Water Systems

Duratherm MAX

Mokon's Duratherm MAX circulating water temperature control system maximizes performance with temperatures up to 380°F (193°C) and system pressures up to 300 PSI (20.7 BAR). The Duratherm MAX is ideal for restrictive processes and high temperature water applications.

This Duratherm design features a stainless steel heater vessel that is designed and tested to ASME standards. The system utilizes nonferrous and stainless steel materials of construction and a seal-less magnetic drive turbine pump fitted with a stainless steel impeller (D4 Series) or an end suction centrifugal pump (D3 Series). The Duratherm MAX utilizes an inline heat exchanger that provides safe and dependable cooling of the process fluid and eliminates thermal shock, flashing to steam, mineral buildup and expansion noise.

  1. Single zone configurations
  2. Stainless steel sealless magnetic drive turbine pump (D4 Series)
  3. Ductile iron centrifugal pump (D3 Series)
  4. Horizontal stainless steel heater vessel designed and tested to ASME Code
  5. Stainless steel piping and welded connections
  6. Welded joints to ASME BPVC Section IX
  7. 1/8 DIN non-proprietary microprocessor-based controller in easily accessible panel
  8. Fluid high temperature safety shut-off switch
  9. Pressure relief valve
  10. Air-cooled heat exchanger for rapid cooling (D4 Series)
  11. Fluid-to-fluid steel heat exchanger (D3 Series)
  12. Solenoid cooling valve
  13. Automatic air purge
  14. Solid state and redundant contractors (D4 Series)
  1. Suction and discharge pressure gauges
  2. Heavy-duty removable casters for portability
  3. Main power door disconnect
  4. Powder-coated finish
  5. cULus 508A labeled electrical subpanel
Additional Features:
  • Small hold-up volume and energy-efficient heater design
  • Compact, sleek vertical design
  • Extended warranty:
    • 1 year on system
    • 3 years on microprocessor controller
  • Alarms – audible and visual
  • Closed loop circuitry
  • Common supply and drain connections
  • Control options – remote setpoint and re-transmission, communication ports
  • Cool down/automatic shut off via time delay relay
  • Cooling or chiller circuits
  • D3 Series available up to 340°F (171°C)
  • Emergency “crash” cooling control
  • Heat exchangers
  • Heat remover design
  • High/low heater operation (manual or automatic)
  • Manifolds
  • Modulating valves
  • NEMA/Type 4, 4X, and 12
  • NFPA 79 electrical safety standards
  • Other heater capacities and ASME Code Stamped vessel
  • Other voltages, phases, frequencies
  • Overhead piping kits
  • Pressure regulator
  • Redundant heater contactor (D3 Series)
  • Remote start/stop and control panels
  • Solid state contactors/relays and SCR (D3 Series)
  • Stainless steel cabinets and components
  • TEFC motor
  • UL and CSA certifications
  • Valve process bypass

Please consult factory for more information.

Features of Standard and Optional Controls

A variety of controls are available from Mokon to enhance the high performance of our systems. From solid state to microprocessor based, with communication capabilities to PLC type controls, Mokon can provide the type of control package right for your process.


Eurotherm 3200 Series

The Eurotherm 1/8 DIN microprocessor controller is operator friendly and easy-to-use. Standard features include a microprocessor PID controller for the highest accuracy in temperature control, a dual LCD display that shows set point and actual fluid temperature, and scrolling text messages that deliver plain language messages to let users know exactly what is happening to the process. There are optional controllers available with high/low deviation alarm, remote setpoint and retransmission, and serial communciation. A three-year warranty comes standard with the controller.



Eurotherm 3200 Series Manual

Custom Controls

Mokon's ability to meet customers' specific requirements is seen not only in custom system designs, but also in controls. Our engineers can custom design a control package that meets your specific processing needs, from brand name controls, to direct computer/host machine interfacing. All of which can be expected with the same quality and durability that our customers expect from our complete line of temperature control systems.


D3 Series — Up to 330°F (166°C)*

Model Pump (Nominal) Flow Rate & Pressure Heating Capacity & Total Amps*
(9 kW)
Heating Capacity & Total Amps*
(18 kW)
Heating Capacity & Total Amps*
(24 kW)
Heating Capacity & Total Amps*
(36 kW)
Heating Capacity & Total Amps*
(48 kW)
Process Connection Supply/Drain Connection Approximate Dimensions (L x W x H) Shipping Weight (Approx lbs.)
D3B 1½ Hp 25 GPM @ 39 PSI 15 26 34 49 64 1" FNPT 1" FNPT 37" x 25" x 39" 375
D3C 2 Hp 40 GPM @ 43 PSI 16 27 35 50 65 1-½" FNPT 1" FNPT 37" x 25" x 39" 400
D3F 3 Hp 60 GPM @ 48 PSI 17 29 36 51 66 1-½" FNPT 1" FNPT 37" x 25" x 39" 425

*340°F (171°C) available - please contact Mokon for more information



D4 Series — Up to 380°F (193°C)

Model Pump (Nominal) Flow Rate & Pressure (GPM @ 43 PSI) Flow Rate & Pressure (GPM @ 21 PSI) Heating Capacity & Total Amps* (12 kW) Heating Capacity & Total Amps* (24 kW) Process Connection Supply/Drain Connection Approximate Dimensions
(L x W x H)
Shipping Weight (Approx lbs.)
D4B 1½ Hp 4 6 20 35 1″ FNPT 1/2″ FNPT 50″ x 28″ x 39″ 650
D4C 2 Hp 8 12 21 36 1″ FNPT 1/2″ FNPT 50″ x 28″ x 39″ 675
D4F 3 Hp 15 20 22 37 1″ FNPT 1/2″ FNPT 50″ x 28″ x 39″ 700
D4E 5½ Hp 27 34 26 41 1½″ FNPT 1/2″ FNPT 50″ x 28″ x 39″ 720

*460 Volt, 3 Phase, 60 Hertz (for 230 Volt, double the listed amps).

Available in a variety of voltages and capacities. Please contact Mokon for more information.