User Guide

ManualsBrandsBarber Colman ManualsHVAC Replacement PartsLinkage Kit for 1/2" to 2" VB7 and 1/2" to 1-1/4" VB9

Table-5 Actuator Shaft and Cam Position.

6. Place the plunger cam in the plunger and slip the plunger cam onto the actuator shaft

with the cam pointing down. Consult Table-6 for the proper cam.

Table-6 Cam Selection.

7. Push the valve stem completely down against the lower valve seat.

8. Screw the stem extension until the holes in the stem extension and plunger line up.

9. Turn the stem extension upward, counterclockwise, into the plunger 2 full turns for 1/2"

to 2" valves and 1-1/2 turns for 2-1/2" to 4" valves.

10. Raise the actuator up until the connecting pin can be inserted through the holes in the

plunger and stem extension.

11. Tighten the actuator mounting screws.

12. Tighten the lock nut against the stem extension.

13. Place the front cover over the plunger assembly and fasten it to the actuator with two

self-tapping screws.

14. Install the position indicator to the end of the actuator shaft, pointing to “Closed”.

Actuator

Shaft

Position

Standard Factory Positions of Cam

except for Normally Closed Valves

w/MA-3XX and MA-4XX Actuators

Optional Cam Position Used to Reverse

Control Action (Standard for Normally

Closed Valves w/MA-3XX and MA-4XX)

Short tooth on

actuator shaft

at 9:00

CCW

Short tooth on

actuator shaft

at 3:00

Cam Down

Cam Up

Cam Down

Use Cam

Marked

Included in Linkage Kits For These Valve Bodies

With

Nominal

Stroke

“7”

AV-91, AV-391, AV-93, AV-393

1/2" to 1-1/4" Obs. VB-9XXX

1/2"

“77” 1/2" to 2" VB-7XXX

“44-2”

AV-92, AV-392, AV-394, AV-395, AV-

396

2-1/2" to 4" VB-9XXX

1-1/2" & 2" Obs. VB-9XXX