How Diaphragm Pumps Work: Simple Explanation.

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How Do Diaphragm Pumps Work? A Step-By-Step Explanation.

Diaphragm pumps are a type of positive displacement pump that use a reciprocating diaphragm to transfer fluids. In this article, we will explain how diaphragm pumps work in a step-by-step manner.

Step 1: Suction Phase.

The pumping cycle begins when the diaphragm, a flexible membrane made from materials such as rubber, thermoplastics, or Teflon, starts to move downwards. This creates a suction effect, which pulls fluid into the pump through the inlet valve.

Step 2: Displacement Phase.

As the diaphragm continues to move downwards, the fluid is trapped between the diaphragm and the outlet valve, causing the outlet valve to close. Once the diaphragm reaches the lowest point of its cycle, it starts to move upwards, reducing the volume of the pump chamber and thus increasing the pressure of the fluid inside it.

Step 3: Discharge Phase.

As the diaphragm moves upwards, the pressure inside the pump chamber increases to a level that forces the outlet valve open. This results in the fluid being transferred out of the pump and into the discharge piping or container.

Step 4: Return Phase.

Once the diaphragm has reached the highest point of its cycle, it starts to move downwards again, which causes the outlet valve to close and the inlet valve to open. This completes one full pumping cycle, and the process is repeated for as long as the pump is in operation.

Advantages of Diaphragm Pumps.

One of the main advantages of diaphragm pumps is their ability to handle viscous and abrasive fluids, as well as fluids with high solids content. They are also able to handle delicate or shear-sensitive fluids with minimal damage due to their gentle pumping action.

Another benefit of diaphragm pumps is their ability to self-prime, which means they can lift fluids from a low-level source without the need for external assistance. They are also able to run dry without causing damage to the pump.

Conclusion.

In summary, diaphragm pumps are a type of positive displacement pump that use a reciprocating diaphragm to transfer fluids. Their step-by-step operation involves suction, displacement, discharge, and return phases. Diaphragm pumps offer several advantages over other types of pumps, including the ability to handle viscous and abrasive fluids, self-prime, and run dry without damage.

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