5.2.1 For vessels
with non-duplicated actuators, isolating valves are to be fitted at
the connection of pipes to the actuator, and are to be directly fitted
on the actuator.
5.2.2 Arrangements
for bleeding air from the hydraulic system are to be provided, where
necessary.
5.2.3 Relief
valves are to be fitted to any part of the hydraulic system which
can be isolated and in which pressure can be generated from the power
source or from external forces. The settings of the relief valves
is not to exceed the design pressure. The valves are to be of adequate
size and so arranged as to avoid an undue rise in pressure above the
design pressure.
5.2.4 Relief
valves for protecting any part of the hydraulic system which can be
isolated, as required by Pt 14, Ch 1, 5.2 Valve and relief valve arrangements 5.2.3 are
to comply with the following:
-
The setting pressure
is not to be less than 1,25 times the maximum working pressure.
-
The minimum discharge
capacity of the relief valve(s) is not to be less than 110 per cent
of the total capacity of the pumps which can deliver through it (them).
Under such conditions the rise in pressure is not to exceed
10 per cent of the setting pressure. In this regard, due consideration
is to be given to extreme foreseen ambient conditions in respect of
oil viscosity.