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OPTIMAX™ Heat Exchanger 

Watlow has over 40 years of experience designing and manufacturing heat exchangers, and we have the knowledge, experience and expertise required to create optimal heating solutions. Watlow has taken the tried and true, critical design criteria and improved it to create a new generation heating technology – the OPTIMAX™ Heat Exchanger.

Watlow’s new OPTIMAX™ technology combines optimal fluid dynamics, efficient heat transfer, low pressure drop and a compact and reliable package to create a world-class system solution.

Watlow’s EFD (enhanced fluid dynamic) technology provides advanced flow throughout the system without compromising the integrity of the fluid, heating elements and/or vessel. Fluid temperatures are further optimized through the use of OFT (optimized film temperature) technology in the heating elements. These, coupled together, provide an accelerated heat transfer rate, allowing the vessel to perform consistently at shorter lengths, or smaller shell diameters. In addition, the OPTIMAX can be designed for backwards compatibility with existing designs.

Watlow’s has validated these technologies through CFD/FEA modeling, as well as over 5000 hours of laboratory testing.


Material Maximum Operating Temperatures Maximum Watt Densities
°F °C W/in2 W/cm2
Austenitic Stainless – 304/304L, 316/316L, 321  1200 650 0 0
Duplex Stainless – 2205, 2507  1400 760 0 0
Nickel-Iron-Chromium - 800, 825, 840  1800 982 0 0
Nickel-Chromium-Iron – 600   1700 926 0 0
Nickel-Chromium-Iron-Cobalt - 625  1800 982 0 0
Nickel-Molybdenum-Chromium - C-276  1400 760 0 0


  • Catalytic cracking and regeneration
  • Gas Dehydration
  • Gas Sweetening
  • Fuel Gas Conditioning
  • Hydrocarbon Refining - Continuous Catalyst Regeneration (CCR)
  • Propylene Production - Propane Dehydrogenation (PDH)
  • Ethylene Production - Naphtha Cracking and Similar
  • Olefins Production - Methanol to olefins (MTO)
  • Air Separation Units (ASU)
  • Gas Synthesis Processes (Syngas)
  • Gas Processing
  • Compressor Trains
  • Seal gas
  • Sulfur Recovery Unit (SRU)
  • Joule-Thomson effect
  • Boil off gas (BOG)
  • Gas defrost
  • Power Generation

Features & Benefits:

Features Benefits
ANSI compatible or similar, 3 through 48 sizes
  • Provides appropriate heater size-to-application best fit for economical solution
Power Duty
  • Up to 3 megawatts
Power Duty Lifting accommodations for cranes or similar
  • Safe handling and protection from damage
Global hazardous certifications, IEC, ATEX, NRTL and similar
  • Safety and global code compliance
Voltage load connections up to 690VAC
  • Assures easy grid connection globally
Mechanical weld certification, ASME, PED and similar
  • Safety and global code compliance
Fully compatible with existing and/or new control systems
  • Allows backwards compatibility for existing installations or latest control technology on new installations
EFD – enhanced fluid dynamics
  • The most economical solution that meets all temperature, reliability and durability specifications while assuring world class pressure drop performance
OFT – optimized film temperature
  • Assures maximum protection against thermal degradation of process fluid

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Related Literature

Specification Sheets (1)



OPTIMAX<sup>®</sup> Heat Exchanger
OPTIMAX® Heat Exchanger