steam heat exchanger

MCU-UP Model: Steam To Hydronic Ultimate Package

Complete Plug & Play Steam Flooded Heat Exchanger Package

Easy Install, Low Maintenance, Low Footprint, Easy Operation, Energy Savings

steam to hot water skid package

Can be used with high or low steam pressure.No need of steam
safety relief valve, no vent to the roof No need of condensate pump
the station, no vent to the roof Minimum 5% less steam usage compare
to a conventional steam heat exchanger Only one (1) moving part, the
control the valve on the condensate (1/2” up to 10 MMBTU process)
Complete automatic control system. No need for manual assistance even
on cold start-up! Touchscreen control panel including values like actual BTU
per hour and Gallons per Minute Some Customers: Harvard, Miller Coors,
Merck, Dupont, John Hopkins Hospital, Duke and Many More

Simply Fill The Form Below

We Will Get Back to You Shortly With Overall Dimensions, Connections Size and Potential Annual Energy Savings

ASME Code Only vs TEMA  - A Brief Comparison 


ASME Section VIII, Division I is a safety Code that was originally developed in the 1930’s and covers all types of pressure vessels, including tanks, columns, towers, reactors, and Shell & Tube Heat Exchangers (HX).  It sets minimum requirements with respect to thickness of components and methods of fabrication and testing for the safe operation of a particular piece of relevant equipment.

The TEMA Standard – which stands for the Tubular Exchangers Manufacturers Association – is a specific set of both safe design standards, as well as supplemental requirements and best practices aimed at not only ensuring the safe operation of a Shell & Tube heat exchanger at given conditions, but also that the HX will have a longer life-span than if were fabricated as “Code Only”.  In short, when a HX is fabricated in accordance with the TEMA standards, it is a heavier duty product than Code Only.  


Given:  A 12” Nominal Shell & U-tube Heat Exchanger, designed for 150 PSIG working pressure, to be used in a typical HVAC Steam to Water application.

Shell Thickness- Code Only:  0.190”   TEMA Min:  0.375”   TEMA is 50% heavier duty

Tube Thickness- Code Only:  0.035”  TEMA Min:  0.049” TEMA is 30% heavier duty

Gasket Width – Code Only: Not Addressed    TEMA Min: 0.625” to ensure effective seal

# Tie-Rods in Tube Bundle to ensure adequate stiffness – Code Only: Note Addresse , TEMA Min:  (4) Tie-Rods


Obviously it is not possible to cover all aspects of the differences between a Code Only heat exchanger, and one designed and fabricated to the TEMA standards in just a few short lines.  But when specifying a shell & tube heat exchanger, requiring that it be built to the TEMA standards in addition to ASME Code Only will ensure that the equipment will be fabricated in accordance with the standard that has achieved worldwide acceptance as the authority on the thermal and mechanical design and fabrication of Shell & Tube Heat Exchangers.  

When purchasing a heat exchanger, if using heavy duty equipment built to last for years of trouble free service is important to you, ask yourself:  Is your heat exchanger Code Only?  Or is it TEMA?

Main Components Included on a Complete Skid Package

  • Two (2) or one (1) vertical U-tube heat exchanger, with carbon steel shell construction, 90/10 CuNi u-tubes of 3/4” OD x 0.049’’ wall and SS304 tube sheet. Steam side to be ASME stamped for 150 psig @375F, liquid side to be ASME stamped for 150 psig @375F. Heat exchanger shall have ANSI 150# flanged connection on steam inlet, condensate outlet and liquid inlet and outlet. TEMA-C construction standard.
  • Circulating pumps in redundancy (qty = 2 + 1 standby, each sized for 50% of the load), each for 600 usgpm @ 80’ TDH, Grundfos-LCS Base Mounted end-suction 20 HP pumps, pre-wired to the control panel
  • Control panel with VFD, by-pass and disconnect for each pump, including
  1. 1
    Enclosure NEMA12
  2. 2
    Main disconnect switch
  3. 4
    Control transformer with primary/secondary fuses
  4. 5
    Drive Schneider Altivar 61 series
  5. 6
    Door mounted keypad for drive configuration and monitoring
  6. 7
    Required contactors, relays and timers for drive by-pass sequence when needed
  7. 8
    Fast acting type J fuses for drive protection
  8. 9
    Time delay type J fuses for by-pass sequence through contactors
  9. 9
    Selector switch for MAN-OFF-AUTO mode
  10. 10
    Pilot light POWER ON
  11. 11
    Pilot light MOTOR OVERLOAD
  12. 12
    Pilot light BY-PASS CONTACTOR
  13. 13
    Pilot light RUN VFD
  14. 14
    Pilot light FAULT VFD
  15. 15
    Junction terminals
  16. 16
    Wiring diagram
  • Suction diffuser on each pump
  • Triple duty valve on each pump
  • Air separator on the liquid with air eliminator
  • Isolation valves as required
  • Thermometer at liquid inlet and outlet, thermowells included
  • One (1) modulating electric control valve on condensate outlet of each Hx, fail safe, pre-wired to the control panel
  • One (1) over heat security valve on the steam inlet of each HX, high performance butterfly type with ANSI 150 lugged pattern and electric actuator with position feedback and power back-up, pre-wired to the control panel
  • One (1) start-up valve on the steam inlet of each Hx, on-off and fail closed, pre-wired to the control panel
  • One (1) pressure transmitter on the steam inlet of each Hx, pre-wired to the control panel
  • One (1) flow sensor on the liquid side of each Hx, pre-wired to the control panel
  • Electric temperature sensor on liquid outlet, pre-wired to the control panel
  • Pressure transducer on steam inlet, pre-wired to the control panel
  • Flow sensor on liquid inlet & outlet, pre-wired to the control panel
  • (2) NEMA 4 BACnet IP control panels with an industrial type programmable PC and touchscreen user interface. The panels are pre-programmed to perform the start-up and shut down procedures as well as alarms managing and lead-lagging. The control panel is provided with the sensors required in the sequence of controls. Remote access to the parameters via Internet is accomplished using an Ethernet connection, allowing an easy troubleshooting by the factory. All parameters to be adjustable via the building automation system. BACnet IP, BACnet MS/TP and LONworks communication protocols are standard. The panel is factory mounted & tested prior to shipment and is CSA-US approved. Remote access to the panel by the customer must be permitted
  • One (1) high performance uninterruptible power supply (UPS) feeding power to the two (2) control panels. The UPS provides protection for electronic equipment from utility power blackouts, brownouts, sags, surges, small utility power fluctuations and large disturbances. The UPS also provides battery backup power for connected equipment until utility power returns to acceptable levels or the batteries are fully discharged. Skid shall have complete operational power for a minimum of 5 minutes.
  • One (1) main power distribution panel for single point of connection power supply by the electrical contractor. This panel powers the pumps and control panels
  • One (1) steam trap on the condensate outlet of each heat exchanger
  • Maxi-Therm condensate mixer (item E) with integrated SS316 check valve
  • One (1) strainer 100 mesh with blowdown valve on the condensate outlet of each heat exchanger
  • Liquid & steam piping in carbon steel SCH40 and condensate piping in carbon steel SCH80
  • Heavy duty painted steel frame
  • All components are covered by a 24 months limited warranty effective on date of shipment or 18 months after original start-up, whichever comes first.

Items delivered separately to be installed on jobsite by contractor (see drawing attached) :

  • Steam trap as a drip trap (items F)
  • Two (2) vacuum breaker, stainless steel construction (item I)
  • Two (2) air vent (item D)

A single connection will be provided for the liquid inlet and outlet, steam inlet and condensate outlet.

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