5 Common Challenges with Centrifugal Pumps and How to Prevent Them

One of the most widespread types of pumps that are used in the food and beverage sector, dairy plants, and pharmaceutical use is the centrifugal pump. Their ease of design, smooth operation, and ability to handle large amounts of liquid are the primary reasons why they are popular in these hygienic areas of application. They are quite significant in the safe transportation of milk, juices, and sauces, among other products, in the production process.

Nevertheless, centrifugal pumps, despite their reliability, do not have absolutely no issues. However; over time, these pumps may leak, vibrate, or lose functionality due to errors during installation, uneven cleaning or some other wrong operation. Knowledge of such challenges and prevention mechanisms will save time, minimise maintenance expenses, and quality of the products.

Here are five common problems that occur with centrifugal pumps, and some easy ways to prevent them.

1. Cavitation - The Hidden Enemy

Cavitation occurs when small air bubbles develop inside the pump and then burst. It may make the pump noisy, cause vibration, and even cause damage to certain parts such as the impeller.

Why it happens:.

• The suction side does not possess sufficient pressure.
• The suction pipe is either blocked or too long.
• The pump is running at an incorrect flow rate.

How to prevent it

• The suction side does not possess sufficient pressure.
• Keep the suction line short and free from bends or clogs.
• Always operate the pump near its best efficiency point (BEP).

Fristam's FP Centrifugal Pumps are designed to minimise cavitation for smooth and reliable operation in every process.

2. Mechanical Seal Problems

It provides a seal to prevent the liquid from leaking out of the pump. Mechanical seal failure may result in leakage, noise, or pressure loss.

Why it happens:.

• Running the pump dry without liquid.
• Wrong installation of the seal.
• Liquid being pumped contains solids or is too hot.

How to prevent it

• Always fill the pump with liquid before starting.
• Use good-quality seals made for your type of fluid
• Regularly check and replace worn seals.

Hygiene is one of the most vital factors in the food and dairy industries. Fristam Pumps have front-loading mechanical seals that are easily cleanable, thus helping you avoid leakage and downtime.

3. Bearing Damage

Bearings support the pump shaft for its smooth running. When bearings wear out, the pump can start to make noise or vibrate more than normal.

Why it happens:.

• Inadequate lubrication or excessive lubrication.
• Pump and motor not properly aligned.
• Water or dirt entering the bearings.

How to prevent it

• Follow the pump's maintenance guide for lubrication.
• Carefully align the pump and motor.
• Keep the seals in good condition to prevent contamination.

Quality manufacturers of centrifugal pumps, such as Fristam, use more durable bearings that last longer and require less frequent servicing.

4. Blockages and Clogging

In most industries, such as dairy or beverages, pumps often deal with thick or sticky liquids like milk, cream, or fruit pulp; once solids or residues accumulate, they can block the pump and reduce flow.

Why it happens:.

• Particles or solids in the fluid.
• Poor filtration at the suction side.
• Poor cleaning between runs

How to prevent it

• Prevent solids from entering with the use of filters or strainers
• Clean the pump regularly using CIP (Cleaning in Place) systems.
• Choose pumps that can handle viscous or lumpy products.

The Fristam FP Centrifugal Pump features smooth, stainless steel interiors that resist clogging and make cleaning easy, perfect for hygienic industries.

5. Operating Away from the Best Efficiency Point (BEP)

Every pump has a point where it works best, and this is called the Best Efficiency Point or BEP. Running the pump too far from this point can cause vibration, noise, and wasted energy.

Why it happens:.

• Wrong pump size for the job.
• Variable flow does not match the pump.
• Controlling flow by throttling the valves too much.

How to prevent it

• Choose the appropriate type of centrifugal pump for your process.
• Use a variable frequency drive to control speed when necessary.
• Get advice from the manufacturer for correct sizing.

Operating close to the BEP reduces power consumption, prolongs pump life, and preserves the quality of your product.

How Fristam FP Centrifugal Pumps Solve These Problems

Fristam's FP Centrifugal Pumps are made with precision and care to handle all these challenges. Constructed from high-quality stainless steel, they are hygienic, durable, and easy to maintain. Their internal surfaces are smooth, which allows for gentle product handling-a very important feature for the food and beverage industry or in a dairy plant.

Fristam pumps are also:

• Designed for efficient and quiet operation.
• Easy to clean with full CIP and SIP compatibility.
• Built to last, with strong materials and smart engineering.

Whether you are transferring milk, juice, cream, or any liquid product, Fristam's hygienic pumps provide you with reliable performance and maintain your process safely and efficiently.

Final Thoughts

Centrifugal pumps are the heart of many industries. By understanding common problems like cavitation, seal leaks, or clogging, and taking simple preventive steps, you can keep your system running smoothly. Fristam's FP Centrifugal Pump takes these everyday challenges into account. Backed by over a century of engineering experience, Fristam continues to offer hygienic, long-lasting, high-performance pumps trusted across leading food and beverage industries worldwide.

If you're looking for a reliable partner in pumping solutions, think Fristam.

FAQs

1.What are the most common problems with centrifugal pumps?

Common issues include cavitation, seal leakage, bearing failure, clogging, and running away from the Best Efficiency Point (BEP), which reduces performance and efficiency.

2. Why is my centrifugal pump losing prime or not pumping fluid?

This usually happens due to air leaks in the suction line, blocked intake, low fluid levels, or running the pump dry without proper priming.

3. What are the signs that my centrifugal pump needs repair?

Unusual noise, vibration, leakage, low flow rate, or increased power consumption are clear signs your centrifugal pump may need maintenance or repair.