Shop Online
Customer Support
Search MHI
  • MHI Search
  •  

    Temperature Converter

    Enter a number
    & click on
    the "Calculate" button
    °F= °C

     

    One Atmosphere Boiler - Electric Superheated Steam Generator

    OAB™ Models

    OAB Models are available with single-phase and three-phase controls. 

    Easy to Install. Turn on-off as required. 

    Shown below is a three-phase scalable platform OAB system without enclosure.

    Each platform is individually controlled allowing significant flexibility of use

         

    Power and Temperature Panels with Safety Interlocks

    |Multi Zone | TRIPAN |  

    | HIPAN-2014 & XPAN-2014|BPAN-2014 |
    Industry tested MHI control packages include standard DACS 2 with USB download graphic display on panel

    Power Panels.

    Three Phase include 415/440/480/600V.  Single Phase include 115/120 208/220/230/240V.

    Typical Manifold Configurations

    Easy Flexible Connectors

    Vittori-Tubes Fitted to Steam Units

     

    MHI's One Atmosphere Boiler superheated steam boiler features patented InstaSteam™ technology, allowing for rapid startup times, unparalleled efficiencies and up to 1300°C temperatures. BoilerFree™ technology allows most OAB units to be installed without the need for traditional boiler certifications. The OAB® is ideal for use as an industrial steam generator, for dewrinkling operations, superheated steam drying and dozens of other specific applications requiring a high efficiency boiler that does not require boiler certifications.

    Pure Steam. Clean Steam. One Atmosphere Boilers generate superheated steam that is free of contaminants. The OAB's steam is ideal for pharmaceutical, cosmetics and other industries requiring the highest quality steam. OAB steam is also suitable for use as utility steam in many applications due to its high energy content. 

    Highly Scalable. OAB units can produce from 1kg/hr to over 1000kg/hr. Modular design allows for easy upgrades and utilizing the unit where it is needed, all without routing steam or venting pipes.  MHI is well known for high electronic power and temperature quality control panels.

    Compare Efficiency. Three types of efficiencies are important to consider.  (1)  the efficiency of the steam genereration device where the OAB® and MightySteam® excel; (2)  the efficiency of the downstream process that the steam is used for; and (3) the overall water usage efficiency and propensity to recycle the water. The one atmosphere steam-gas generator/boiler performs well in all three categories.

    How does one increase the rate of production?

    • Short Answer: Increase the temperature of the process gas or steam.
    • Long Answer: Please click to Steam Calculator page.

    Better conversion factors allow OAB units to use less resources to produce more steam.  A standard OAB steam output at 350°C, is almost at the theoretical efficiency of power conversion for the OAB steam generation!  The OAB's rapid start-up (generally with a minute from cold start) also adds considerably to the overall lowering of energy usage. 

     

    Getting to temperature quickly and faster results in lower operational wear and related costs i.e. an overall higher productivity with corresponding higher kinetics.  The output velocity of the 550°C OAB steam is very high - almost 40m/s or more.  This feature is used for the uniform heating of kettles/heat exchangers and for reaching large piping distances without significant loss of temperature.  For industrial vats and kettles, the heating rate makes a considerable difference to the overall process economics.  A general rule of thumb of productivity from traditional pressure boilers is - (0.35 Gallons of heated product like water)/kWhr.  For the OAB it is closer to - (1 Gallon/kWhr) i.e. almost three times (numbers may be lower or higher as they are situational dependent and one needs to evaluate on a case by case basis).

     

    The OAB offers a scalable design and because of the small foot-print qualifies for the MHI Never-Down policy.  The scalable design allows the user to choose what fraction of the boiler needs to be turned on on a given day or hour and changed at will.  MHI electronics provide full data logging, on-screen data acquisition display and a repertoire of 100 programs -  all in the small sophisticated control panel. How do Temperature and Pressure Impact a Steam Reaction? OAB® Compared to Traditional Boilers

    Request OAB Quote

    Steam Generator Comparisons

    Steam Generator Comparisons



    Feature One Atmosphere (OAB) Steam Water Tube Steam Boilers Electric High Pressure Steam Boilers
    Maximum Steam Temperature1 300-1300°C Standard.   Choice of Models. Sometimes up to 600°C with Economizer and Superheater. 134°C for 3 bar steam.
    Delivery to Initial Start up. Models are easily installed in a day and there is no anticipated wait for certicfications to start. Unknown. Small units could be plug and play.  Large units may require certiication time.
    Efficiency >95% <85-90% ~85-95%
    Idle Energy Waste Low (Choice of Continuos or On-Off steady-state steam) High Moderate
    Non Steam Producing Energy Usage Time
    (Start Up Time2) 
    Nearly Instant 60+ Minutes. Becomes slower with higher pressures and volume requirements ~60 Minutes. Becomes slower with higher pressures and volumes. (Not including cool down and pressure release for autoclaves)
    Suggested Inlet Temperature3 Tap 40-60°F 20-35°C
    Capital Cost per Kg of Steam3 Low.  Financing avilable when qualified. High Moderate. Depends on temperature/pressure required.
    Operational Costs4 Low even up to 1300°C. High Low-Moderate
    Unit Footprint Starting at 1'x1'x1'.  Small and remotely locatable power panels. Large Depends on size and pressure requirements.
    Plug & Play Operations Yes No No
    Requires Boiler Certifications5 No Yes Yes
    Downtime6

    Low (Unit can be used for continuous steady-state steam).  On account of the low foot print and modular designs the MHI-Never-Down Service™ is available for all steam units as applicable.

    Low-Moderate Low
    Utilizes Combustion7 (Requires Ventilation) No Yes No
    Energy Needed to produce 100 Kg/hr steam from cold start ~100 kWh @~350°C.  Water at Room Temperature to Steam. ~150-200 kWh Equivalent (Including start up time consumption).  Not always reported from room temperature water. ~150kWh Equivalent (Including start up time consumption). Not always reported from room temperature water.
    Power Weight [Kg Equipment/(Kg/hr) of steam] for a 100kW Generator ~2 Kg per Kg/hr of steam. ~5 Kg per Kg/hr of steam (Weight increases with temperature/pressure) -
    Maximum Work Potential (Based on second law limitation)  Base is 1 Bar 100C liquid water for all.

    672 kJ/Kg for 500°C superheated steam

    1973 kJ/Kg for 1300°C superheated steam

    755 kJ/Kg for 10 Bar saturated steam

    1169 kJ/Kg at 100 Bar saturated steam

    Generally not used for creating work.
    Enthalpy (heat) Content 3489 kJ/Kg for 500°C superheated steam at 1 Bar

    2777 kJ/Kg for 10 Bar saturated steam

    Saturation steam temperature 180°C

    2725 kJ/Kg for 3 Bar saturated steam

    Saturation steam temperature 134°C

    Running at Partial Capacity With MHI Electronic Controls, No loss of efficiency

    Significantly lower efficiencies, if model is capable

    Lower efficiencies

    Air Contamination Effects

    Extremely high operation temperatures diminish effects of air

    Air contamination harms output

    No air contamination is allowed (strict)

    Piping Losses Discrete, locatable units reduce necessary piping. The one atmosphere pipe can be better insulated and lighter. High pipeline pressure combined with long piping distances leads to heat loss and dangerous conditions in the event of pipe failure.  Pipes can be heavy. High pipeline pressure combined with long piping distances leads to heat loss and dangerous conditions in the event of pipe failure.  Pipes can be heavy.
    How far can I run my pipe?  Infographic.
    Typical Improved Efficiencies (Energy) Application dependent -  sometimes over 50% - -
    Improved Water Efficiency Application dependent -  sometimes over 50% - -
    Request OAB Quote

    1Maximum Steam Temperature obtained from production models; includes the use of superheaters.
    2Time from a cold start to reach maximum operating temperature.
    3Capital Cost per Kg of Steam calculated by dividing device output by device cost. Similar magnitude output devices are used. Prices used in calculations are general estimates obtained from public sources.
    4Operational Cost per Kg of Steam calculated by dividing output by resources consumed, excluding water. Resources assume prices of $0.09/Kwh and $5/1000 cuft for Natural Gas.
    5Boilers using high pressure vessels may require annual inspections and certification certificates especially when over 1 bar gauge. Pressure certificates, ASME and local government regulations however vary considerably and could change so please confirm with local authorities.  Please click here to review some of the codes posted on the web.  Steam generators that operate at One Atmosphere may not need certifications.
    6Most boilers require routine cleaning and inspections that impact uptime.
    7Combustion byproducts include NOx and other harmful gasses. Combustion restricts applications of many steam boilers.  Almost always, flame and pressure certifications codes if applicable are related to safety.

    Traditional boilers yield saturated steam (Tsat and Psat are linked). Boiler efficiencies increase with lower pressures. At 10 Bar the saturation temperature (Tsat~180C) is much lower than the basic OAB output temperature.  High temperature can almost instantly be achieved with the OAB and other MHI steam generators at a safer 1 bar pressure.  Regardless please take all precautions e.g. that include high quality safety glasses, non-porous insulated clothing, high temperature non-porous gloves, proper boots and all other safety equipment when in the presence of steam generators.

     

    If the steam is for heating purposes, please compare the enthalpy.  If the steam is for work purposes please use the work potential row below, the work potential increases with both temperature and pressure.  Work potential is measured from 25°C base temperature.  The cost of boilers increases for very high pressure ratings.  However even at 100 Bars the  saturation temperature is only 311°C.  Again a fairly easy and routine temperature from the OAB steam generator.

    1 Bar =100000 Pa = 14.5 psi

    10 Bar =1000000 Pa =145 psi

    100 Bar = 107 Pa = 1450.3 psi




    Models (Single and Three Phase Industrial Use)

    One Atmosphere Boiler OAB® Standard Models

     

     

    Single Phase 350°C Models

    (small foot-print)

     

           

    Easy to connect.  IBAN shown.

    Single Phase 550°C to 1300°C Models

    (small foot-print)

    One Atmosphere Boiler

    Easy to connect.  IXPAN shown.

    Model #  Amount of Steam Produced

    (Nominal)

    Total Electrical Power/Exit Temperature

    (Nominal Values Shown)

    OAB-4-350  4kg/hr

    ~ 4-6 kW

    Single Phase Model

    350°C

    OAB-12-350  12kg/hr

    ~12-14 kW

    Single Phase Model

    350°C

    Model # Amount of Steam Produced

    (Nominal)

    Exit Temperature

    (Nominal Values Shown)

    OAB-4-550

    OAB-4-750

    OAB-4-1300

    4 kg/hr

    550°C

    750°C

    1300°C

    OAB-12-550

    OAB-12-750

    OAB-12-1300

    12 kg/hr

    550°C

    750°C

    1300°C

    Pictures are for illustrative puposes.  Please contact MHI for a quote.

     

    Three Phase Models and MightySteam® Custom Solutions 

    High Flow and Special MightySteam® Applications

    Picture shows OAB-36 Scalable Platform Without Enclosure Cage

    Platform size 5' by 2.5'.

    Model Typical Applications

    Amount of Steam Produced

    (nominal)

     

    Total Electrical Power/Exit Temperature

    (nominal values Shown)

    Approximate financed monthly price when available

    (Please contact MHI for availability and other details)

    MightySteam-4 Solution

    (Custom Fit to Application)

     

    Foam Cutter

    Shrink Wrap

    Steam Disinfection

    Kettle Heating

    Pressing Irons

    4-6 Kg/hr Steam

    ~ 4-6 kW

    Single Phase Model

    300°C-750°C

    Custom Fit to Application

    $1000

    MightySteam-12  Solution

    (Custom Fit to Application)

    Foam Cutter

    Steam Disinfection

    Kettle Heating

    Shrink Wrap

    Smoothing

    12-13 Kg/hr Steam

    ~14 KW

    Single Phase Model

    300°C-750°C

    Custom Fit to Application

    $1100
    OAB-36

    Boiler

    Heat Exchanger Inputs

    Heavy Steam

    36 Kg/hr Steam

    About 39kW and higher depending on Temperature

    Models from 300°C-1300°C

    $1200
    OAB-72

    Boiler

    Heat Exchanger Inputs

    Heavy Steam

    72 Kg/hr Steam

    About 75kW About 39kW and higher depending on Temperature

    Models from 300°C-1300°C

    Contact MHI
    OAB-108

    Boiler

    Heat Exchanger Inputs

    Heavy Steam

    108 Kg/hr Steam Models from 300°C-1300°C Contact MHI
    Custom Custom Custom

    550°C

    750°C

    1300°C

    Contact MHI

     

    The kg/hr is nominal steam production rate.  Temperature and production rate are setting dependent.

    350 Models expected to produce steam temperature in the range of 300-380°C

    550 Models expected to produce steam temperature in the range of 500-700°C

    750 Models expected to produce steam temperature in the range of 700-900°C

     

    The output for the clean steam is easy to fit.  Sealant is provided for the user when attaching tubing for steam travel beyond the exit.  Vittori tubes which are insulated flexible tubing with connectors are also available from MHI.  Please Contact to request additional information.

    Water Flow Typical 1.5" NPT Outlet Nozzle  

    Easy to attach to all pipes.

    Assortment shown below.

    1.5 Threaded NPT Output Nozzle

     


    All control systems are industry tested.  Easy to Install and Use.

    Single Phase 220/240V (XPAN) or Three Phase  (TRIPAN) for Common World-wide Voltages

    Applications

    Applications


    One Atmosphere Boiler Suggested Applications
    Laboratory Steam Generator
    Pilot Plant Steam Generator for Possible Pharma Applications
    Steam Generator for Silicon Carbide Sintering On Demand Steam
    Electric Steam Generator.  Foam cutting high speed low power, no mess with thermal steam cutter Steam Bluing/Blackening for attractive surfacing
    Garment Pressing. Car seat pressing. Seats Pressing in rapid demand operations.
    Steam copper to start Good OxideMalakite Reduce contaminants in water pipes
    High Pressure Steam Boiler Process Steam for oil (normal and heavy oil) and natural gas
    Ultra High Purity Steam Superheated Steam Generator
    Consumer packaging labels.  Improved energy, less water use, improved speed and quality. Foam cutting.  Thick foam cutting speeds ~1"/s.
    Commercial Steam Boiler. Pure Steam Generator
    Superheated Process Steam Electric Superheated Steam
    Bakery Operation with on demand (on-off) steam Process Steam

    Steam Boiler

    for Steam Kettles, Processing Mash with Steam, Saving Energy and Materials.  Save considerable energy and time.  Generall from cold start cut up to 1/3 the time.

    Commercial Steam Generator

    Click on Media Tab Above for Pictures about Cleaning and Disinfection

    Industrial Steam Generator Tankless Instant Steam Generator
    Endotoxin Free Steam Industrial Steam Boiler
    Laboratory Superheated Steam Low Pressure Steam Boilers
    Electric Superheated Steam Generator High Pressure Steam Boilers
    High Temperature Steam Low Pressure Steam
    Low Pressure Steam Boiler Steam Generator Boiler
    Steam Roasting Electric Steam Boiler
    Electric Steam Superheater Steam Boilers
    Steam Reforming Hydrogen Wine barrel conditioning and reconditioning.   See also hybrid.
    Heavy Oil recovery with low energy and water input. Use in Oil storage and Oil tanker applications.
    Wood Conditioning for utility, packaging and hobby use. Safe kettle-heating for Breweries, Flavors and other such use Industries. 
    Energy efficient kettle heating for Breweries, Flavors and other such uses. Superheated Steam Drying
    Instant Steam Generator Superheated Steam Boiler

    Touch-up steam MS400-01 - 1Kg/hr of steam up to 400°C. Use for steam spray purposes only.

    Request OAB Information

    Compare the OAB to:
    Fire Tube Boilers Water Tube Boiler
    Industrial Boiler Gas Steam Boiler


    Traditional boilers yield saturated steam (Tsat and Psat are linked). Boiler efficiencies increase with lower pressures. At 10 Bar the saturation temperature is only 180°C.   This temperature can almost instantly be achieved with the OAB and other MHI steam generators at a safer 1 bar pressure.

     

    If the steam is for heating purposes, please compare the enthalpy.  If the steam is for work purposes please use the work potential row below, the work potential increases with both temperature and pressure.  Work potential is measured from 25°C base temperature.  The cost of boilers increases for very high pressure ratings.  However even at 100 Bars the  saturation temperature is only 311°C.  Again a fairly easy and routine temperature from the OAB.

    1 Bar =100000 Pa = 14.5 psi

    10 Bar =1000000 Pa =145 psi

    100 Bar = 107 Pa = 1450.3 psi



    Media Gallery

    Disinfection Studies, Videos, Cutting Nozzles and more.....no mess, low power and high speed use for from cutting to shrinkwrap.  Contact MHI for details.

    Steam-jet cleaning of glassware such as glass-vials with 550°C superheated high quality steam. Results from http://bayzi.com/ohio-state-presentation are only guidelines for biofilm elimination- please verify directly.

     

    MightySteam® is a Regsitered Trademark.

    OAB® is a Registered Trademark.

    MHI-INC

    750 Redna Terrace
    Cincinnati, OH 45215, USA
    Telephone: 513-772-0404 | Fax: 513-672-3333

    © Micropyretics Heaters International Inc. 1995 - 2014

    Follow MHI on

    LinkedIn  Twitter  Facebook  YouTube