On what principle does a reciprocating pump work?

A reciprocating pump is a positive displacement pump that operates by sucking and raising the liquid through the action of a piston or plunger, which moves in a reciprocating motion within a closely fitted cylinder.

• Key Features:
• Positive Displacement:
• The pump displaces the liquid by the movement of the piston or plunger, and the amount of liquid pumped is equal to the volume displaced by the piston.
• Application:
• Reciprocating pumps are best suited for applications requiring relatively small capacities and high heads.
• Types of Reciprocating Pumps:
• Single-Acting Reciprocating Pump:
• Operation:
• This type of pump has one suction valve and one discharge valve.
• When the piston moves backward, it creates suction, drawing liquid into the cylinder.
• When the piston moves forward, the suction valve closes, and the discharge valve opens, allowing the liquid to be expelled from the cylinder.
• Double-Acting Reciprocating Pump:
• Operation:
• In a double-acting pump, suction and delivery strokes occur simultaneously.
• When the plunger moves forward, water is discharged from the cylinder through the discharge valve on one side, while the adjacent suction valve remains closed.
• At the same time, the opposite side of the piston performs the suction stroke, drawing in liquid.