Por conta da sensibilidade da constituição das bombas de lóbulo rotativo, os fluidos sólidos ou abrasivos podem gerar danos à sua estrutura. Devido a essa característica, esse tipo de bomba apresenta um custo de manutenção elevado, tornando a sua operação mais cara e complexa.
Nesse sentido, as bombas pneumáticas de diafragma da Graco que são operadas eletricamente seguem oferecer um custo-benefício superior e mais vantagens para a indústria.
Quais são as principais desvantagens das bombas de lóbulo rotativo?
Rotary lobe pumps can be used in a wide range of applications within industries due to their small design and ability to operate at high temperatures. However, this type of pump has some disadvantages, as we will see below:
Reduced lift when pumping thin liquids: thin fluids that are not lubricants may not be pumped with quality by this type of equipment. This is because these pumps handle a small amount of fluid that goes from discharge back to suction, varying according to the viscosity level of this fluid.
Very high maintenance cost: rotary lobe pumps contain rotating parts that require care and precision in their operation, making this pump a very expensive and low-cost solution for the company. Another problem it presents in its structure are the expensive seals that are equally sensitive, facilitating the incidence of leaks.
High investment: the manufacturing cost of rotary lobe pumps is considerably higher compared to other more efficient solutions on the market. This is because its parts and structure are complex and sensitive, making their manufacturing cost very high.
It is not the best solution for abrasive fluids: due to the sensitivity and complexity of its parts, this type of pump is not the ideal solution for industries that need to pump abrasive fluids. This type of component can cause damage to its structure and harm its entire operation.
Cannot run dry: this type of pump also cannot run dry for long periods due to damage to its rotors and other parts. As a rule, the fluids being pumped function as a lubricating agent for the rotary lobe pump components.
Why rely on a pneumatic diaphragm pump?
As pneumatic diaphragm pumps are able to provide a more efficient, complete and excellent cost-benefit solution. In addition to being able to handle different types of fluids at a wide range of temperatures, these pumps can also guarantee other advantages, such as:
They are self-priming;
Sealless design that prevents leaks;
Low maintenance cost;
Low pulsation;
Ability to stop under pressure;
Can run dry;
Abrasive fluids;
Can pump thin, low-viscosity fluids.
