For more information, see Replace the actuator diaphragm and spring for proper mode of operation
(fail open, fail close, or double acting) in this manual.
5.
Withdraw the valve diaphragm, compressor, and spindle assembly from the bonnet.
6.
Replace the o-rings and lubricate the new o-rings.
For more information, see Lubrication requirements in this manual.
7.
Replace the valve diaphragm, compressor, and spindle assembly on the bonnet. Care must be
used on the Bio-Tek to align the compressor T-slot with molded tabs in lower cover.
8.
Reassemble the actuator.
For more information, see Replace the actuator diaphragm and spring for proper mode of operation
(fail open, fail close, or double acting) in this manual.
9.
Reassemble the valve.
10. Reconnect the air lines.
11. If the actuator mode of operation is fail open or double acting, then follow the steps below:
a) Examine the actuator upper cover for leakage past the indicating spindle o-ring seal.
b) If leakage is present, then replace the spindle o-rings.
3.9 Lubrication requirements
Lubrication schedule
Remove residual grease prior to re-lubrication. Lubricate the spindle, o-rings, and mating surfaces when-
ever the topworks is disassembled.
Acceptable lubricants
Brand
Lubricant type
Chevron FM ALC EP 2 (FDA Compliant)
Fuchs
Cassida FM CSC EP2 (FDA Compliant)
3.10 Replace the actuator diaphragm and spring for fail open
actuator
One fixture exists for the series 3, 5, and 8 actuators and one for the series 16 actuator.
CAUTION:
Actuator plates are under load. Series 3, 5, 8, and 16 fail open actuators contain powerful
springs and should not be disassembled unless using ITT approved fixturing and fixturing
methods.
1.
If present, remove the switch package.
2.
Disconnect the air lines.
3.
ITT recommends that the following steps be performed on a bench with the body removed from the
actuator:
a) Disassemble the valve.
For more information, see Disassemble the valve in this manual.
b) Unscrew the diaphragm from the compressor by turning it counterclockwise.
4.
Remove the actuator fasteners and lift off the top cover.
5.
Disassemble the actuator with a fixture:
a) Place the actuator in a fixture.
b) Loosen the indicator spindle two turns.
3.9 Lubrication requirements
12
Advantage® 2.1 Actuator Maintenance Manual
