Simrad SC90, Installation Manual

Page: 117 / 544

419050/B
115
5 Attach the nuts and washers while the gate valve is still suspended.
Due to the limited space, it may be difficult to enter and/or tighten some of the nuts.
An alternative is then to use Loctite 270 or similar.
6 Lubricate the threads with a high grade commercial anti-seize lubricant.
7 Lower the valve carefully onto the mounting flange while tightening the nuts.
8 Verify that the valve is orientated and aligned correctly.
9 Disconnect and remove the tackles from the gate valve.
10 Tighten the nuts to torque 472 Nm.
Installing the transducer dock
The transducer dock is mounted on the top of the gate valve. The top mating surface
is in parallel with the sea surface during normal operating conditions. The transducer
dock protects the transducer when the SC90 is not used.
Prerequisites
This task must take place in dry dock. The shipyard must provide all necessary tools and
manpower. The following specific items are required for this task:
• Silicone grease
• Anti-seize lubricant
• Torque wrench
• Lifting arrangement
• O-ring
• Mounting hardware
It is assumed that the gate valve has been installed.
Note
The transducer dock is heavy. Always use appropriate lifting equipment to minimize risk
of personnel injury or equipment damages. Only certified equipment must be used.
Context
The transducer dock can be supplied by Kongsberg Maritime. Alternatively, you can
design and manufacture a custom transducer dock.
Only the basic steps of the task are offered. Additional procedures with more information
and/or details must be provided by the installation shipyard to fit the vessel properties.
• The top mating surface of the gate valve must be protected with a wooden cover at
all times until the transducer dock is installed. It is very important that this surface
Installing the optional gate valve DN500