Gate valve system description
The gate valve can either be manually operated, or controlled by a hydraulic system. On the manual type, a hand operated wheel is used to open and close the valve. On the hydraulic version, a single button does the same job.
Manually operated gate valve
Image
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.
The gate valve is fitted with end switches. These are connected to the Motor Control Unit on the Hull Unit. This interface prevents the transducer to be lowered while the gate valve is closed. It does not prevent the gate valve from closing when the transducer is lowered.
Hydraulic operated gate valve
On a hydraulic operated gate valve, the control wheel is replaced with a hydraulic motor.
Image
A Gate valve
B Hydraulic Actuator
C Hydraulic Power Pack
The Hydraulic Power Pack provides the oil pressure for the hydraulic motor on the gate valve.
D 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.
E Remote Control Unit
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.
F A control cable connects the hydraulic gate valve and the Gate Valve Control Unit to the Motor Control Unit.