PACKAGED SYSTEMS - Steam Boilers
Overview
- Steam Pressures to 235 psig
- Hot Water Temp. to 240°F
- Steam Capacities to 4,890 Lbs/Hr and 235 psig
- 3 - 1,620 kW (10 - 5,527 Mbh)
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Applications
Chromalox Packaged Electric Steam and Hot Water Boilers are safe and versatile heat
sources that produce low or high pressure steam or hot water for commercial and
industrial processes and for comfort heating applications. Chromalox electric boilers
can be used anywhere steam is required and electric power is available. They are
packaged units that operate from existing distribution voltages, making installation
simple.
Electric boiler applications encompass all types of commercial and industrial enterprises
such as hospitals, breweries, surgical centers, bakeries, utilities, etc. Chromalox
electric boilers are used for food processing, humidification, sterilization, process
drying and particularly in the manufacture of chemicals, paints, paper, textiles,
petroleum products, pharmaceuticals and plastics. Some specific applications
- Supplying steam for storage tanks and jacketed vessels to process
waxes, paraffin, glues, resins, varnishes, dyestuffs, molasses and vegetable oils.
- Supplying steam for reaction and distillation vessels, retorts,
autoclaves and sterilizers.
- Supplying steam for pipe tracing, to keep viscous materials flowing
in asphalt plants, in fuel oil lines, jacketed pumps, strainers and valves and provide
antifreeze protection.
- Supplying steam to heat rolls for paper coating, calendering,
laminating, corrugating and embossing.
- Supplying steam heat for platens, dies and molds used for laminating
wood and plastics, molding and forming of elastomers and plastic materials, plastic
extrusions and curing of epoxies and Fiberglas® materials.
- Supplying steam for comfort heating and humidification.
Boiler Selection
Chromalox steam boilers are available in the following ranges to accommodate any
process or application: 3 to 1620 kW, 9 to 4883 pounds of dry saturated steam per
hour, 0 to 235 psig.
Boiler selection is usually based on the operating pressure (psig) and steaming
capacity (Lbs/Hr). When the pressure or temperature and kilowatt rating or Lbs./Hr.
of steam requirements are known, the recommended boiler can be determined from the
following Boiler Selection Chart. If these operating parameters are not known, contact
your Local Chromalox Sales office for assistance in calculating the steam requirements
and for recommendations on the proper size steam boiler.
Steam Boiler - Selection Guidelines
Notes - 1. Mbh is ASME & ANSI standard for thought British thermal units per hour.
With the pressure and capacity known, con-Steam Boilers — Selection Guidelines
tinue the selection process by consulting the detailed product pages for the models
listed in the accompanying table.
Steam Boilers — Selection Guidelines
Maximum
Pressure
(psig)
|
Maximum
Temp.
(°F)
|
kW
|
Description
|
Model
|
Page
|
90
|
331
|
3 -15
|
Compact
|
CMB
|
D-29
|
90
|
331
|
16 - 20
|
Special
|
CAS
|
D-32
|
90
|
331
|
6 - 180
|
Vertical
|
CES-B
|
D-30
|
90
|
331
|
6 - 180
|
Stainless Steel
|
CSSB-A
|
D-33
|
135
|
358
|
150 - 1,620
|
High Capacity
|
CHS
|
D-35
|
235
|
401
|
6 - 180
|
Medium Pressure
|
CHPES-A
|
D-37
|
Optional Equipment
|
D-39
|
Custom Engineering & Manufacturing
|
D-42
|
Advantages
Chromalox Packaged Electric Boilers offer the advantage of electricity as the heat
source to provide low or high pressure steam or hot water. Building and installation
costs are reduced substantially over fuel fired boilers since fuel tanks, chimneys,
flues, vents and complex piping required for fossil fuel fired boilers are eliminated.
Packaged boilers comply with all the requirements of relevant UL and CSA Standards
and the ASME Boiler and Pressure Vessel Code. Boilers are completely assembled and
tested under operating conditions to rigid quality standards prior to release for
shipment. Chromalox electric boilers are ready to install and need only a water
feed source and an electric power hook-up to produce fast, economical high-quality
steam. Energy conversion efficiencies approaching 100% are possible.
Cleanliness — No fumes or products of combustion. Boilers may be installed in alcoves, under counters or in other restricted spaces.
Simple, Safe Operation mdash; Most electric boilers can be operated
by custodial personnel with a minimum of training.
Fast Start Up and Recovery — Boilers can be turned on and
be up to pressure within minutes. Long warm up times or complicated start up procedures
are unnecessary.
Minimal Maintenance — Electric boilers only require a periodic
or daily “blow down” to maintain their efficiency. (An optional automatic
blow down system can be purchased to ensure continuous reliability of planned maintenance.)
Reduced Operating Costs — Electric boilers can provide steam
“on demand” using automatically controlled electric power. Operating
costs can be controlled by reducing or eliminating “idling” or “standby”
operation when the boiler is not needed.
Electric Hot Water & Steam Boilers - General Specifications
Model
|
Description
|
Operating Pressure
|
Temp (°F)
|
kW
|
Mbh2
|
Vessel Pressure Rating (psig)
|
Connection Type
|
CMB
|
Compact Steam Boiler
|
0 - 90
|
212 - 331
|
3 - 15
|
10 - 51
|
100
|
NPT
|
CES-B
|
Vertical Steam Boiler
|
0 - 90
|
212 - 331
|
6 - 180
|
21 - 614
|
100
|
NPT
|
CAS
|
Special Steam Boiler
|
0 - 90
|
212 - 331
|
16 - 20
|
55 - 68
|
100
|
NPT
|
CSSB-A
|
Stainless Steel Steam Boiler
|
0 - 90
|
212 - 331
|
6 - 180
|
21 - 614
|
100
|
NPT
|
CHPES-A
|
Medium Pressure Vertical Steam Boiler
|
0 - 235
|
212 - 401
|
6 - 180
|
21 - 614
|
250
|
NPT
|
CHS
|
High Capacity Horizontal Steam Boiler
|
0 - 135
|
212 - 358
|
150 - 1,620
|
512 - 5,527
|
150
|
NPT and Flanged
|
GCH1
|
Steam Superheater
|
0 - 150
|
212 - 800
|
1 - 350
|
3 - 1,194
|
150
|
NPT or Flanged
|
Notes— See Circulation Heater section.
Mbh is ASME & ANSI standard for thousand British thermal units per hour.
Steam Boiler Features
- Steam Pressures to 235 psig
- Hot Water Temp. to 240°F
- Steam Capacities to 4,890 Lbs/Hr @ 235 psig
- 3 - 1,620 kW (10 - 5,527 Mbh)
- 120-600 Volt 1 & 3 Phase
- Pressure Vessels Carbon or Stainless Steel ASME Section I Carbon
Steel ASME Section IV
- Copper or INCOLOY ® Sheath Heating Elements
- Mechanical (Float) and/or Electronic (Probe) Water Level and Limit
Controls
- Optional Control Transformers, Water Feed Systems and Blow Down
Equipment
- Third Party (UL, CSA) Listing, Recognition or Certification
Typical Closed-Loop System

Features
Chromalox Electric Steam and Hot Water Boilers are efficient energy management systems
with specially designed heater bundles which provide maximum element to water contact
and uniform circulation. Low or high pressure steam is generated in pressure vessels
designed to minimize “carry over” of moisture and impurities into the
steam distribution system. Chromalox packaged boilers are compact in size with a
small foot print and are ideal for “point of use” applications in areas
with limited space. They are available in many sizes from stock.
Heating Methods
Most steam heating applications can be grouped into two categories, open loop and
closed loop. In an open-loop system, the waste steam and condensate are not recovered
and are exhausted to the drain. These are called “pass through” systems
and are frequently used for sterilizers. In a closed-loop system, the waste steam
and condensate are recovered and recycled through the boiler. Closed loop systems
are the most efficient and cost effective and are recommended for most applications.
Reliability — A rigid Quality Control Program is maintained
to assure compliance with the ASME Code, Underwriters Laboratories, Inc. requirements
and engineering design specifications. Each boiler is tested under power for functional
conformance, is subject to a high potential dielectric test, hydrostatic pressure
test and must pass a Quality Control inspection before being released
Optional Equipment
- Condensate Returns
- Blow Down Separaters
- Vacuum Breakers
- Cold Water Feeds
- Sequencers
- Control Transformers
Custom Engineering
Chromalox can design and manufacture your Packaged Electric Steam and Hot Water
Boilers. Contact your Local Chromalox Sales office.
Download the Steam Boilers Selection Guidelines