Schneider Electric MK-6600 Series, MK-6800 Series, MK-6911 Data Sheet
MK-6600 Series,
MK-6800 Series, and MK-6911
Pneumatic Valve Actuators
General Instructions
Application
These valve actuators, with a 50 sq. in. (323 cm2) effective diaphragm area, are used for proportional pneumatic control of hot water or chilled water valves.
•MK-66x1 is used to control 1-1/2 in. to 2 in. VB-7xxx series valves.
•MK-68x1 is used to control 2-1/2 in. to 4 in. VB-9xxx series valves
•MK-6811 is used to control 2-1/2 in. to 5 in.VB-8xx3 series valves and 2-1/2 in. to 4 in.
VB-9xxx series valves
•MK-6911 is used to control 6 in. VB-8xxx valves
Typical of MK-6600 Series
and MK-6800 Series
Features
• Rugged die cast aluminum housing.
• Replaceable beaded molded neoprene diaphragm.
• Built-in spring to retract output shaft.
• Adjustable start point on loss of air pressure.
Applicable Literature
• Pneumatic Products Catalog, F-27383
MK-6911
• Cross-Reference Guide, F-26789
• Reference Manual, F-21683
• Application Manual, F-21335
• AV-430 Linkage General Instructions, F-19072
• AV-495 Linkage General Instructions, F-21665
• AV-497 Linkage General Instructions, F-27253
Printed in U.S.A. 1/10 |
© Copyright 2010 Schneider Electric All Rights Reserved. |
F-13895-13 |
SPECIFICATIONS
Construction:
Housing, Die cast aluminum.
Diaphragm, Replaceable beaded molded neoprene. Stroke: (Table-1).
Effective Area: 50 sq. in. (323 cm2).
Spring: Retracts actuator shaft and raises valve stem on loss of air pressure.
Nominal Spring Range: (Table-1).
Start Point: Adjustable ±2 psi (14 kPa).
Maximum Air Pressure: 30 psig (207 kPa).
Ambient Temperature Limits:
Shipping, -40 to 220 °F (-40 to 104 °C). Operating, -20 to 220 °F (-29 to 104 °C).
Air Connections: 1/8 in. FNPT.
Valve Linkage: Order separately (Table-2). Locations: NEMA Type 1 only.
Mounting: In any upright position with actuator head above center line of valve body. Dimensions: 7-3/4 H x 10-1/2 W x 10-1/2 D in. (199 x 267 x 267 mm).
Table-1 Model Chart.
Model Number |
Nominal Spring Range* |
Nominal Stroke |
Valve Compatibility |
||||
psig |
kPa |
in. (mm.) |
VB-7xxx |
VB-8xxx |
VB-9xxx |
||
|
|||||||
MK-6601 |
3 to 8 |
21 to 55 |
|
1-1/2" to 2" |
— |
|
|
MK-6611 |
5 to 10 |
34 to 69 |
1/2 (13) |
(40 to 50 |
— |
— |
|
|
|
|
|
mm) |
|
|
|
MK-6621 |
8 to 13 |
55 to 90 |
|
— |
|
||
MK-6801 |
3 to 8 |
21 to 55 |
|
|
— |
2-1/2" to 4" |
|
MK-6811 |
5 to 10 |
34 to 69 |
1 (25) |
— |
2-1/2" to 5" |
(65 to 80 |
|
|
|
|
|
|
|
mm) |
|
MK-6821 |
8 to 13 |
55 to 90 |
|
|
— |
||
MK-6911 |
5 to 10 |
34 to 69 |
1-3/4 (44) |
— |
6" |
— |
|
*Nominal no load spring range based on normal stroke
Table-2 Valve Linkage.
Valve Linkage |
|
Valve Body Series |
||
AV-430 |
|
VB-7xxx |
1-1/2 in. to 2 in. (40 to 50 mm) |
|
AV-495 |
|
VB-9xxx |
2-1/2 in. to 4 in. (65 to 80 mm) |
|
AV-497 |
|
VB-8xxx |
2-1/2 in. to 6 in. |
|
ACCESSORIES |
|
|
|
|
AK-42309-500 |
Positive positioner and linkage |
|
|
|
TOOL-75 |
Spring compression tool |
|
|
|
TOOL-95 |
Pneumatic calibration tool kit |
|
|
|
MK-6600 Series |
|
|
|
|
PNV-245-013 |
3 to 8 psig green spring |
|
|
|
PNV-245-015 |
5 to 10 psig black spring |
|
|
|
PNV-245-018 |
8 to 13 psig blue spring |
|
|
|
MK-6700 and MK-6800 Series |
|
|
||
PNV-245-103 |
3 to 8 psig green spring |
|
|
|
PNV-245-105 |
5 to 10 psig black spring |
|
|
|
PNV-245-108 |
8 to 13 psig blue spring |
|
|
|
MK-6900 Series |
|
|
|
|
PNV-245-145 |
5 to 10 psig black spring |
|
|
|
PNV-245-148 |
8 to 13 psig blue spring |
|
|
|
All Series |
|
|
|
|
PNV-202 |
Diaphragm |
|
|
|
2 |
© Copyright 2010 Schneider Electric All Rights Reserved. |
F-13895-13 |
INSTALLATION Inspection
Inspect the package for damage. If damaged, notify the appropriate carrier immediately. If undamaged, open the package and inspect the device for obvious damage. Return damaged products.
Requirements
•
•
•
Piping diagrams.
Tools (not provided): Appropriate wrenches for mounting bolts and adjustments. Training: Installer must be a qualified, experienced technician or fitter.
C A U T I O N
•
•
•
Make all connections in accordance with the piping diagram.
Avoid locations where excessive moisture, corrosive fumes, or vibration are present.
The actuator can be mounted in any position above the centerline of the valve body. When selecting a location, allow sufficient room for accessories and for service of the product.
Mounting
The actuator may be shipped assembled to a valve body or as a separate component. These instructions are intended for use where the actuator is to be installed to a linkage and valve body, as a replacement unit, or when the actuator must be removed during valve installation.
Spring
Retainer
Plate
Actuator to Yoke
Mounting Bolts (2)
Brass Hex Nut
for adjusting
start point
Mounting
Bracket
Bracket Nut
Figure-1 Typical Pneumatic Valve Assembly with MK-6xxx Series Actuator.
F-13895-13 |
© Copyright 2010 Schneider Electric All Rights Reserved. |
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