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Air bottle or Air receiver On board Ship

MAY 17, 2011 BY MOHIT

Main engine and auxiliary engine are the two prime components in a ship’s engine room, on which,the entire operation of the vessel is dependent. There are several other important machineries thatare necessary to support these two main components; however, one equipment without which anyof the above mentioned machines cannot do away with is an air bottle or air receiver.

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What is an Air bottle or Receiver?

The air bottle or air receiver is a large container acting as a reservoir to store compressed airsupplied by the main air compressor of the ship at high pressure. This compressed air is veryimportant to start main engine or auxiliary engine.

Purpose of Air Bottle

The high pressure is used for initial starting of the marine I.C engines present onboard vessel.

Navy Air/GasCompressors

Quality, durable shipboard aircompressors & nitrogen

generators

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It also supplies control air to the marine engines.

Service air is supplied from the air bottle.

If the quick closing valves are air operated, safety air is supplied through air bottle.

Spring air for exhaust valve is supplied through air bottle.

Apart from above mentioned ones, there are several other uses as well.

What are the Air Bottle Mountings and Connections?

The general mountings and connection present on air bottle of a ship are:

Filling valve: This is a valve fitted in the supply connection from main air compressor to the airbottle.

Outlet to Main engine: An outlet valve and pipe is fitted for connection from air bottle to mainengine for supplying air during starting.

Outlet to auxiliary engine: An outlet valve and pipe is fitted for connection from air bottle toauxiliary engines for supplying air during starting.

Auxiliary connection: Other auxiliary supplies connections such as service air, safety air etc. isalso provided with isolating valve.

Relief valve: A relief valve is fitted on the air bottle to relieve excess pressure inside the bottle.

Drain valve: A drain valve is fitted at the bottom of the bottle to drain accumulated condensatefrom the receiver.

Fusible plug: A fusible plug is fitted in the bottle with a separate connection leading out of theengine room so that in the event of fire, this plug will melt and relieve all the air to the outsideatmosphere.

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Manhole door: A manhole door is fitted in the bottle to carry out inspection of the same.

You may also like to read­Different Parts of a Marine Air Compressor used on Ship

References:

Book on Marine Aux. Machinery by H.D.McGeorge

Image Credits:

Made­in­china

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About MohitMohit Kaushik is a marine engineer sailing with Maersk Shipping. He handles websitedevelopment and technical support at Marine Insight. Apart from handling web developmentprojects, he also manages a logistics company and have a keen interest in modern logistictechnologies .

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Yatharth saysJune 25, 2011 at 8:45 am

Sir,what is the pressure of air in air bottles

Neeraj Kumar saysJuly 17, 2011 at 6:29 am

what are the ways to test an air bottle for leakage ?

and why is the end piece tapperd before its welded to the shell ?

Terence Marshall saysJuly 31, 2014 at 11:31 am

if serious corrosion is detected in a starting air receiver and that receiver must be usedexplain how would determine the maximum pressure

Steven saysSeptember 21, 2014 at 11:08 am

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POST COMMENT

Hi there my question is other that the access door being easy to access by the orientationof the door being at 3 o’clock and 9 o’clock, is there another reason for the door beingorientated along the horizontal plane?

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