Come and understand how a motor pump with a helical centrifugal rotor can be the solution for pumping low-density fluids.
For those who follow FAMAC on social media or our posts here, it should come as no surprise that centrifugal motor pumps are the most cost-effective solution for pumping liquids. After all, the current motor pump market alone is enough to confirm this statement. However, have you ever heard of a motor pump with a helical centrifugal rotor? Do you know when using this equipment becomes interesting?
In fact, there are a variety of models and sizes designed for pumping and transferring fluids in different conditions. This is where some, let's say, more delicate cases come in:
- What if the liquid is not “so liquid”, containing solids in suspension?
- What if the amount of long fibers is too large?
- What if we don't want pumping to cause any changes in the pumped liquid?
This is certainly where the strategies of teams of engineers and designers from motor pump manufacturers begin, in order to develop special designs to meet specific demands in some market niches.
Pumping different types of fluids
First of all, it is common to consider that the fluid accepted to be pumped by centrifugal motor pumps must have a maximum of 10% of its volume with suspended solids or even with a certain maximum acceptable viscosity. From this limit onwards, positive displacement pumps are required, such as helical or lobe pumps, for example.
It is certainly worth noting that the helical spindle is characterized by an “infinite thread” for high-density fluids. Thus, the helical centrifugal rotor, as its name suggests, has the shape of a thread, for pumping low-density fluids.
Therefore, when the contamination in the fluid reaches certain characteristics, it is common to give up closed rotor motor pumps and move to semi-open rotor or vortex motor pumps, always respecting the maximum diameter accepted by the pump's dimensions.
Likewise, for submersible sewage pumps, the diameter of acceptable solids is an important criterion for specifying the equipment.
We also have the option of specifying submersible pumps with grinders, which “prepare” the liquid that will be pumped, avoiding blockages (to learn more about these submersible grinder pumps, click here).
Last but not least, we have the motor pumps with a helical centrifugal rotor, which we will explain in more detail below.
Motor Pump with Helical Centrifugal Rotor
This equipment has a pumping characteristic equivalent to a centrifugal pump, but due to its helical shape, it can move the fluid in a less aggressive way, and with less interaction with any solids that may be suspended in the pumped fluid.
In fact, this feature guarantees the equipment the ability to pump long fibers without them being broken.
Thus, it can be said that the helical rotor is suitable for moving liquids in critical applications. In addition to sewage, we can point out as critical applications: pumping viscera, cellulose pulp, tannery waste, biodigesters and even live fish without them suffering major injuries when passing through the pumper.
Likewise, the helical centrifugal rotor pump allows pumping solids with a very large diameter. Basketballs have been pumped without damaging them and still maintaining an enviable hydraulic performance.
FAMAC and Hidrostal Partnership
FAMAC has in its portfolio models of motor pumps from Hydrostal, a manufacturer that offers motor pumps with helical centrifugal rotor. A high-quality product with advanced technology to meet the most diverse demands and challenges of FAMAC customers here in Brazil.
Founded in 1957, with headquarters in Switzerland and branches in several countries, it manufactures submersible and surface pumps and motor pumps for very high flow rates and pressures.
In this sense, we give special emphasis to centrifugal motor pumps with helical rotors that allow the passage of solids up to 230 mm.
As they have been widely applied, they are suitable for working with a maximum immersion depth of up to 20 meters and with liquids at temperatures of up to 40°C.
Furthermore, the products in the line:
- They deliver pressures of up to 66 mca.
- They reach a maximum flow of 1258 m3/ h.
- They are available in power ratings from 4,0 to 150 hp.
They have a motor with bimetallic thermal protector and insulation class F. They also have a humidity sensor and double mechanical seal, among other differentials that you can see in the product list at FAMAC website.
Did you see this fantastic line? Use the motor pumps with helical centrifugal rotor in different segments and applications, including:
- In sanitation systems;
- In water, sewage and pumping stations;
- In hotels and hospitals;
- In agriculture, in cold storage facilities and fish farming;
- For pumping slurry; and
- In the industry.
Are you interested? Then request a quote by contacting us through our website, through one of our resellers or by phone (47) 3374-6000. We are available to assist you.
A hug and see you soon!
