4-48. SAFETY VALVE. This task covers:
Tools, see Appx B, Sec Ill, Ref Code (No.):
Tool Kit, General Mechanics (1)
ROWPU shutdown. Air pressure zero.
Pipe Wrench (2)
General Safety Instructions:
Tape, Antiseize (Appx E, Sec II, Item 67)
Preformed Packings (TM 10-4610-232-24P)
Observe specific Warning in text.
Make certain pressure is relieved from tubing. Close the air supply valve and open
vent valves on air manifolds. Wait until air pressure gages read zero.
Disconnect air line (1, Figure 4-54) by loosening compression nut (2).
Loosen nut (9) and remove valve assembly from piping.
Remove nipple (10), split ring (11) and preformed packing (12) from valve assembly (13).
Figure 4-54. Safety Relief Valve