The efficiency and maintenance needs of any industrial boiler system depend on the temperature and oxygen content of the feedwater. Most commercial water treatment systems use either feedwater tanks or deaerator devices to keep boilers working at maximum efficiency. Here is an overview of these two devices and how to choose the right one for your system.

What Is a Feedwater Tank?

Feedwater tanks are open to the atmosphere, so the maximum temperature of water inside is between 155 and 185 degrees Fahrenheit. Higher temperatures will cause the water inside to boil out through a vent line at the top.

Because the contents of feedwater tanks aren’t pressurized, oxygen levels average five to 10 parts per million. Excessive oxygen levels lead to scaling and corrosion, so feedwater must be treated with chemicals inside the boiler.

While these systems typically have lower up-front expenses, systems outfitted with feedwater tanks require more preventive maintenance and monitoring. Scaling and rust must be removed on a regular basis, and valves may need to be replaced more often. Due to the recurring costs, feedwater tanks are often more expensive in the long run.

What Are Deaerators?

Unlike feedwater tanks, deaerators are closed systems that keep water under pressure. Because water inside the holding tank can be brought to a boil, deaerators can keep the supply at a steady 255 degrees. This eliminates most gas from the water, so oxygen levels are typically only five parts per billion.

With such low oxygen levels, water systems equipped with deaerators typically don’t require chemical treatment inside the boiler. They also dramatically reduce the risk of scaling and corrosion damage, making these systems much less expensive and labor-intensive to maintain. Many industrial operations find deaerators to be a more cost-effective investment in the long term, even if their initial installation expenses are higher.

Since 1982, Western Environmental Management has provided expert service and custom-designed water treatment systems to industrial operations throughout New Mexico and El Paso, TX. Whether you’re building a new facility or replacing an aging boiler system, they’ll design cost-effective solutions using the best available equipment for your operation. Visit their website for more on their boiler and water treatment services, or call (575) 885-5709 to schedule a consultation.