ETA Series Centrifugal Pump

ETA Series Centrifugal Pump

The ETA series centrifugal pump is of the centrifugal type and is produced only in various sizes from 32 mm to 300. The body and impeller of these pumps are made of cast iron and can be supplied with other materials upon customer request. ETA pumps are capable of transferring large volumes of liquid.

These pumps are mainly used in industrial, manufacturing, and process units and, depending on size, are coupled with motors at 1450 rpm and 2900 rpm. The rotating system of these pumps is of the ball-bearing type, lubricated with oil.

Applications of the ETA Series Centrifugal Pump

• Suitable for pressurizing water supply lines
• Firefighting systems
• Industrial applications
• Irrigation applications
• Agricultural applications
• Air conditioning systems

Given their favorable performance and flow rate, centrifugal pumps can be considered among the most widely used pumps in various industries.

One of the unique features of this pump model is that it always delivers a specific amount of water flow at a specific and constant pressure, increasing the volume and pressure of the required consumed water. Also, due to their wide application, these pumps are designed and manufactured in various types and used in different fields. Thanks to the favorable performance of this pump model, it can be used for transferring liquids and fluids in domestic, industrial, and agricultural fields.

Selecting the Pump Required for the Project

Below, we want to select the ETA centrifugal pump whose flow rate and head are 50 m³/h and 29 m, respectively.

1) Pump Selection:

First, by referring to the overlap curve of centrifugal pumps, we will have two options with these specifications:

A. Pump 65-315, 1450 rpm

B. Pump 50-160, 2900 rpm

According to physical laws, we find that pumps at high speeds experience more severe wear than operation at low speeds, and if the pump operates continuously, option A (65-315) must be used.

2) Determining the Impeller Diameter:

We refer to the hydraulic performance curve of the 65-315 centrifugal pump at 1450 rpm. On the curve, we find the intersection point of a flow rate of 50 m³/h and a head of 29 m, and the first curve above this point, which corresponds to the impeller with a trim of 310, i.e.:

65-315a 310, 1450 rpm

3) Pump Efficiency:

The pump efficiency in this example is about 65.2 percent.

4) Selecting the Electric Motor:

To select the electric motor, we consider the end of the power curve for the impeller trim of 310 and reach the value of 8.2 KW; therefore, for proper operation, we select an 11 kW electric motor at 1450 rpm.

Overlap Curve of ETA Centrifugal Pumps

Flow Rate Diagram