Esco specializes in the manufacturing of lineshaft pumps and the following types of impellers: Francis, Axial-Flow, Mixed-Flow and Propeller.

The Esco brand is the absolute leader in Vertical Pumps in Brazil.

The successful application of lineshaft pumps, as per AWWA A-106 / ANSI B 58.1 Standards, occurred at the beginning of last century in the United States when their advantages over Horizontal Pumps were assimilated by the market.

Millions of KVA are installed around the world in deep tubular wells (semi-artesian) to pump water for basic sanitation and irrigation purposes.

With the use of Vertical Pumps to impound other sources (river, lake, reservoirs, sea) which began to occur over time, Pump Houses, required by other types of equipment, were eliminated, thus providing huge cost and time reductions between the beginning of the process and the use of the system. The users noticed the advantages and they also realized that Vertical Pumps, turbine type, were completely safe since they do not depend on water level variations or the need for priming.

This is a determining fact in vital installations such as in their use in firefighting systems, basic sanitation and water supply, agricultural irrigation and drainage, among other applications.  

Despite the fact they are slightly more expensive than horizontal pumps, one on one, with the elimination of expensive Pump Houses the cost difference for jobs that use Vertical Pumps vs. the cost for those jobs that use Horizontal Pumps in their configurations is also eliminated. The advantages of the vertical pumps are clear, whether in the total investment for the job or in execution time.

Besides that, the high mechanical and hydraulic performances provide a low operational cost, which is a relevant factor when considering the current and constantly more expensive costs for any type of energy (electrical or oil-derived).

In Brazil, the use of the Vertical Pump began with Esco’s activities.

Today, large public and private customers know what to buy. 

You can and should economize. Think Vertical. Use Vertical. Buy Esco.

Radial Centrifugal Pumps: In radial centrifugal pumps, all kinetic energy is obtained through the development of purely centrifugal forces in the liquid mass through the rotation of an impeller with special characteristics. These types of pumps are used when you want to supply an elevated gauge-level load to the fluid and the flows are relatively low.

The liquid outlet direction is normal to the shaft and that is why these are also called pure centrifugal pumps.

Francis Centrifugal Pumps: Francis impellers are used in Esco Vertical Pumps (Turbine type). Their main characteristic is that their vanes are curved along two planes. This particularity makes the pump’s performance similar to a mixed-flow pump, which is able to obtain greater flows, as we will see below.

Axial-Flow Pumps: In axial-flow pumps, all the kinetic energy is transmitted to the liquid mass through pure drag forces. The liquid outlet direction is parallel to the shaft. These types of pumps are used when you want an elevated flow and the loads to be supplied to the fluid are small. The most common application for this type of pump is in irrigation services. It is important to point out that although known as centrifugal pumps, centrifugal force is not observed in their operation principles.

Mixed-Flow Centrifugal Pumps: In our analysis of pure centrifugal pumps and axial pumps, we saw both extremes of energy transmission to the liquid mass. The mixed centrifugal pumps supply this energy to the liquid in an intermediate manner, between the two extremes. In other words, part of the energy is supplied through centrifugal force and part is supplied through drag force. The composition of the two is what characterizes the mixed flow, with an outlet angle, in relation to the inlet, of between 90° and 180°.

Source: Mattos, E.E. , Falco, R. Bombas Industriais. Editora Técnica Ltda. RJ 1989.