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FROM MINIMAL TO FULLY BUILT-TO-SPECIFICATION CUSTOM DESIGNS 

Custom Engineered Industrial Direct Inject Heating 

DIW Series Custom-Engineered Industrial Direct Water/Water-Glycol Heating Systems offer Safe Reliable Performance in an industrial-grade system that takes advantage of your facility’s central heat source to precisely control temperatures in a specific secondary sub-loop of your process using the direct injection of water/water-glycol. 

For use with available existing water/water-glycol central heating sources, DIW Series Temperature Control Units offer a better alternative for applications that require flow rates higher than available from the central system or that require precise temperature control and/or heating and cooling. DIW Series Systems are for use with available existing water/water-glycol central heating sources, with maximum operating temperatures up to 400°F, up to 600 Volt, 3-Phase, 50/60 Hz power capabilities, and heating capacities of up to 5 MM Btu/Hr.  If an existing water/water-glycol central heating source is not available, combine with one of HEAT’s WG Series or GFW Series water/water-glycol systems to provide the necessary heating capacity needed.  

Our engineering team will work with you to design a system based on your unique process or application. DIW Series systems typically include a Circulating Pump, Heating Circuit, Cooling Circuit, Expansion Tank, and Control Panel. These units are constructed with all-welded Carbon Steel or Stainless-Steel wetted materials, insulated with Non-Wicking Cellular Glass, Fiberglass, Rubber and Mineral Wool Insulation, and assembled on a drip-proof, seal-welded plate-and-channel fluid containment base. 

HEAT offers four distinct levels of customization, ranging from minimal customization to fully built-to-specification designs. Each unique system undergoes a Factory Acceptance Test in accordance with HEAT standard practice prior to shipment. 

Why Custom Design?
  • Maximum Operating Temperatures up to 400°F
  • Direct Inject Water/Water-Glycol Heating
  • Heating Capacities Up to 10MM Btu/hr. and Higher
  • Up to 600 VAC, 3-Phase, 50/60Hz Power Capabilities
  • General Purpose and Hazardous Area Designs
  • Design Temperatures of 200°F, 240°F, 300°F, and 400°F 
  • 4 Levels of Customization
  • Indoor/Outdoor installation
  • Heat Only & Heat/Cool Designs Available
  • Uses water/water-glycol from a central fluid system as a heat source
  • Seller standard or Custom Paint Colors 
  • Centrifugal style
  • Mechanical seal design
  • Single and dual pump configurations 
  • Direct inject water/water-glycol from an external central fluid system
  • Heat Input controlled by a Proportional Control Valve 
  • Integral and modular designs
  • TEMA / ASME exchanger designs available
  • Air-to-Water, Water-to-Water, and Direct Inject cooling options available
  • Proportional and on/off control  
  • NPT, Welded and flanged construction
  • Carbon steel and stainless steel available
  • ASME B31 Piping Materials 
  • Skid mounted and remote mounted control panels
  • Digital PID Temperature Control or Remote Operation Control
  • Configurations for external control from PLC, DCS or other external control 
  • NEMA 4, NEMA 4X, NEMA 12, NEMA 7, Class I, Division I and Class I, Division 2 
  • ASME U/UM, ASME B31.3, CRN, TEMA
  • NFP70, NFPA 79, NEC, UL, cUL, CSA 
  • MINIMAL - CATEGORY 1: REFERENCE ONLY
    • Drawings are supplied for reference as our engineering team completes the design and your system is fabricated
  • MODERATE - CATEGORY 2: DRAWING APPROVAL
    • Drawings are sent for your approval before fabrication begins
  • HIGH - CATEGORY 3: FULL APPROVAL
    • High level of input into drawings and components, with approval at every phase
  • COMPLETE - CATEGORY 4: BUILT-TO-SPECIFICATION AND FULL APPROVAL
    • Complete input to meet your plant specifications, required submittal documentation, and/or preferred brand of components. Approval at every phase. 
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Heat Brand Promise Black Background, Safe, Reliable, Performance

Heat Systems: Safe by Design

Learn more about our Standard Design Practices for Custom-Engineered Hot Water/Water-Glycol Systems 
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