Reciprocating pump full details and comparison with centrifugal pump.

Reciprocating pump

 full details and 

comparison with 

centrifugal pump.

RECIPROCATING PUMPS

1. What is a reciprocating pump ? 2.main parts of reciprocating pumps. 3. Working of reciprocating pumps. 4. Classification of reciprocating pumps. 5 use of air vessels in reciprocating pump 6. Difference between centrifugal and reciprocating pump 7.Applications of reciprocating pumps. 8.Benefits of reciprocating pumps. 9.drawbacks of reciprocating pump. 10.conclusion.

What is a reciprocating pump ?

 If the mechanical mechanical energy is converted into hydraulic energy (or pressure energy) by suction of fluid into cylinder in which a piston is reciprocating (moving backwards and forwards)  which exerts The thrust on the liquid and increases its hydraulic energy (pressure energy) the pump is  known as reciprocating pump.

2.main parts of reciprocating pumps.

i ). A cylinder with piston,piston rod,connecting rod and a crank .

ii).Suction pipe

iii).Delivery pipe

iv).Suction valve

v).Delivery valve

                   Sketch

3.Working of Reciprocating pump

Single action reciprocating pump ,which consists of a piston which moves forward and backward in a close fitting cylinder. The movement of the piston is obtained by connecting the Piston rod to the crank by means of a connecting rod . The crank is rotated by means of an electric motor. Suction and delivery pipes with suction valves and delivery valves are connected to the cylinder .The suction and delivery valves are connected to the cylinder and these valves are one-way valves are non-return valves which allow the water to flow in One Direction only.

4.Classification of Reciprocating pumps

The Reciprocating pumps may be classified as

1.According to the water being in contact with one side or both sides of the piston.

2.According to the number of cylinders provided.

A.single cylinder pump

B.Double cylinder pump

C.Triple cylinder pump

3.According to the contact of water is:

A.single acting pump

B.double acting pump.

5.Use of air vessels in Reciprocating pumps.

 An air vessel is  a closed chamber containing compressed air  in the top portion and liquid (or water ) at the bottom of the chamber . At the base of the chamber there is an opening through which the liquid (or water ) may flow into the vessel or out from the vessel . when the liquid enters the air vessels,  the air gets compressed further and when the liquid flows  out the vessel, the air will expand in the chamber

 An Air vessel is fitted to the suction Pipe and to the delivery type at a point close to the cylinder of a single acting reciprocating pump:

1. To obtain a continuously supply of liquid at a uniform rate 

2.To save a considerable amount of work in overcoming the frictional resistance in the suction and delivery pipe.

 3.To run the pump at high speed without separation.

6.Difference between centrifugal and Reciprocating pump.

S.No.	CENTRIFUGAL PUMP	RECIPROCATING PUMP
1.	It's speed is high	This is low speed pump.
2.	It has lower efficiency at high heads and greater efficiency at low heads.	It has lower efficiency at smaller heads and high efficiency at higher heads..
3.	It is suitable for low head and large discharge.	It is suitable for creating higher heads and smaller discharge.
4.	It can pump dirty water also.	It can pump clear water only
5.	It is compact and occupies less space	This requires more space..
6.	It's initial cost is less.	It's initial cost is high..
7.	It's maintenance cost is less.	Maintenance cost is more due to wear and tear
8.	Needs priming.	Does not need priming.
9.	Air vessels are not required.	Air vessels are required.
10.	Operation is quite simple.	Much more required in operation

7.Applications of reciprocating pumps

Piston pump,bucket pump,plunger pump all are reciprocating pump.

1)The lubricating pump could also be a reciprocating pump and it supplies the lubrication oil to the foremost engine.

2)Main pump is additionally a reciprocating pump.

3)For ballast they're sometimes used.

8.Benefits of reciprocating pumps.

1)Gives high at outlet.

2)Gives high suction lift.

3)Priming isn't required during this pump.

4)They are used for air also.

9.drawbacks of reciprocating pump

1)High wear and tear, so requires tons maintenance.

2)The flow isn't uniform, so we've to suit a bottle at both ends.

3)The flow is extremely less and cannot be used for top flow operations.

4)More heavy and hulking in shape.

5)Initial cost is far more during this pump.

10.conclusion

There is little question that these pumps are best when it involves providing us with high . But as we have seen that there are many maintenances which are required during this pump. So we'll say these pumps are utilised in places where there is a selected purpose for them to be used. So this was all about the reciprocating pump.

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