Tank Quick Closing Valves
(a) Remote Operation Methods:
- Hydraulic or Pneumatic Activation: This method uses pressurized fluid (hydraulic) or air (pneumatic) to remotely close the valve. An activation signal triggers the release of pressurized fluid/air which pushes a piston within the valve, forcing it to shut.
- Wire Rope Release: A wire rope connects the valve to a remote release mechanism. Pulling the wire lever at the remote location activates a mechanism within the valve, causing it to close rapidly.
(b) Where they are Fitted:
Quick closing valves are typically fitted on the outlet line of tanks containing flammable liquids like fuel oil. This includes:
- Settling and service tanks within engine rooms.
- Tanks in the boiler room.
- Tanks supplying the emergency generator.
(c) Why They Are Fitted:
These valves are crucial safety features for several reasons:
- Emergency Shut-Off: In case of fire or other emergencies, the valve can be shut remotely to prevent the flow of flammable liquid to the fire, potentially stopping its spread.
- Isolation: The valve can isolate a leaking or ruptured tank, preventing further flow of liquid and minimizing damage.
- Remote Operation: Since emergencies can make the tank area inaccessible, remote operation allows shutting off the flow from a safe location.