Raymarine ST5000+, Руководство пользователя

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Chapter 5: Installation
65
Two line pressurised system
A two line pressurised system has an external pressurised reservoir to
reduce the chances of inducing air into the system. This also reduces
any sponginess due to pipe expansion.
The autopilot pump is connected to the system as shown below.
D272-2
Note:
A uniflow check valve
may be required if one is
not located in the helm
pump.
Three line system
In the three line system, hydraulic fluid flows in one direction only –
out of the helm pump to the ram and then returning from the other side
of the ram to the reservoir via a common return line.
A uniflow valve block will be fitted in the system. This ensures that the
return fluid from the ram is directed back to the reservoir.
The autopilot pump is connected to the system as shown.
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