Overview of Primary Product

ManualsBrandsBarber Colman ManualsActuator Accessories5-10 PSI Spring for MK-4611

Table Of Contents

TAC

1354 Clifford Avenue

P. O. Box 2940

Loves Park, IL 61132-2940

www.tac.com

Application

These valve actuators, with an 11 sq. in. (71 cm

)

effective diaphragm area, are used with TAC VB-7xxx

series valves for proportional pneumatic control of hot

water or chilled water valves.

The MK-46xx and MK4-46xx Series may also be

mounted on discontinued 1/2" through 1-1/4" TAC

VB-111, VB-131, VB-314, and VB-9xxx series valves.

Features

• Rugged die cast aluminum housing

• Replaceable beaded molded neoprene diaphragm

• Built-in spring to retract output shaft on loss of air

pressure

• Adjustable start point

• Multiple spring ranges for various applications

• 1/2" nominal stroke

Applicable Literature

• TAC Valve Products Catalog, F-27384

• TAC Cross-Reference Guide, F-23638

• TAC Reference Manual, F-21683

• TAC Application Manual, F-21335

• AK-42309-500 Positive Positioner Pneumatic Relay

General Instructions, F-22909

• AV-401 Linkage General Instructions, F-25586

• VB-7211 Valve Body General Instructions, F-24380

• VB-7212 Valve Body General Instructions, F-24381

• VB-7213 Valve Body General Instructions, F-26075

• VB-7214 Valve Body General Instructions, F-25675

• VB-7215 Valve Body General Instructions, F-26077

• VB-7221 Valve Body General Instructions, F-24384

• VB-7222 Valve Body General Instructions, F-24385

• VB-7223 Valve Body General Instructions, F-26073

MK-46xx Series

MK4-46xx Series

Pneumatic Valve Actuators

General Instructions

• VB-7224 Valve Body General Instructions, F-24387

• VB-7225 Valve Body General Instructions, F-26079

• VB-7253 Valve Body General Instructions, F-24388

• VB-7263 Valve Body General Instructions, F-24389

• VB-7273 Valve Body General Instructions, F-24390

• VB-7283 Valve Body General Instructions, F-24391

• VB-7312 Valve Body General Instructions, F-24392

• VB-7313 Valve Body General Instructions, F-26074

• VB-7314 Valve Body General Instructions, F-24394

• VB-7315 Valve Body General Instructions, F-26078

• VB-7323 Valve Body General Instructions, F-26076

• VB-7332 Valve Body General Instructions, F-24396

MK-46xx Series

Summary of content (8 pages)

PAGE 1
MK-46xx Series MK4-46xx Series TAC 1354 Clifford Avenue P. O. Box 2940 Loves Park, IL 61132-2940 www.tac.com Pneumatic Valve Actuators General Instructions Application These valve actuators, with an 11 sq. in. (71 cm2) effective diaphragm area, are used with TAC VB-7xxx series valves for proportional pneumatic control of hot water or chilled water valves. The MK-46xx and MK4-46xx Series may also be mounted on discontinued 1/2" through 1-1/4" TAC VB-111, VB-131, VB-314, and VB-9xxx series valves.
PAGE 2
SPECIFICATIONS Construction: Housing, Die cast aluminum. Diaphragm, Replaceable beaded molded neoprene. Stroke: (Table-1). Effective Area: 11 sq. in. (71 cm 2). Spring: Retracts actuator shaft and raises valve stem on loss of air pressure. Nominal Spring Range: (Table-1). Start Point: MK-4601, MK-4621:Adjustable +1/-2 psi (+7/-14 kPa). MK-4611, MK-4641: ±2 psig (±14 kPa) MK-4621-422: 10 psig (69 kPa) Maximum Air Pressure: 30 psig (207 kPa).
PAGE 3
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. Appropriate valve body. Appropriate accessories. Training: Installer must be a qualified, experienced technician or fitter.
PAGE 4
Removing Actuator from Valve Body (Figure-1 ) 1. Pull connecting pin to release valve stem from actuator piston. NOTE A slight amount of air pressure applied to the actuator may be necessary to relieve binding on the connecting pin.The TOOL-85 manual hand pump valve (included in TOOL-95-1) may be used for this purpose. 2. Disconnect air supply to the actuator. 3. Loosen mounting nut. 4. Lift actuator until it clears the valve. Installing Actuator on Valve Body (Figure-1 ) 1.
PAGE 5
MAINTENANCE Regular maintenance of the total system is recommended to assure sustained performance. MAINTENANCE PARTS Figure-2 MK-46xx Maintenance Parts. Table-2 Maintenance Parts. Item No.
PAGE 6
Replacing Actuator Spring WARNING Strong spring forces approaching 100 lbs. (45 kg) are present. Follow the following procedure in order to prevent injury when removing the top cover. Actuator must be connected to valve body and piston connected to the valve stem in order to replace the spring. 1. Disconnect air line to actuator. 2. Rotate start point adjustment counterclockwise (as viewed from the bottom) to remove as much spring compression as possible. 3.
PAGE 8
Copyright 2006, TAC All brand names, trademarks and registered trademarks are the property of their respective owners. Information contained within this document is subject to change without notice. TAC 1354 Clifford Avenue P.O. Box 2940 Loves Park, IL 61132-2940 F-13894-7 www.tac.