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93F-27855-10
4. VB-7000 Globe Valves
Actuators & Linkages
4. VB-7000 Series Globe Valves
Actuators & Linkages
Application
The MK-46xx Series and MK-4621-422 proportional pneumatic actuators, with 11
sq. in. (71 cm
2
) effective diaphragm area, are used to control ½"…2" VB-7000 series
valves.
Features
• Rugged die cast aluminum construction.
• Rolling diaphragm.
• Multiple spring ranges for various applications.
• Adjustable start point (refer to Specifications).
• ½" nominal stroke.
• Can also be used on ½” stroke discontinued VB-9xxx series valves (½"…1¼”).
Model Table
Model Number
Nominal Spring Range
a
psig kPa
MK-4601
3…6 21…41
MK- 4611
5…10 34…69
MK-4621
10…13 69…90
MK-4621-422
10…11.25 69…77
MK-4641
3…13 21…90
a -
Nominal (no load) condition, spring ranges based on ½" (13 mm) maximum stroke.
Specifications
Construction
Compatible with proportional pneumatic signal. Refer to Model Table.
Housing
Die cast aluminum.
Diaphragm
Replaceable, beaded, molded, neoprene (Part number PNV-002).
Stroke
½" (12.7 mm) nominal.
Spring
Retracts actuator shaft and raises valve stem on loss of air pressure.
Nominal Sring Range
Refer to Model Table.
Starting Point

MK-4601, MK-4621

MK-4611, MK-4641
±2 psig (14 kPa).
Air Connections
1/8" FNPT.
Max. Air Pressure
30 psig (207 kPa).
Environment
Ambient
Temperature Limits
Shipping: -40…220° F (-40…104° C)
Operating: -20…220° F (-29…104° C)
Valve Linkage

Mounting

Dimensions
3-7/8 x 4¾ x 4¾" (99 x 121 x 121 mm)
Maintenance Parts
See F-26033
Accessories
Positioner
AK-42309-500
Positive positioner & linkage; use with MK-46x1-0-2.
TOOLS (factory-available)
TOOL-095-1
Pneumatic calibration tool kit.
MK-46xx
Proportional Pneumatic Valve Actuator
MK-46xx Pneumatic
Actuator - Proportional