Gate valve installation principles
The gate valve is placed at the bottom of the transducer dock. The gate valve must be mounted so that its top mating surface is in parallel with the sea surface during normal operating conditions.
Image
A Hoisting motor
B Motor Control Unit
C Gantry
D Transducer dock
E Transducer
F Gate valve
G Knee-plates (stiffeners)
H Mounting flange
The gate valve is bolted to a mounting flange designed and/or adapted to fit the hull plating. The transducer dock is bolted to the top of the gate valve. Two O-rings are used to make the construction water-tight.
The installation shipyard must adapt the mounting flange to fit the shape of the hull, or design and manufacture a custom mounting flange. Additional knee plates must be added to the final construction.
Note
The installation shipyard must provide all necessary design and installation drawings, as well as the relevant work standards and mounting procedures. If required, all drawings and documents must be approved by the vessel’s national registry and corresponding maritime authority and/or classification society. Such approval must be obtained before the installation can begin. The shipowner and shipyard doing the installation are responsible for obtaining and paying for such approval.
The gate valve is manufactured by LK Valves. Technical information about this unit is not included in this CS90 Installation Manual. Refer to the relevant end-user documentation provided by the manufacturer.
Important
The forces to which the gate valve, transducer dock and hull unit are exposed depends on the physical size of the complete installation, where it is located, and the vessel's behaviour in rough sea. It is very important that the entire installation is sufficiently supported, as the forces it is exposed to may affect both the physical installation and the vessel's safety. The mechanical support brackets must be designed and manufactured by the installation shipyard to fit the complete installation in the sonar room. We recommend that support brackets are placed pointing at minimum three directions with approximately 120 degrees between them. All calculations made to support the design must meet the applicable safety requirements, and apply to the physical properties of the hull and the installation.