Housing Die cast aluminum.

Diaphragm Replaceable beaded molded neoprene (Part number PNV-2).

Stroke 1/2 in. (25.4 mm) nominal.

Spring Retracts actuator shaft and raises valve stem on loss of air pressure.

Nominal spring range Refer to Model Chart.

Starting point Field adjustable.

MK-4601, MK-4621 (-422) +1/2 psig (7 to 14 kPa).

MK-4611, MK-4641 r2 psig (14 kPa).

Maximum air pressure 30 psig (207 kPa).

Ambient temperature limits

Shipping -40 to 220qF (-40 to 104qC).

Operating -20 to 220qF (-29 to 104qC).

Air connections 1/8 in. FNPT.

Valve linkage Order separately AV-401.

Mounting In any upright position with actuator head above the center line of the valve body.

Dimensions 3-7/8 H x 4-3/4 W x 4-3/4 D in. (99 x 121 x 121 mm).

Series

MK4-4

Series