What is meant by double suction pump?

What is meant by double suction pump?

Double-suction pumps are employed when the flow rate required of a centrifugal pump becomes too large for the inlet cross-sections of one impeller or when the flow velocity in the inlet cross-section of the first impeller has to be reduced to prevent cavitation. …

What is the primary difference between single suction pump and double suction pump?

The primary difference between single suction pump and double suction pump is: impeller of single suction pump has only one water inflow end, while double suction pump has two ends; fluid flows into the single suction pump in only one end, but flows into the double suction pump in two ends, benefit of which is to …

What is the benefit of using a double suction impeller?

This double suction design eliminates the axial forces on the impeller which allows for higher flows than single suction. As a result, double suction pumps are also less vulnerable to the wear and tear caused by axial thrust, which occurs when water enters the impeller.

What is double entry impeller?

A double-entry impeller is an impeller with a suction entry on both sides. A double-entry impeller is employed to reduce the axial thrust and the NPSHr value.

What is a single suction pump?

In a single suction centrifugal pump, water flows into the pump inlet and 100% of the liquid immediately flows into the eye or inlet of the impeller. The centrifugal action then creates pressure as the water exits the impeller through the veins.

What is a single stage centrifugal pump?

A single-stage centrifugal pump consists of one impeller rotating on a shaft within a pump casing which is designed to produce fluid flow when driven by a motor. It is one of the simplest designs of pumps available and many variations in design exist to satisfy the duty requirements of applications.

What is a single stage double suction pump?

Application. – Clear water or other liquids similar to water in physical and chemical properties. – Supply and drainage systems and cooling systems in the iron and steel industry, petrochemical industry, thermo power plants, mines, etc.

Which impeller is more efficient?

1. Zinc was observed to be the most efficient impeller material with greater pump head and flow rate than the cast iron impeller and the bronze impeller. 2. Depending on pumping system requirement, zinc impeller is only recommended for low- speed pump speed requirements (say with the pump speed of less than 2850rpm).

Which type of pump impeller has the most efficient energy transfer?

Zinc was observed to be the most efficient impeller material with greater pump head and flow rate than the cast iron impeller and the bronze impeller. 2. Depending on pumping system requirement, zinc impeller is only recommended for low- speed pump speed requirements (say with the pump speed of less than 2850rpm).

What is meant by a single entry and a double entry impeller?

Single entry also called single suction pump is one in which water is admitted on one side of the impeller. Double entry or you can say double suction pump is one in which water is admitted on both sides of the impeller; axial thrust is neutralized. They are usually employed for pumping large quantities of fluid.

What is double stage centrifugal pump?

Two-stage centrifugal pumps are used in applications where higher head is required. They ensure more reliable, high efficiency process and lower operating costs instead of serial pumping system.

What is the maximum suction head for centrifugal pump?

The maximum actual suction lift for a centrifugal pump is approximately 15 ft when pumping water from an open air tank.

What kind of pump is a double suction pump?

Double suction pump is an important type of centrifugal oil pump. This type of pump impeller actually consists of two back-to-back impellers, from which the water flow into a volute.

What are the different types of centrifugal pumps?

Three types of centrifugal pumps (end suction single stage, double suction single stage, and multi-stage) are classified according to flow rate and specific speed. By

What kind of pump has two back impellers?

Two stage centrifugal pump is an important type of centrifugal pump. This type of pump impeller actually consists of two back-to-back impellers, from which the water flow into a volute.

What happens to kinetic energy in a suction pump?

After the fluid leaves the impeller and flows into the pump shell, it is slow down in the expanding tube within the shell, causing part of the kinetic energy converted to static pressure, and finally it is discharged from the pipeline along the tangential direction.