TM 5-4220-227-14
5-10. Ball Valve 3/4 Inch (Pressure Relief Valve Assembly).
This task covers:
a.
Replace
b.
Repair
INITIAL SETUP:
Tools
Materials/Parts (Cont)
General Mechanic's Tool Kit
Detergent, Nonionic (Item 8, Appendix E)
(NSN 5180-00-177-7033)
Distilled Water (Item 9, Appendix E)
Cloth, Lint-Free (Item 6, Appendix E)
Materials/Parts
Tape, Teflon (Item 21, Appendix E)
Ball Valve 3/4 Inch
Equipment Condition
Valve Kit
Packing
Chamber shut down (para. 2-15).
Bands, Rubber (Item 4, Appendix E)
Pressure relief valve removed (para. 5-9).
Bags, Plastic (Item 3, Appendix E)
a. Replace. (figure 5-6)
WARNING
To prevent the spread of disease, serious injury and/or death, oxygen breathing systems
must be maintained hygienically clean and free from dust, dirt, and all hydrocarbon
contamination. Refer to oxygen system prework procedures para. 4-10 to avoid violating
this warning.
(1) Remove ball valve (1) from nipple (2).
WARNING
Leave 1 1/2 threads exposed on fitting when applying teflon tape. This will ensure that
no teflon tape will hang down inside the air system. Teflon tape should be wrapped in
such a manner that when the fitting is tightened the tape will not loosen. Failure to wrap
teflon tape correctly may result in contamination or blockage of the air system and
subsequent possible injury or death to the diver.
(2) Apply teflon tape to all pipe threads .
(3) Install ball valve (1) on nipple (2).
5-16
