Correct Answer - Option 2 : Impeller
Explanation:
Reciprocating pumps
- It is a positive displacement pump where a certain volume of liquid is collected in an enclosed volume and is discharged using pressure to the required application.
- Reciprocating pumps are more suitable for low volumes of flow at high pressures.
Important components in reciprocating pump and their significance:
|
Component
|
Significance
|
| Air vessel |
- An air vessel is a cast-iron closed chamber having an opening at its base through which the water flows into the vessel or from the vessel.
- The purpose of using the air vessel to obtain a uniform discharge from the reciprocating pump.
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Delivery valve
|
- Delivery valve also non-return valve placed between the cylinder and delivery pipe outlet.
- It is in the closed position during suction.
- It is in opened position during discharging of liquid.
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Suction valve
|
- A suction valve is a non-return valve which means the only one-directional flow is possible in this type of valve.
- This is placed between the suction pipe inlet and cylinder.
- During suction of liquid, it is opened and during discharge, it is closed.
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Draft tube
|
- It is a diverging tube fitted at the exit.
- It is used to convert kinetic energy into pressure energy.
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Other components of a reciprocating pump are as follows:
1). Cylinder
2). Piston and Piston Rod
3). Crank and Connecting Rod
4). Strainer
