Brochure

MK-2690
Pneumatic Valve Actuator
Model Chart
Specifications
Accessories
For proportional pneumatic control of 1/2 in. to 2 in.
VB-7xxx Series valves (subject to close-off ratings)
and discontinued 1/2 in. to 1-1/4 in. VB-9xxx valves.
Features:
• Compact size with 6 in.
2
(39 cm
2
) effective area.
• Rugged die cast aluminum housing.
• Replaceable beaded molded neoprene diaphragm.
Model No.
Nominal Spring Range
a
(Spring Color Code)
a
Nominal (no load) condition, spring ranges based on 1/2 in. (13 mm) maximum stroke, provided by AV-7400 or AV-400 linkage (order separately).
psig kPa
MK-2690
3 to 7 (Yellow) 21 to 48
5 to 10 (Black) 34 to 69
8 to 13 (Blue) 55 to 90
Inputs Compatible with Proportional pneumatic signal. Refer to Model Chart.
Start point Non-adjustable.
Air connections 1/8 in. FNPT located on side of housing.
Mechanical Outputs
Stroke 1/2 in. (12.6 mm) nominal.
Environment
Ambient temperature limits
Shipping: -40 to 220qF (-40 to 104qC).
Operating: -20 to 220qF (-29 to 104qC).
Humidity 5 to 95% RH, non-condensing.
Maximum air pressure 30 psig (207 kPa).
Spring
Stainless steel spring retracts actuator shaft and raises valve stem on loss of air pressure. Springs
provided in AV-400 or AV-7400 linkage (order separately).
Dimensions 3-9/16 H x 5 W x 2-1/4 D in. (90 x 127 x 57 mm).
Model No. Description
AK-42309-500 Positive positioner and linkage.
AV-400 Valve linkage (includes parts for VB-7xxx and discontinued 1/2 to1-1/4 in. VB-9xxx valves).
AV-7400 Valve linkage for VB-7xxx valves only.
TOOL-095-1 Pneumatic calibration tool kit.
Maintenance Parts
PNV-144-43 3 to 7 psig spring.
PNV-145-44 5 to 10 psig spring.
PNV-145-43 8 to 13 psig spring.
PNV-102-1 Diaphragm.
PNV-104-2 Piston.
MK
-
269
F-27383-1 © Copyright 2006 TAC. All Rights Reserved. 47