Overview of Primary Product
Table Of Contents
- Application
- Features
- Applicable Literature
- SPECIFICATIONS
- INSTALLATION
- Mounting
- ADJUSTMENTS
- MAINTENANCE
- MAINTENANCE PARTS
- Figure-2 MK-46xx Maintenance Parts.
- 1. Disconnect air line to actuator.
- 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. Remove the four cover mounting screws, the top cover, and the diaphragm.
- 4. While holding down the piston with the heel of your hand, remove the connecting pin.
- 5. Slowly release pressure on piston and remove piston.
- 6. Remove spring and insert replacement.
- 7. Position piston over spring, making sure position indicator is aligned with guide.
- 8. Pushing down on piston, align holes in valve stem extension and piston shaft and insert connecting pin.
- 9. Position diaphragm and top cover on actuator and even secure with the four screws.
- 10. Refer to "ADJUSTMENTS" on page 4 and adjust start point of actuator to desired value.
- MK-46xx Series
- MK4-46xx Series
- MK-46xx Series
- MAINTENANCE PARTS
F-13894-7 © Copyright 2006 TAC All Rights Reserved. 5
MAINTENANCE
Regular maintenance of the total system is recommended to assure sustained performance.
MAINTENANCE PARTS
FIELD REPAIR
Replacing Actuator Diaphragm
W A R N I N G
Strong spring forces approaching 100 lbs. (45 kg) are present. Actuator must be
connected to valve body and piston connected to the valve stem in order to replace
the actuator diaphragm.
1. Disconnect air line to actuator.
2. Remove the four cover mounting screws and the top cover.
3. Remove the old diaphragm and install the replacement along with the top cover.
N O T E
Be sure diaphragm is properly positioned in housing groove before securing cover.
4. Secure assembly with four screws, drawing screws down tightly, but evenly, all around.
5. Reconnect air line.
Table-2 Maintenance Parts.
Item
No.
Part Number Description Actuator
1 PNV-002
a
a
PNV-251 diaphragm available for high temperature applications. Order separately and field install.
Diaphragm All
2
PNV-238 3-6 psig spring (brown) MK-4601
PNV-045-044 3-8 psig spring (black) MK-4601
PNV-045-044 5-10 psig spring (black) MK-4611
PNV-045-048 8-13 psig spring (light blue) MK-4621
PNV-239 10-13 psig spring (gray) MK-4621
PNV-050-043 3-13 psig spring (white) MK-4641
PNV-041-046 6-7 psig spring (red) MK-4681
b
b
Discontinued model.
PNV-232 10-11.25 psig spring (orange) MK-4621-422
Figure-2 MK-46xx Maintenance Parts.