Chilled Water Buffer Tanks

Design, create, and deliver chilled water buffer tanks with the Midwest Tank team.

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Your guide for Chilled water buffer Tanks

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asme logoChilled Water Buffer Tanks add water volume to chiller systems to create enough buffer capacity for the system, thus improving temperature control and a more stable operating system.  Midwest Tank Co. builds a variety of sizes and capacities to meet your needs.

We custom build the chiller buffer tanks to meet ASME Section VIII, Div. 1, code with an ASME U stamp and National Board Registered.  We can fabricate a variety of tank sizes, with each tank having an internal baffle and a variety of inlet and outlet options.

For quote requests, please fill out the information on our Chilled Water Buffer Tank sketch and send it to us.

See below for some of our more common tank sizes:

Chilled Water Buffer Tank A6618
chiller tanks 1027
Item # Capacity Diameter Height
CWBT-80 80 gal 24 in 58 in
CWBT-130 130 gal 24 in 82 in
CWBT-200 200 gal 30 in 84 in
CWBT-300 300 gal 36 in 86 in
CWBT-500 500 gal 42 in 100 in
CWBT-850 850 gal 54 in 107 in
CWBT-1040 1040 gal 60 in 110 in

ASME-Certified Chilled Water Buffer Tanks for Stable Cooling Systems

Midwest Tank Company manufactures custom chilled water buffer tanks designed to improve temperature control and system stability in chiller-based HVAC and process cooling applications. Built to ASME Section VIII, Division 1 standards, each tank carries the U stamp and is registered with the National Board. Our tanks are fabricated with internal baffles and multiple inlet/outlet configurations to meet your specific flow and volume requirements.

Why Buffer Tanks Matter in Chiller Systems

Chilled water buffer tanks increase the total water volume in a closed-loop system, helping to prevent short cycling and maintain consistent temperature control. By adding thermal mass, these tanks reduce compressor wear, improve energy efficiency, and allow chillers to operate within optimal parameters. They’re especially valuable in systems with variable loads or oversized equipment.

Standard Sizes and Custom Fabrication

Midwest Tank Company offers buffer tanks with custom volumes and inlet sizes to match your operation’s needs. Each tank is built to fit your available space and performance needs. For quoting, simply fill out the drawing form with your required dimensions, inlet/outlet specs, and pressure ratings. Our team will provide a detailed drawing for approval before production begins.

Built for HVAC, Industrial, and Process Cooling

Our chilled water buffer tanks support a wide range of applications, including:

  • Commercial HVAC – Stabilizing temperature in multi-zone cooling systems
  • Industrial Cooling – Supporting process chillers in manufacturing environments
  • Data Centers – Enhancing thermal storage for mission-critical cooling
  • Medical Facilities – Improving chiller efficiency in climate-controlled systems
  • Institutional Buildings – Reducing cycling in large-scale HVAC installations

MWT delivers durable, code-compliant buffer tanks that help your system run smoother and smarter.

FAQs

What Does a Chilled Water Buffer Tank Do?

It adds water volume to a chiller system, helping to stabilize temperature, reduce compressor cycling, and improve overall system efficiency.

Are Your Buffer Tanks ASME-Certified?

Yes. All tanks are built to ASME Section VIII, Division 1, carry the U stamp, and are registered with the National Board.

Can You Build Tanks to Fit my Space?

Absolutely. We offer custom fabrication based on your available footprint, inlet/outlet needs, and system specs.

Do Buffer Tanks Work with Variable Load Systems?

Yes. They’re especially effective in systems with fluctuating demand, helping maintain consistent operation and reducing wear on equipment.