Alfa Laval Equipment Mistakes: 7 Questions to Ask Before You Order

Let's be honest: most equipment failures aren't the manufacturer's fault. They're the buyer's fault. I know because I've been that buyer. I'm a process engineer handling equipment replacement orders for 11 years. I've personally made (and documented) five significant mistakes, totaling roughly $180,000 in wasted budget. Now I maintain our team's pre-order checklist so nobody has to learn the hard way. If you're searching for Alfa Laval equipment, these are the questions I'd ask before spending a dollar.

Questions I answer below:

• Are Alfa Laval pumps with industrial fermentation worth the premium?
• When do Alfa Laval air cooled exchangers make sense?
• Water heater vs boiler: what's the actual difference?
• When should you choose an arctic air cooler?
• Why does cooling fan placement matter?
• Is it better to oversize a pump to be safe?
• How do you avoid repeating my mistakes?

Are Alfa Laval pumps with industrial fermentation worth it?

Yes—if you size them right. In 2019, I rejected a lower-cost pump because a colleague warned me about shear. Then I ignored that warning and bought a stock centrifugal pump for a yeast broth. The impeller shear wrecked cell viability. We lost a $14,000 batch and spent another $9,000 on an Alfa Laval pump with a low-shear design. That stung.

But the lesson wasn't 'buy Alfa Laval no matter what.' The lesson was to define the duty first. Alfa Laval pumps with industrial fermentation applications work well when the model matches the fluid, the flow, and the shear limit. If you need a clean-water transfer, honestly, you might be overpaying. Don't use a brand as a substitute for engineering.

When do Alfa Laval air cooled exchangers make sense?

Most people instantly think 'cooling tower' when they need to reject heat. Alfa Laval air cooled exchangers let the cooling fan push air across finned tubes, so you don't need makeup water, water treatment, or a chemical program. We put one on a small process skid in 2022 and it cut our water bill by about $1,100 per month.

There's a catch, though: the cooling fan motors use power. If you run them at full speed 24/7, you'll eat up those savings. Use variable-speed drives and set the fan curve for your actual summer and winter conditions. I learned that after one installation, but only after the first month's electric bill. It's not rocket science, but it's easy to overlook when you are focused on water savings.

Water heater vs boiler: what's the actual difference?

I almost grouped them together when I ordered equipment for a CIP skid, and that would have been expensive. A water heater gives you hot water near atmospheric pressure. A boiler gives you steam or high-temperature water under pressure. They serve different jobs, and the heat exchanger on the other side doesn't care what you call it—it cares about the pressure and the medium.

In Q1 2023, I went back and forth for five days on this. The data said boiler because our pasteurizer needed steam. My gut said water heater because the client kept saying 'hot water.' We caught it before ordering, but only because I remembered a mistake from 2018. I sent a water heater spec to a boiler vendor and the re-piping cost $19,000. If you're comparing water heater vs boiler, start with the process duty, not the word the plant manager uses.

When should you choose an arctic air cooler?

Honestly, 'arctic air cooler' confused me for years. It sounds like marketing, not engineering. An arctic air cooler is basically a unit cooler for cold storage rooms—it uses fans to pull room air over evaporator coils. The 'arctic' name means it is designed for low-temperature operation, not for process heat rejection.

In 2021, I chose a standard air cooler for a frozen storage room because it was $2,800 cheaper than the Arctic model. The standard fans failed twice in 18 months in the -25°C environment. Replacement fans, labor, and lost food storage time cost more than the price difference. The budget choice wasn't a bargain. If you need low-temp duty, get the unit rated for it. Don't quote me on every model number, but that's the category difference.

Why does cooling fan placement matter?

Because nobody puts it on the checklist. On an air cooled exchanger, the fan can be forced draft (pushing air through the bundle) or induced draft (pulling air through it). In 2020, I installed an induced-draft unit because it fit the skid better. In winter, the air recirculated around the fan deck and frosted the coils. We paid $6,500 for baffles and lost three days of production.

Would forced draft have solved it? Maybe. The point is that your site conditions—prevailing wind, ambient temperature, clearance above the unit—should drive the choice. Alfa Laval air cooled exchangers can be built either way, I believe, but you need to ask the question instead of copying the old skid's arrangement. I learned that the expensive way.

Is it better to oversize a pump to be safe?

No. Nope, nope, nope. I did it in 2017, my first year. I added 20% extra pump flow 'for safety' and then throttled it for two years. The pump ran away from its best efficiency point, the impeller wore unevenly, and the energy use was way higher than it should have been. According to the U.S. Department of Energy (energy.gov, accessed January 2025), pumping systems account for about 20% of the world's electrical energy demand. Oversizing is a big slice of that waste.

When I finally replaced it with a correctly sized Alfa Laval pump, our energy consumption dropped about 18% in the first month. I want to say the payback was nine months, but don't quote me on that. A bigger pump isn't better. The right pump is better.

How do you avoid repeating my mistakes?

Use a checklist. It's not exciting, but it works. After the third expensive mistake in Q1 2024, I made a one-page pre-order checklist. It asks:

• What is the exact process fluid and temperature?
• What pressure range will the equipment see?
• Is this a process heat rejection duty or a cold storage duty?
• Cooling fan: forced draft or induced draft?
• Pump duty: continuous or intermittent?
• Do we actually need steam, or is hot water enough?
• Who will maintain the fans, and what site conditions affect them?

We've caught 47 potential errors using this checklist in the past 18 months, if I'm counting right. The list is not a substitute for a proper engineering review. But it's saved us more than the $180,000 I wasted. That's why I keep sharing it.