Redesigned concept preview — addressing the 2026-06-06 UX review. View the original site →
Thermal engineering since 1955

Engineered-to-order heat transfer, built exactly to your spec.

Custom heat exchangers, IPAC industrial cooling products, and full in-house fabrication, machining and engineering — designed to ASME, TEMA and ISO 9001 standards and backed by 65+ years of precision manufacturing in Lockport, NY.

ASME Code Stamp ISO 9001 certified TEMA full range PED & international code stamps
65+
Years in thermal engineering
160,000
sq ft manufacturing facility
70+
Welding machines, certified inspectors
20+
CNC machining centers (3- & 5-axis)
What we build

Two product lines, one quality promise — and the shop floor behind them.

From a one-off ASME pressure vessel to a full IPAC cooling station, every unit is engineered, fabricated and inspected under one roof.

Shell & tube heat-exchanger tube bundle

Engineered to Order

Continuous fin-tube and shell & tube heat exchangers and pressure vessels, built to ASME standards and your exact specifications.

View ETO products →
Industrial chiller heat exchanger

IPAC Industrial Products

Aftercoolers, separators, moisture traps, glycol recyclers and cooling stations — world-leading compressed-air care equipment.

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In-house welding department

Services

Welding, CNC machining, fabrication, final metal prep, aftermarket and quick-ship — full-service from concept to production.

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Integrated engineering tools

Size your equipment before you ever pick up the phone.

Our IPAC and SEP calculators are built right into the site under one brand. Size a unit, then send the exact configuration to our engineers as a quote request — no re-keying, no guesswork.

Each calculator can hand its results straight to a pre-filled quote request.

Plate heat exchanger detail
Built to code

Engineering depth an evaluator can verify.

Our calculators aren't black boxes. The published basis of calculation, materials of construction and code compliance are all documented.

ASME Code Stamp (U) ISO 9001 TEMA (full range) European PED China & Korea Code Stamps
Where the numbers come from. See the technical reference for the calculation basis, standards, materials, units and limits of validity behind the IPAC and SEP sizing tools.
In-house, end to end

65 years of fabrication under one roof.

From a 250 sq ft garage in 1955 to a 160,000 sq ft facility today, DMI has kept engineering, fabrication, machining and inspection in-house — so quality is controlled at every step.

  • Carbon & stainless steel
  • Aluminum
  • Titanium
  • Pressure vessels
  • Locomotive exchangers

Our history →

DMI fabrication shop floor

Have a sizing result or a spec? Start an RFQ.

Send us your application — or a configuration straight from the calculator — and an engineer will follow up with a quote.

Request a Quote