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Table Of Contents
F-27855-1094
4. VB-7000 Globe Valves
Actuators & Linkages
Application
MK-66xx proportional pneumatic actuators, with 50 sq. in. (323 cm
2
) effective dia-
phragm area, are used to control 1½"…2" VB-7000 series valves.
Features
Rugged die cast aluminum construction.
Rolling diaphragm.
Three spring ranges for various applications.
Start point adjustable ±2 psi.
Specifications
Construction
Housing
Die cast aluminum
Diaphragm
Replaceable beaded molded neoprene (Part number PNV-202).
Stroke
Refer to Model Table.
Spring
Retracts actuator shaft and raises valve stem on loss of air pressure.
Nominal spring range
Refer to Model Table.
Starting point

Maximum air pressure
30 psig (207 kPa)
Ambient temperature limits
Shipping
-40…220°F (-40…104°C)
Operating
-20…220°F (-29…104°C)
Air connections
1/8" FNPT
Valve linkage

Mounting

Dimensions
7¾ H x 10½ W x 10½ D" (199 x 267 x 267 mm)
Maintenance Parts
See F-26033
Model Table
Model No.
Nominal Spring Range
Nominal Stroke
in. (mm)
psig kPa
MK-6601
3…8 21…55
½ (13.7)
MK- 6611
5…10 34…69
MK-6621
8…13 55…90
MK-66xx Pneumatic
Actuator - Proportional
MK-66xx
Proportional Pneumatic Valve Actuator
4. VB-7000 Series Globe Valves
Actuators & Linkages