What is Best to Protect Pumps from Liquid Damage

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Pumps play an important role in moving liquids such as water, chemical slurries and coolant fluid. Most dynamic pumps in the industry are centrifugal pumps.

You may not understand all the implications of pump systems and how to troubleshoot them, select the proper pump and how to protect it from liquid damage.

Pumps can be damaged by conditions that cause the pump to run continuously, but more so if the pump does not have water passing through all its mechanical parts. But what about protecting it from liquid damage? Improper operation of pumps can result in damage to the pump and ultimately loss of function of the system where the pump is installed.

To protect your pumps from liquid damage, replace old parts as this can lead to the pump overheating, test for air leaks or suction blockages, perform routine shut-off tests and remember to never run liquid through a pump that is not designed for it. 

Air Bubbles- Pump Performance Decreases

Sometimes within a pump, air bubbles are generated because of a pressure drop with the liquid. This results in a cavity, and changes in pressure within the pump turn the liquid into vapor. The vapor is turned back to liquid as the pump’s impellers spin. Pressure increases and the air bubbles implode. With the collapse of vapor bubbles, the impellor surface is eroded and pump performance decreases. Total pump failure can result. 

Centrifugal pumps rely on changing the pressure inside the unit to create a vacuum. The liquid is then pushed into the unit as opposed to it being pulled in. Acrylic pumps are more pliable and more resilient than metal surfaces. With suction cavitation, low-pressures prevent the pump from receiving incoming liquid and this results in low-flow.

Preventing Cavitation
At the eye of the impeller, bubbles form, moving toward the discharge side of the pump, compressing the liquid and imploding against the impeller’s edge. This suction cavitation can be caused by a number of factors – the fluid that is heated to the point of vaporization or an obstructed strainer.

Discharge cavitation occurs when a pump’s discharge pressure is high, and this prevents fluid from easily flowing out. This leads to recirculation of the fluid in the pump, a vacuum effect is created and the pump shaft breaks. The best way to prevent pump cavitation is to operate a pump best suited for the application. Keeping an eye on fluid temperature will also prevent cavitation. 

When you click here, you discover how the best engineering design company is able to offer solutions to the cause of failures in fluid systems. Suction filtration is accelerated with the help of a vacuum but in some cases, 2-stage pumps, with their high pumping speed, can accelerate the suction filtration process. To prevent fluid system failures, their filtration is being used effectively in hundreds of applications worldwide.


Donald Phillips