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Table Of Contents
F-27855-10138
7. VB-8/9000 Series
Actuators and Linkages
MK-6811/6911 Pneumatic
SR Actuators
MK-6911
MK- 6 811
MK-6811, MK-6911 Actuator Specifications
Inputs
Control Signal


(14…89 kPa)
Supply Pressure
15…20 psig (103…137 kPa) nominal
30 psig (205 kPa) maximum
Air Connections
1/8 in FNPT
Effective Area
50 sq. in. (323 cm
2
)
Outputs
MK- 6 811
1” (25 mm) nominal stroke
MK- 6 911
1¾” (45 mm) nominal stroke
Environment
Temperature
Limits
Shipping / storage: -40…220°F (-40…104°C) ambient.
Operating: -20°F…220°F (-29°C…104°C).

temperature of 281°F (138°C).

Positive Positioner
AK-42309-500 recommended for 5” valve, required for 6” valve. Order

assemblies.
MORE INFO
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7. VB-8/9000 Series
Actuators and Linkages