What is quick closing valve?
Quick closing valves are fitted to oil tanks so that in the event of a fire they can be safely closed from a remote location to stop the supply of fuel to the fire. These valves may be operated remotely by pull wires, hydraulics, compressed air, etc.
What is self closing valve?
Self-closing valves usually have a spring return mechanism or have a counterweighted lever. Used in applications where a positive return to the shut-off position is required after the valve is manually opened.
What type of valves are used for quick closing valve?
A pneumatic cylinder with piston is fitted in the quick closing valve housing which operates the spring to close the valve.
Where is quick closing valve used?
A quick closing valve is an important part of the engine room fire fighting system. During emergencies, it cuts off one of the main sources of fire prominently present in the engine room – fuel oil. The quick closing valves are installed in all fuel tanks in the engine room.
How do you close a quick closing valve?
To shut a group quick closing valve for tank system, operate/ push/ open the air valve for that quick closing valve. This will supply the air to the piston instead of venting which closes the quick closing valve.
What is the function of butterfly valve?
A butterfly valve regulates flow by starting, slowing, or stopping media. The disk opens and closes with a low-torque rotation of 90 degrees and works for any compatible application. Because they cost less and are lighter weight, the butterfly valve is often preferred over other types of valves.
What is difference between gate valve and ball valve?
The main difference is in the operation. A gate valve moves a solid disk up and down to open/close the orifice. A ball valve rotates a ball (the orifice) with a bore in it 90 degrees to open/close the valve.
What are butterfly valves made of?
Body material – the material from which the valve body is constructed, such as iron, stainless steel, aluminum, carbon steel, PVC, or PCVC. Disk material – the material used for the valve disk. Liner material – for lined butterfly valves, the material used as the lining or coating, such as rubber, PFA, or PTFE.