Heat exchangers, often referred to as "industrial air conditioners," are indispensable critical equipment in industrial production. From precision aerospace components measured in grams to hundred‑ton‑scale petrochemical equipment, Defon's heat exchangers achieve full‑scene coverage from air to ground to sea, with a comprehensive product portfolio spanning seven major categories — fin‑tube, shell‑and‑tube, plate‑fin, plate, pressure vessel, LNG/methanol fuel supply systems, and fuel/lube oil separation and supply modules (oil stations) — encompassing over 2,000 product variants, making the company an indispensable "temperature guardian" behind major national equipment.
Currently, Defon's products are widely used in air separation and compressors, metallurgy, petrochemicals, electric power engineering, marine, construction machinery, and aerospace. Behind all of this lies Defon's unwavering commitment to heat‑exchange technology over more than seventy years.
In the Air
Precision "Aviation Temperature" Measured in Grams
In the aviation sector, every gram of weight affects flight safety and fuel efficiency. Defon's heat exchangers are precisely designed in "grams" and have been successfully applied in key scenarios such as aircraft engines and helicopter power units, becoming indispensable core components in high‑end aviation equipment. For one helicopter heat exchanger, the weight specification was 5.8 kg; Defon not only achieved 4.7 kg but also improved heat exchange efficiency by 10% over the original standard.
On the Ground
Hundred‑Ton "Industrial Air Conditioners" Safeguarding Major National Equipment
From a ground perspective, Defon's heat exchanger products are found across a wide range of major national equipment and key projects, covering everything from shell‑and‑tube to fin‑tube designs.
In the petrochemical and energy sectors, Defon's fin‑tube heat exchangers have achieved major technological breakthroughs. The company's independently developed "high‑efficiency enhanced heat transfer inner‑petal finned tube heat exchanger" has entered mass production. With its unique petal‑shaped inner tube structure, heat transfer area is increased by 40%‑50%, saving customers approximately RMB 270,000 in electricity costs per unit per year while reducing CO₂ emissions by about 220 tonnes.
In large‑scale air‑separation compression equipment, nuclear‑grade safety heat exchangers, high‑efficiency energy‑saving hydrogen coolers for supercritical thermal power unit gas turbines, and many other fields, Defon's core heat‑exchange technology continues to maintain an industry‑leading advantage.
At Sea
A Comeback from "Bottleneck" to "China Solution"
In the marine equipment field, Defon's spiral‑wound heat exchangers and marine LNG fuel storage and supply systems represent a landmark achievement in the company's expansion from a single heat‑exchanger business into green marine equipment.
From establishing an LNG laboratory to overcoming technical challenges, Defon's products now form a complete ultra‑low‑temperature LNG power solution, certified by internationally recognized classification societies including CCS, ABS, LR, BV, and RINA.
The Innovation Ecosystem Behind the Technology Matrix
Defon's seven‑category heat exchanger matrix achieves complementary and synergistic technology pathways and performance tailored to different industrial operating conditions, comprehensively addressing diverse heat‑exchange requirements across aviation, industrial, and marine scenarios.
The confidence behind this full‑scene coverage is rooted in Defon's core strengths in material R&D, process manufacturing, and system integration. The company has established a stringent quality control and specialized certification system for high‑end sectors, while providing customized solutions and full‑process services to achieve deep integration of thermal management systems with customer equipment.
From aviation equipment at 10,000 meters above sea level, to industrial production lines across the vast land
