MWS Water and Water/Glycol System

  • Heat Water and Water/Glycol Solutions to 300°F
  • 50 - 400 kW
  • 240 V, 480 V and 600 V, 3 -Phase, 60 Hz
  • Compact Footprint for Installation
  • 150# Welded Steel Construction
  • Copper Sheath Heating Elements
  • High Temperature Centrifugal Pump
  • Electronic Digital Temperature and Process Control
  • Discharge Pressure Gauge
  • UL NEMA 12 Electrical Enclosure
  • Optional External Cold Expansion Tank
  • Optional External Heat Exchanger


Chromalox MWS - Mid-Size Water/Glycol System - is engineered to operate to 300°F (150°C) with either water or water/glycol fluids. Its electric heating core assures responsive and precise temperature control in a space saving package. The system is suitable for a large range of heating needs with a compact design. The MWS operates in a closed loop system using a cold expansion tank (optional).


Chromalox MWS system is great for applications such as reactors, evaporators, dryers, platen presses, heat excangers, roll heating, or any jacketed kettles / vessels / tanks. Hot water systems can be used in a variety of industries such as chemical, plastics, cosmetics, automotive, rubber, refining, pharmaceutical, non-woven / textiles/ fibers, aerospace, or any other industrial market.


Chromalox MWS systems are ruggedly constructed for industrial applications. The heavy-duty, steel support base features channel grooves for forklift transport. The heater chamber is fully welded and houses Chromalox brand, long-lasting heating elements. The panel is fully UL-listed and assembled in-house. The pump is air-cooled with a mechanical seal, rated to 300°F (150°C). The final assembly is fully-shop tested prior to shipment.

Standared Features and Benefits

  • Electronic Process Control
  • Element Overtemperature Protection
  • Air-Cooled Mechanical Seal
  • Insulated Heating Chamber
  • Discharge Pressure Gauge
  • Compact Footprint
  • Fully Pre-wired & Tested
  • Centrifugal Pump
  • Temperature rating to 300°F (150°C)
  • 150# ANSI Flange Connection
  • Start / Stop buttons with Motor Starter
  • Pilot Lights for Power, Heater, & Pump


  • Precise process control
  • Protect elements and fluid from overheating
  • No external cooling needed
  • Maximize efficiency by minimizing heat loss
  • Confirm pump operating performance
  • Space saving design
  • Ready to operate on site
  • Minimize piping configuration
  • Covers most applications
  • Easy fit up to installed piping
  • Complete operating system
  • Visual indication of system operation


  • Electronic Solid State (SCR) Trim Power Control (standard on 300-400 kW units)
  • Strainer
  • Powder Coated or Stainless Steel Side Coverings / Support
  • Dedicated Fill Connections
  • NEMA 4 or 4X (Stainless) Construction
  • Class 1, Div 2 Hazardous Area Rating (with purge)
  • Panel Disconnect Switch
  • Heater On/Off Switch
  • Suction Pressure Guage
  • Inlet / Outlet 150# Gate Valves
  • Drain / Bleed Values
  • Digital Overtemperature Controller
  • Relief Valve
  • ASME Design & Certified, Section VIII, for 100 psi at 300°F (150°C)
  • Heat Exchanger (shipped loose for customer installation)
  • Expansion Tank (shipped loose for customer installation)
  • Liquid Level Switch for expansion Tank

To Order:

Request a Quote

Standard models are assembled to order. See catalog page PDF in Resources section above for available configurations. Custom designs are available to your industrial heat application. For more information, please contact your local Chromalox representative by clicking "Request a Quote" or calling 800-443-2640.