What Are the Most Common Pneumatic Diaphragm Pump Mistakes (and Solutions!)

A bomba pneumática de diafragma é um dos equipamentos mais eficientes para quem busca um bombeamento seguro. Por conta da sua alta versatilidade, elas podem ser aplicadas em diversas operações, e apresentam uma funcionalidade simples e intuitiva. E o mais importante: um desempenho superior entre as bombas de deslocamento positivo disponíveis no mercado.

Para que ela entregue todos os seus benefícios pelo maior tempo possível, é muito importante que os proprietários saibam resolver os principais problemas que elas podem vir a apresentar. Reunimos aqui os cinco principais e suas respectivas soluções, confira!

1. Compatibilidade química

When purchasing a pneumatic diaphragm pump, one of the most important aspects to be evaluated is the chemical compatibility of the pump with the material to be transferred. Bearing in mind that this compatibility does not refer only to the pump's material, but also to elastomers and castings.

Knowing whether the materials are compatible is essential to ensure greater safety in your operation:

Metal pumps: robust and resistant, metal pumps are ideal for displacing abrasive pastes and fluids. They are also very suitable for operations in an open environment, due to their high resistance to the sun.

Plastic pumps: these pumps are also robust and lighter than metal pumps, and can be applied to transport different materials.

2. Fluid temperature

To the choose pneumatic diaphragm pump for its operation, it is very important to consider the temperature of the fluid that will be transported. These pumps can handle a wide range of temperatures, but are generally limited to 104°C. Therefore, it is important to choose a material that withstands the operation without damaging the structure of the pump.

In the case of operations at lower temperatures, the flexibility of the diaphragm may be compromised, and at higher temperatures, the pump may show cracks, wear, swelling, corrosion, among others.

For this reason, check in advance what the temperature of the transported fluids will be and which material is ideal for your needs. The ideal pump is:

High temperatures: stainless steel or aluminum pumps (FKM, EPDM, PTFE or PVDF);
Low temperatures: stainless steel or aluminum pumps (EPDM, FKM or Santoprene).

3. Correct sizing

This is another extremely relevant factor for those looking for a pneumatic diaphragm pump in their maximum performance. It is necessary to consider the pressure and flow rate of the pump for best performance.

Through the flow rate of the pump, it is possible to determine if it is working according to the expected performance and to know which is the ideal pump for your application. With flows of up to gpm, pneumatic diaphragm pumps can have their performance adjusted through discharge height or air pressure. For larger flows, it will be necessary to choose a pump with a larger constitution.

Port sizes should also be considered to ensure the most efficiency and longevity for your pump.

4. Incorrect pump torque

Depending on the type of fluid transported, a leak can pose a major risk to your operation. It is natural that with the passage of time and with the use of the pump, some components may show wear or some relaxation.

For this reason, whenever it is necessary to replace the components, or when using a new pump, check all tightening and adjustments in order to prevent leaks.

5. Lack of training

Although pneumatic diaphragm pumps are easy to use, it is very important for operators to understand how it works to ensure the excellent performance it can provide. Therefore, even before installation, it is important to read the manuals to ensure that it is installed safely and quickly. In addition, it is important to maintain contact with the manufacturer to ensure assistance whenever necessary.

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