Simrad SC90, Installation Manual

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419050/B
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7 Lower the transducer dock carefully onto the gate valve while tightening the nuts.
8 Disconnect and remove the tackles from the transducer dock.
9 Tighten the nuts to torque 472 Nm.
10 Depending on mechanical support provided by the existing decks and/or bulkheads,
design, manufacture an install additional mechanical support for the transducer
dock.
The necessity of such mechanical support must be decided by a naval architect.
Installing the hydraulic units
If a hydraulic system has been chosen to control the gate valve operation, additional
units must be installed.
Prerequisites
You must be equipped with a standard set of tools. This tool set must comprise the
normal tools for mechanical tasks. This includes different screwdriver types, pliers,
adjustable spanners etc. Each tool must be provided in various sizes. We recommend
that all tools are demagnetized to protect your equipment. Depending on the tasks at
hand, additional tools may be required.
Context
On a manually operated gate valve, a wheel is used to open and close the valve. The
wheel is fitted on gate valve, which means that you need to go down to the bottom of the
vessel to operate it. On a hydraulic operated gate valve, the control wheel is replaced
with a hydraulic motor. The hydraulic system comprises the following units:
• Hydraulic Power Pack
The Hydraulic Power Pack provides the oil pressure for the hydraulic motor on the
gate valve.
• Gate Valve Control Unit
The Gate Valve Control Unit provides local control of the Hydraulic Power Pack. It
contains controllers to operate the entire gate valve system.
• Remote Control Unit (Optional)
The Remote Control Unit allows you to operate the gate valve from another position
on the vessel. The Remote Control Unit is normally placed on the bridge.
A control cable connects the hydraulic gate valve and the Gate Valve Control Unit to
the Motor Control Unit.
The gate valve and the hydraulic units are manufactured by LK Valves. Refer to the
relevant end-user documentation provided by the manufacturer.
Installing the optional gate valve DN350