SERVICE MANUAL
Page 515
CHAPTER 5
9107
May/12
CHAPTER 5
Page 515
Feb/11
283
SERVICE MANUAL
ISO 9650
4.5 Arch tube transfer valve test
4.5.1 After the upper buoyancy tube has been deflated completely, the
arch tube transfer valve can be tested.
(a) After 30 minutes the arch tube should maintain its full shape.
Transfer valves which do not hold air must be replaced, (FIGURE
504).
(b) If the arch tube does not maintain its full shape, look for leaks
and porous fabric. If possible, repair the liferaft within the limits
given, refer to Chapter 6.
4.6 Pressure relief valves test
Test the relief valves as follows:
4.6.1 Install the caps on the pressure relief valves, (PRV) (FIGURE 504).
4.6.2 Connect the manometer to the liferaft (refer to FIGURE 501).
4.6.3 Inflate the liferaft to 1
1
/
2
times normal working pressure.
4.6.4 Remove the caps from the relief valves.
4.6.5 Make sure the valves open and release the excess pressure
immediately, (FIGURE 505). After 30 minutes recheck the PRVs. The
indicated pressure on the manometer when the valves are closed
must not be:
(a) THROWOVER; less than 1970 mmWG / 2.8 Psi.
NOTE:
Any valves which do not close correctly, must be
replaced (Refer to Chapter 6).
