(1) Check pipe threads for damage or corrosion.
(2) Check all threads of rupture disc assembly.
(3) Check for stripped or damaged head on cap.
(4) Check for dirty or clogged vent holes in cap.
(5) Check rupture disc for cracks, dents, or deep scratches.
(6) Check spacer for bending, cracks, or deformation.
e. Repair or Replace.
(1) Replace damaged cap.
(2) Replace damaged bushing.
(3) Replace damaged body.
(4) Replace damaged or broken rupture disc.
(5) Replace damaged spacer.
f. Installation. (Figure 294)
Apply thread sealant or Teflon tape to pipe threads before
(1) Install rupture disc (4) and spacer (3) in body (2).
(2) Install cap (1) in body (2).
(3) Install bushing (5) in pipe.
(4) Install rupture disc assembly (6) in bushing (5).
2-80. PULSE DAMPENER.
a. General. The pulse dampener is located between the R.O. pump and the R.O. vessels. It is used to
eliminate water pressure pulsing from the R.O. pump, thus allowing steady water pressure to the R.O. vessels.
This paragraph describes removal, cleaning, inspection, repair, and installation of the pulse dampener.
b. Removal. (Figure 2-95)
ROWPU piping and equipment can contain extremely high
pressure during and after operation. If this pressure is not
relieved before working on these pipes or equipment, serious
injury or death can occur. Be sure to open all drains and vents
before beginning any disassembly.
(1) Unscrew three pipe unions (1) (ARMY), two pipe unions (1) (USMC), and one pipe union (14)
(USMC), on pipes from R.O. pump to R.O. vessels and to vent vessels valve.
(2) Remove automatic pressure relief valve (2) in accordance with paragraph 2-78.
(3) (USMC) Remove union (14) with pipe assembly (15).
(4) Remove pipe assembly (3) from pipe assembly (12) that connects to pulse dampener (11).
(5) Unscrew coupling nut and disconnect drain (4) from piping assembly (12) under automatic pressure
(6) Unscrew and disconnect two coupling nuts (5) from two adapters (16).