What is the characteristics of reciprocating pump?

What is the characteristics of reciprocating pump?

Reciprocating pumps run at a much lower speed than Centrifugal pumps. By increasing speed, the packing and sealing life of the machine can be compromised. Balancing speed and plunger size can improve reliability and increase plunger and sealing life.

What are the characteristics of pumps?

Pump characteristics—such as flow, pressure, efficiency and brake horsepower—are shown graphically on a pump curve.

What are the factors which influence the speed of a reciprocating pump?

Important factors affecting pump performance are surface roughness; internal clearances; mechanical losses, such as those related to bearings, lip seals, mechanical seals, and packing; high suction specific speed; impeller trim; and the viscosity of the fluid pumped.

What is constant flow pump?

What is constant-flow perfusion? It is a method of perfusing a liquid with a constant flow rate pump. Once the flow rate of the pump is set, the flow rate kept constant until the pump stops, making it easy to monitor the flow rate.

How is the maximum speed of a reciprocating pump determined?

Maximum speed of a reciprocating pump will be determined on the basis of fact that the pressure in the cylinder during suction and delivery stroke, should not fall below than the vapour pressure of liquid, flowing through suction and delivery pipe.

How reciprocating pumps are classified?

Explanation: Reciprocating pumps are classified according to the number of cylinders. And also it classified according to the number of piston sides. Explanation: Simple hand operating pump is also called as bicycle pumps.

When the speed of a centrifugal pump is constant?

Centrifugal Pump MCQ Question 11 Detailed Solution If the speed is kept constant, the variation of manometric head, power and efficiency with respect to discharge gives the operating characteristic curves of a pump. The abscissa represents the discharge of the pump.

What is a type of reciprocating pump?

There are three types of mechanism defined reciprocating pumps: piston, plunger and diaphragm or bellows. Valves at each end of the volume alternately close and open to isolate the higher pressure volume from the suction on the compression stroke and the higher pressure discharge from the volume on the return stroke.

What are the main components and action of a reciprocating pump why a reciprocating pump is called a positive displacement pump?

Reciprocating positive displacement pumps A Reciprocating Positive Displacement pump works by the repeated back-and-forth movement (strokes) of either a piston, plunger or diaphragm (Figure 1). These cycles are called reciprocation.

How does the constant flow mode different from the constant pressure mode?

A “constant pressure” method will experience a decrease in the forward movement of gas through the column as the combating viscosity increases, while a “constant flow” method will adjust the pressure to maintain a consistent flow-rate through the column as temperature increases during a method.

Which type of pump is reciprocating pump?

A reciprocating pump is a class of positive-displacement pumps that includes the piston pump, plunger pump, and diaphragm pump. Well maintained, reciprocating pumps can last for decades. Unmaintained, however, they can succumb to wear and tear.

What is the function of reciprocating pump?

A reciprocating pump is a mechanical device that changes the mechanical energy of the fluid into hydraulic energy (pressure energy). It uses a piston or plunger for pumping the fluid from one location to another.