ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
0066 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
GENERAL MAINTENANCE
Actuator (with a Pneumatic Positioner) Replacement:
Parts (TM 10-4610-309-24P):
Actuator P/N MRP-004U-K-S081
Figure 7874, Pneumatic Positioner
Equipment Condition:
TWPS in Standby Shutdown with Drain-Down
Replace the actuator with figure 7874 pneumatic positioner that are mounted on Valve V-202 as follows:
1.
Make sure the TWPS is in Standby Shutdown with Drain-Down. Refer to WP 0017.
2.
Tag and disconnect the air tubes from the pneumatic position indicator and actuator.
3.
Remove the butterfly valve assembly. Refer to Butterfly Valve Replacement.
4.
Remove the actuator from the butterfly valve. Refer to Butterfly Valve Replacement.
5.
Remove the positioner from the actuator as follows (see Figure 14):
a. Remove the 4 screws from the cover of the pneumatic positioner and remove the cover.
b. Remove the 4 screws and washers inside that positioner that secure the positioner to the
actuator.
c. Remove the old pneumatic positioner and the positioner shaft adapter and adapter
sleeve from the actuator.
PORT S
COVER SCREW
COVER
SCREWS AND WASHERS
PORT C2
AIR TUBE FROM
100 PSIG SOURCE
PNEUMATIC POSITIONER
ADAPTER SLEEVE
PORT I
POSITIONER SHAFT ADAPTER
3-15 PSIG AIR TUBE
FROM FEED FLOW
TO PORT C2
CONTROL PANEL
PORT A
Figure 14. Pneumatic Positioner and Actuator.
0066 00-15
