CAST-X 2500 Circulation Heater

The CAST-X 2500 is our most compact dual-tube model, a powerful and versatile mid-sized heater

These CAST-X in line heaters are manufactured to safely heat flammable gases and explosive liquids.


  • Natural Gas Regeneration & Fuel Conditioning
  • Paint, Solvent & Petrochem Heating
  • For Use in Temperature Control Units (TCUs)
  • Beverage Processing & Pasteurization
  • Industrial Gas Heating & Air Separation
  • Urethane / Foam System Heating


  • Fluid Path has No Contact with Heating Elements
  • Heated Media is Isolated in Seamless 316 Stainless Steel Tubes
  • Allows for Safe Heating of Explosive Gases & Flammable Liquids
  • Excellent Performance in High-Pressure Applications
  • Suitable for Use with Sterile and Zero Contaminant Processes
  • Compatible with Standard Controls (PID, PLC, Multi-Loop, etc.)
  • Small Size Enables Easy Integration into Larger Machines
  • Self-Draining Flow-Tubes, and Long-Life Heating Elements



  • 2.5 kW Total to 15 kW Total
  • Voltage Range: 208 - 575V
  • Max Line Current: 30 A per circuit


  • .625” OD (5/8") (15.9 mm)
  • .065” Wall (1.7 mm)
  • Overall Process Tube Length: 130” (3302 mm) each
  • 316L Stainless Steel (standard)
  • Inconel (optional upgrade)
  • Passivated or Electro-Polished (optional upgrades)
    Max Pressure: 4000 psi (275 bar)


  • NEMA 1 (general-purpose/dust-proof)
  • NEMA 4 (moisture-resistant)
  • NEMA 7 (explosion-proof)
  • ATEX (explosion-proof)

Max Working Temperatures:

  • NEMA 1 (dust-proof/general-purpose): 662°F (350°C)
  • NEMA 4 (moisture-resistant): 572°F (300°C)
  • NEMA 7 (explosion-proof): 482°F (250°C)
  • ATEX (explosion-proof): 482°F (250°C)
  • Published temperatures are for housing at 12 o’clock position;
    Higher temps may be possible at 6 o’clock position. See factory for details.


  • K or J Type Thermocouples Standard
  • Snap-Action High-Limit Thermostat
  • Process and High-Limit Thermocouples

Available Accessories:

  • Insulating Jackets
  • Compression Fittings

Download the
CAST-X 2500
Technical Brochure

Temperature and Pressure Charts

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Dimensional Drawings

Wiring Diagrams

Detailed Images

CAST-X 2500 Circulation Heater Part Numbering System

This is the part numbering configuration key for CAST-X 2500 in line heaters, used for ordering product online.

Building a CAST-X 2500 Part Number:
Use the tables below to build each section of your CAST-X 2500.  After assigning letters/numbers for each applicable section, you will have a complete part number, ready to quote.
For assistance, contact CAS directly.

POWER Table For CAST X 2500 In Line Heaters
Many CAST-X 2500 in line heaters are available with water-proof and explosion proof enclosures.
High limit switches for CAST-X 2500 in line heaters are shows in this image.
Thermocouple options for CAST-X 2500 in line heaters are seen in this image.
CAST-X 2500 in line heaters are available with stainless steel tubes, Inconel tubes and electropolished or passivated tube options for medical and sterile applications.
Machining options for CAST-X 2500 in line heaters can be found here.
Custom flowtubes can be ordered here for CAST-X 2500 in line heaters from Cast Aluminum Solutions.
Accessories for CAST-X 2500 in line heaters can be ordered using this table.