What is an air vessel in a reciprocating pump ?

What is an air vessel in a reciprocating pump

What is an air vessel in a reciprocating pump

 

What is an air vessel in a reciprocating pump and what is the purpose of air vessel?

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The air vessel, in a reciprocating pump, is a cast iron closed chamber having an opening at its base. Also, these are fitted to the suction pipe and delivery pipe close to the cylinder of the pump. The vessels are used for the following purposes:

(a) To get continuous supply of liquid at a uniform rate.

(b) To save the power required to drive the pump. This is due to the fact that by using air vessels, the acceleration and friction heads are reduced. Thus the work is also reduced.

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It may be noted that by fitting an air vessel to the reciprocating pump, the saving of work and subsequently the power is about 84.8 % in case of a single acting reciprocating pump and 39.2 % in case of double acting reciprocating pump.

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