The Clayton Guide To Steam Generation

The Clayton Guide To Steam Generation
Courriel : [email protected]
Clayton Steam Systems is a world leader in the design and manufacture of compact,
high efficiency, rapid start steam systems that are safe to use and are of advanced designs.
The Clayton Company was founded in 1930 and reorganised
under the name of the Clayton Manufacturing Company in
1935 to investigate and develop new concepts in
thermodynamic and mechanical products. The Clayton
Steam Generator was the first such product and was
conceived as a packaged, force circulation coil steam
generator that could automatically produce steam in five
minutes from a completely cold condition.
The Clayton Steam Generator is of a unique design where
high efficiency and rapid start-up are combined with high
steam quality and fast response to changes in steam
demand. In addition, the low blowdown requirement saves
energy, water and treatment chemicals. The operating
principle of the Clayton Steam Generator has eliminated the
need to contain and heat large quantities of water.
Consequently all generator models are small in size and
weight and can be accommodated within a limited space.
One of the major safety advantages of the small water content is
that there is no possibility of a steam explosion from a Clayton
Steam Generator.
The energy saving features of the Clayton Steam Generator was of
considerable interest to William Clayton who was concerned with
fuel conservation long before the modern day awareness and
effects of energy use.
The Clayton Exhaust Gas Boiler operates on the same tried and
tested principles and has been produced to satisfy a variety of
industrial and marine applications to recover heat from waste gas.
Designs are continually being improved and developed as well as
being upgraded to incorporate the latest engineering technology
and techniques. The range of sizes has been added to over the
years and it is now no longer necessary to use the traditional fire
tube boiler for outputs in excess to 60 tonnes of steam per hour.
The many advantages of the designs make Clayton Steam Systems ideally suitable
for any steam application.
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The Old Steam Age
Steam was the driving force during the days of the industrial
revolution and was used to power the giant textile mills, steam trains
and ocean going ships of the time.
In those days steam boilers were just like the common
domestic kettle where a volume of water is heated in a
container and steam is ejected through the spout.
One such steam boiler design was the famous Lancashire Boiler that was the most advanced of it’s
time. In this boiler coal was used as fuel to heat two ‘firetubes’ which in turn heated the water that
surrounded them. As the temperature of the water rose, steam bubbled off the water surface and into
the steam pipe.
However one of the many drawbacks of the old firetube design was the explosion hazard that caused
death and serious injury with alarming frequency. These tragedies were regarded as acts of god in
those days but we now know that they were a consequence of this particular method of steam
production. The hot water is stored inside a firetube boiler at the same pressure as the steam and a
failure of the outer casing will cause the water to expand to around 1600 times its volume in less than
a second - causing a devastating explosion. This is most likely to happen when the water level in the
boiler drops to a dangerously low level.
It’s not difficult to imagine the second disadvantage which is the time it takes to heat up in the first
place. This is measured in hours rather than minutes because the large mass of steel and water must
first be heated before the steam pressure can build up. This means that boilers had to be started well
in advance of when they were needed - or had to be kept ticking over so that they were available
when steam was required. The inherent lag in response also meant that the boiler had to be large
enough in size to cater for varying outputs.
These old boilers are early versions of the firetube boilers that are the horizontal cylindrical shape we
still recognise today. Improvements in the firetube design have, of course, been made where
But why didn’t someone come up with a different method of producing steam that
does not have all of these disadvantages? - Well Someone Did!
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The New Steam Age
Instead of heating a large amount of water and steel - heat a small amount of water and steel.
This is possible by pumping water through the inside of a small
diameter heated coiled tube so that cold water goes in one end and
high pressure steam comes out the other. The Clayton Steam
Generator is a unique design that does just that. Instead of the familiar
steam train image of a boiler we now have a compact steam making
machine with staggering advantages for the world we live in today.
The Clayton Steam Generator uses only three main components.
These components are a special pump, a special water tube coil and a
special steam separator. Water is heated as it is pumped through the
coil and it is then fed to the to the steam separator to produce very
high quality dry steam.
So all of the momentum from the heavy steel and large volume of water
has been eliminated which means that the boiler is small in size and
will start-up in five minutes from the flick of a switch. The response is
more like a racing car than an oil tanker when it’s running because the
steam flow is synchronised with the speed of the pump and the heat
source - so it can ramp up and down in seconds with unrivalled fuel
efficiency. And when it is not needed at the end of the working day it
can be switched off with the lights to conserve energy.
The basic operating principle produces one advantage that leads to another and another. These are
not limited to the quick start-up, rapid response, small size, low weight, low running cost automatic
operation, and reliability.
Many people consider that the main advantage of the Clayton Steam
Generator compared to a firetube boiler is that safety has taken a great
leap forward. This is because there is no possibility of a steam explosion.
It is not even necessary to check the water level – because there isn’t one.
So the peril that was a constant danger once-upon-a-time has now been
completely eliminated. In fact the Clayton Steam Generator can run
without operator attendance even at very high steam pressures and
Most of the world forward looking companies and institutions that use
steam in their production or process already operate Clayton Steam Generators.
The traditional horizontal cylindrical boilers image that made history has now made
way for high powered vertical Clayton Steam Generator of today.
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Principle of Operation
The Reason for the many advantages of the Clayton Steam
Generator is the Forced Circulation Monotube Coil Concept. This
operates on a simple but ingenious principle.
The boiler feedwater is pumped by means of a specially designed
Clayton Pump and is forced through a single heating coil from the
top to the bottom. The steam/water mixture from the outlet of the
coil is then passed to a high efficiency centrifugal separator. Steam
quality from a Clayton Steam Generator is up nearly completely dry
saturated and the separated water is re-cycled.
The Clayton Coil is of a unique design that has been developed for
optimum heat transfer at all steam output levels.
The coil is a single water tube which is stacked in spirally wound
layers in the upper section and forms a ‘water wall’ around the
combustion chamber of the lower section. The configuration of the
coil as well as the variation in the tube diameter, spacing between
layers and spacing between tube turns in different temperature
zones of the coil are all carefully designed to maximise efficiency
and prevent hot spots.
The spiral construction of the coil is extremely robust and
counteracts the effects of expansion during rapid heating and
cooling. In the case of oil fired units, sootblowing facilities are
provided to remove deposits from the outside of the coil while the
unit is in operation to keep it running at maximum efficiency.
The Clayton Pump is of a remarkable design and is manufactured
specifically to provide the forced circulation through the coil of a
Clayton Steam Generator.
The pump is a positive displacement type that ensures flow
stability over a wide range of varying pressure conditions. The
Clayton Pump does not rely on mechanical seals, packing rings or
glands to separate the water being pumped and the drive
mechanism. Operation is completely unaffected by high water
temperature and the construction of the Clayton Pump is extremely
robust, very reliable and low in maintenance.
On every Clayton Steam Generator the pumping rate is
synchronised to the burner firing rate so that the steam output can
be ramped up and down as required.
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Principle of Operation
The Clayton Steam Separator is a high efficiency centrifugal
design that has no moving parts. The very high steam quality is
produced even under variable load conditions and is at least 99.5%
dry saturated.
The steam/water mixture from the Clayton Steam Generator is
directed to the inlet of the separator where it is directed over a
series of vanes and separated by means of centrifugal force. The
water is collected and dry steam is discharged through the top
outlet. The blowdown from a Clayton Steam Generator is
extremely low since this is taken from the water collected by the
The Clayton Burner is specially designed to ensure that the flame
is confined to the combustion chamber and that combustion is
complete before the hot gasses are released over the coil.
To achieve this, the air for combustion enters the burner manifold
at high velocity where it picks up fuel in a whirlpool action to form a
heart shaped flame where the flame tip folds over into the low
pressure zone. Fuel and air are blended in precise ratios and the
burner fires upwards, which is the natural direction for heat.
The Clayton Advantage
High Efficiency
Counter Flow
Heat Loss
High Performance
Steam Separator
Positive Displacement
Floor Level
Burner Unit
All Around
Air Space
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Very high efficiency is the most obvious
benefit that comes from small sizes
because of the low heat losses. Heat
flow is upwards - in the opposite
direction to the water flow - and this
optimises heat transfer and results in
low running costs.
Start up from a completely cold
condition is five minutes. Warm up fuel
is minimised and the unit can be
switched off when not required. The
Clayton Steam Generator is therefore
also ideal when used as an auxiliary or
standby boiler
Steam quality is the best available from
any type of boiler and is at least 99.5%
dry saturated at all steam loads. This
reduces the amount of water and
impurities going into the steam line and
ensures higher energy content of the
process steam.
Blowdown which is necessary to
prevent the build up of impurities in all
types of boiler is extremely small with
the Clayton design. This saves fuel,
saves chemicals and saves water.
Because of the inherent safety and
automatic systems all Clayton Steam
Generators can be supplied to run
without operator attendance for up to a
period of one week if the unattended
control option is included.
The compact size means that minimal
space is required for a complete boiler
house. Building costs are reduced and
a Clayton system can easily be fitted
into the available area. The light weight
even allows location on an upper floor
It is not possible to have a steam
explosion. This is a danger associated
with low water level in other types of
boiler that store a large volume of hot
water. The Clayton Steam Generator
does not have a water level and does
not store a large volume of water.
Extremely rapid response to changes in
the demand for steam is inherent in the
forced circulation design. A Clayton
Steam Generator will speedily ramp up
or run at maximum steam output
continuously without faltering.
The rapid start and rapid response can
be controlled automatically. All Clayton
systems can be started by a single
switch locally or remotely just like any
modern advanced machinery - if the
automatic start option is included.
One of the practical benefits of the
simple design concept is that
maintenance requirements are minimal.
The technology has been developed
and improved over many years to make
the Clayton Steam Generator the most
reliable steam boiler available today.
Movies can be viewed on our website
Unless you have experienced a firetube boiler explosion
personally it is hard to imagine the enormous destructive
potential of steam. In a firetube boiler (shell boiler) a large mass
of water is stored in a cylindrical vessel and heated to form
steam. A faulty firetube boiler is just like a time bomb. It can
produce a near instantaneous, uncontrolled, release of energy.
Fortunately, due to government legislation and established
design codes as well as proper operator training and
sophisticated control systems these explosions are now much
less frequent than in days gone by. But there can be no cast iron
guarantee that a disaster will not occur.
Overheating caused by low water is the most frequent cause of boiler explosions, or other damage.
The most important job of the firetube boiler operator is to make sure the water level is correct at all
times. In contrast a Clayton Steam Generator does not have a water level and it is not possible to
have a steam explosion with the Clayton design.|
Clayton famously demonstrated this when they tested
a 500 boiler horsepower steam generator to
destruction after removing all of the safety devices
from the unit. This demonstration took place in front of
an invited audience, including inspectors from the
Technical Standards and Safety Authority of Ontario,
Canada. The test was recorded on video.
The operating principle of the Clayton Steam Generator is very different from that of the firetube
boiler. A firetube boiler uses natural convection for heat transfer and subsequently it must store a
large amount of energy in the form of high pressure hot water.
The Clayton Steam Generator, by comparison, uses forced circulation of water though a helical coil
which is heated to produce steam. It follows therefore that there is relatively little water in a Clayton
Steam Generator contained within the coil.
Even if the coil of a Clayton Steam Generator is damaged in any way this cannot
produce a dangerous condition.
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Steam Systems
Systems and equipment that ensure trouble-free operation of the steam generating plant are
designed with the same Clayton experience and expertise. Clayton offers a range of ancillaries and
packages to match the selected steam generators and manufactured to the same high standards.
The most common system is the Clayton Open System in which condensate can be returned at
atmospheric pressure. In the Open System, boiler feedwater is directed from an atmospheric Hotwell
to the Clayton Pump and is fed to the Clayton Steam Generator. Steam flows from the Clayton Steam
Separator outlet nozzle through a backpressure regulating valve and the condensate from the
separator is re-circulated back to the hotwell. The small amount of blowdown required on a Clayton
Steam Generator is taken from the recirculation line. The make-up water supply can be passed
through a water softener and chemicals can be dosed directly into the hotwell.
On multiple Clayton Steam Generator installations the feedwater equipment is common to all. Other
tried and tested designs include the Clayton Closed and Semi-Closed Systems that are used where
energy savings from condensate heat recovery is required.
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Steam Systems
High Pressure and Superheated Steam supply is another application where the
design of the Clayton Steam Generator is perfectly suited. The small diameter water tube coil allows
steam pressures of up to 200 barg to be produced and the helical heat exchanger concept means that
superheated steam can be generated up to temperatures of 460 degrees centigrade.
The spiral construction of the Clayton heating coil means that it is
extremely robust and will counteract any effects of expansion and
contraction during rapid heating and cooling cycles without
experiencing any mechanical damage.
On Superheated Clayton Steam Generators the feed water is
directed to the topmost layer of coil where it is pre-heated as it
spirals downwards and fed to the lower section from where it
passes to the high efficiency steam separator. Dry steam from the
separator is then directed to the integral superheating coil section
where the desired steam temperature is produced.
Power Stations have benefited by using the
Clayton Steam Generator where superheated steam, high
pressure steam and rapid start capability combined with the
inherent safety have particular benefits. In both
conventional and nuclear power stations the Clayton Steam
Generator is used for peak shaving, auxiliary start-up
steam, back-up steam supply and emergency steam.
When used as an auxiliary start-up boiler the Clayton Steam
Generator enables a power plant to be brought on-line
rapidly which means lower emissions, less fuel
consumption, less water consumption, less chemical
consumption, less electricity consumption and provides increased revenue as well as the commercial
advantage that comes from having the flexibility of being able to start-up quickly.
Marine & Offshore Steam Systems are ideal applications where the
safety, space saving, unmanned operation, reliability and modular construction have
made Clayton the offshore standard for ships and offshore oil platforms. The Clayton
Marine Steam Generator is type approved by many marine authorities and can be
supplied to the requirements of any inspection agency.
Clayton’s own marine standard includes specified materials, control systems, electrical motors,
cabling, tagging, documentation and other essential features required in this demanding industry.
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Ancillary Equipment
Clayton Hotwells are designed to perform several essential functions. The Clayton Hotwell provides
feedwater for the Steam Generator acts as a reservoir for returned condensate and is an ideal means
of blending water treatment chemicals. An important feature of the Clayton hotwell is that it is a partial
deaerator capable of removing most of the oxygen - which is the major cause of corrosion in
feedwater. The hotwell is steam heated to maintain a controlled temperature of around 90 to 95 C
and the residence time is calculated to ensure that the oxygen
level is significantly reduced.
Clayton Hotwells are available as either horizontal or vertical
vessels. All are supplied complete with special inducer tubes,
temperature control, automatic level control and automatic filling.
For large steam flows, high pressure steam or superheated steam
system the Clayton Thermal Deaerator may be recommended.
Clayton Back Pressure Regulating Valves can be provided with each steam generator
to control the minimum pressure of the generator in response to the pressure sensed by
an impulse line on the downstream side. The purpose of the valve is to ensure stable
operation under fluctuating loads and is used as part of the Clayton Automatic Start
Clayton Chemical Dosing Systems will maintain the correct water quality which
is a requirement of all types of steam raising plant. The systems incorporate a
chemical storage tank which is sized for the Clayton Steam System and microprocessor controlled diaphragm chemical injection pump to accurately meter the
amount of chemical used. The chemical dosing system will ensure long life of
the equipment.
Clayton Water Softeners are of the automatic ion-exchange type that remove hardness
from the raw feedwater. Because water softeners must be periodically regenerated these
are available as single (simplex) units on plants where the Clayton Steam Generator will
be off during regeneration and as double (twin) units for continuous or long running
periods of the Clayton Steam Generator.
Regenerations of simplex water softeners are instigated on an operator-set time basis
and twin softeners are fitted with a micro-processor which allows regeneration to take
place in proportion to water usage.
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Ancillary Equipment
Clayton Water Test Kits provides a simple and practical means of measuring the
quality of the feedwater supply to the Clayton Steam Generator. The kit includes
the necessary equipment to carry out tests for water hardness, levels of oxygen
scavenger, dissolved solids and pH.
Full instructions for use are included with the kit and a Clayton Feedwater
Treatment Manual is available which provides information on the water quality required and how this
is achieved.
Clayton Booster Pumps will ensure that the minimum net positive suction head is maintained
for the main Clayton Pump where the hotwell is mounted at low level. Booster pumps are
selected to suit the generators being supplied.
Clayton Blowdown Vessels are designed to safely handle the discharges from the automatic
or manual blowdown systems on the Clayton Steam Generator. Blowdown vessels can also
be supplied with discharge cooling systems if required.
Clayton Water Treatment Chemicals are specially formulated to maintain the correct water conditions
to protect the Clayton Steam Generating System. The use of these chemicals will guarantee trouble
free operation and long life of the equipment. Chemicals are available in powder or liquid form and are
easily dosed using the Clayton Chemical Dosing Systems.
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Skid Mounted Boiler Rooms
Clayton Steam Generator Systems can be
supplied as separate modular units for installation on site or supplied
as pre-assembled packages - or even as complete Skid Mounted
Boiler Rooms which save installation time and on-site costs.
Each package is compact, easily transported and quickly installed.
The systems can be supplied from our standard range or specially
built to the customers’ requirements. Fully automatic control can be
included as well as monitoring devices, feedwater conditioning and
all the necessary fittings, pipework and electrical wiring.
Feedwater Treatment Skid
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Containerised Boiler Rooms
The Clayton Containerised Boiler Room is a
completely weatherproof steam supply system that can be quickly
connected on site and easily re-located when required. The small
size of the Clayton Steam Generator makes it ideal for this type of
construction and systems can be supplied as standard or custom
built designs.
All containers are of a heavy duty, weatherproof construction and
customised with openings, flooring, bracketing and doors as
necessary to suit the application. The Clayton Steam Generator,
along with other Clayton ancillary equipment such as the hotwell
tank, water softener, blowdown tank, chemical dosing system, valves, controls, instrumentation,
pipework and electrical wiring is installed by our specialist factory technicians and all equipment used
is of the highest quality.
Some of the options that are available include, aluminium flooring, insulated walls, acoustic air intake
dampers, automatic combustion air dampers, frost protection, cooling, lighting, fire protection and wall
insulation. The outer surface of the container is shot blasted and coated with an epoxy paint system
with a final colour of the customer’s choice.
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Range of Sizes
The Clayton Range of Steam Generators are suitable for
all steam application and can run on natural gas, LPG, light oil, heavy fuel oil and
are available as duel fuel oil/gas versions.
Very high steam pressures are available on standard models and special models
that provide steam pressures up to 200 barg can be supplied in most sizes.
Other options include superheated versions, economiser sections to improve
efficiency even further, low NOx models as well as marine and offshore versions.
Steam Flow
Max Load
*F&A Values
More details are shown in the data sheets.
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Exhaust Gas Boilers
The Clayton Exhaust Gas Boiler was developed following the success of the
Clayton Steam Generator and the design is based on the same tried and tested operating principle.
This results in an Exhaust Gas Boiler of small size and weight that can produce steam of very high
An added advantage of the Clayton Forced Circulation Monotube Coil Concept
is that is not necessary to rely on any type of fins on the tube surface to assist
heat transfer and this reduces the possibility of clogging with exhaust gas
deposits. The configuration of the Clayton plain coiled tube is designed to
maximise performance and allow free flow of hot gas over the tube in the
opposite direction to the water flow in a counterflow pattern for maximum
Due to the small size and weight of the Clayton Exhaust Gas Boiler a number
of installation options are possible and the boiler can be fitted into the exhaust
gas ductwork to suit the client’s requirements.
The Clayton Exhaust Gas Boiler can produce steam using the heat in the
waste gases from diesel engines, small gas turbines, incinerators, glass
furnaces, enamel ovens, stress relieving ovens and other suitable
On marine installations the Clayton Exhaust
Gas Boiler has been used extensively for
over 40 years to recover heat from the
exhaust of main propulsion and power
generating diesel engines. On-board ships
a separate oil-fired Clayton Steam
Generator is often supplied in conjunction
with the Clayton Exhaust Gas Boiler for use
when the vessel is in port.
Diesel engines on electrical generators of sizes up to 15 MW of electrical
power are ideal for heat recovery using the Clayton Exhaust Gas Boiler these
include light and heavy oil fired engines, gas fired engines and dual fuel units
of 4-stroke and 2-stroke design.
Heat can be recovered on gas turbines up to 15MWe
The Clayton Exhaust Gas Boiler is also ideally suitable for many other
applications depending on flow and temperature.
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Exhaust Gas Boilers
Construction of the Clayton Exhaust Gas Boiler is modular and a range of standard coil
sections have been developed to suit a wide variety of process conditions. The sections are chosen
for optimum performance by computer programme, based on the
heat available, the steam output required and the allowable pressure
Because of the modular construction of
the Clayton Exhaust Gas Boiler the
assembly is a straightforward matter since
the standard coil sections are bolted
together and coned transition pieces are
then added onto each end for connecting to the exhaust ducting. The
water connections between each section are made on the outside of the
boiler shell and an effective sootblowing system is built into every Clayton
Exhaust Gas Boiler.
Clayton Exhaust Gas Systems have been devised to suit numerous
processes. On all designs the water is pumped through the steam
generating coil and the steam/water mixture produced at the outlet of the boiler is directed to a vortex
separator which can be housed in a separator or accumulator.
More than one Clayton Exhaust Gas Boiler can be connected to a single accumulator. A feature of
every system is that means are provided to avoid dew point corrosion of the tubes to prolong the life
of the boiler.
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Customer Care
Service for Clayton Steam Generators and Exhaust Gas Boilers is available worldwide in more
than 100 countries to provide commissioning, preventative maintenance, and advice to customers.
Clayton operate round-the-clock service 24 hours a day, seven days a week and 356 days a year.
Our after sales service is second to none and all of our engineers are dedicated trained specialists for
all Clayton products. In addition all engineers are fully trained and certificated and are familiar with
site-safety practices and permit-to-work systems.
Advice on installation requirements is available from Clayton engineers and our comprehensive
installation manual gives general guidance to installers. Electrical and mechanical drawings are also
provided for every unit.
Preventative Maintenance Contracts are arranged for many of our customers and these are based on
regular visits by our engineers to carry out scheduled maintenance tasks to ensure optimum
performance and efficiency. Our engineers are also available for strip-down and refit work associated
with insurance inspections. Service contracts can be tailored to suit customers requirements and can
range from labour only contracts to complete parts and labour maintenance contracts.
Commissioning services are available for equipment on-site and Clayton engineers carry out all
necessary safety and operational checks and full commissioning services. Operator training is also
available and customised training courses can be arranged if required.
Spare Parts are held in stock in many areas of the world and these are available for immediate
despatch. Any spare can be provided based on our comprehensive records of every unit supplied. We
can also advise on customer spare stocking policy to minimise downtime if required.
Training on Clayton Steam Systems can be seminar format or site based, hands-on instructions. The
main topics include operating principle, water/steam/fuel system, safety precautions, electrical
system, routine maintenance, fault diagnosis, water testing and regular checks. The content of the
course can be varied to suit the level of competence of the participants. Technical literature is also
provided and a certificate is issued to each student.
Clayton reserves the right to make alterations to designs and equipment without notice and the information sketches and
photographs contained herein is intended as a general guide only. Clayton Industries make no claim as the accuracy of
the steam tables or any other data and independent verification of all data should be sought by any person using this
information for any purpose.
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Clayton Worldwide
Clayton Steam Systems is a worldwide company with four manufacturing and a vast
network of subsidiary companies and distributors throughout the Globe.
Manufacturing Plants
160, rue du Tuboeuf
Tél. : + 33 (0)1 64 05 38 24
Fax : + 33 (0)1 64 05 24 37
[email protected]
Clayton Sistemas De Vapor S.A
C/Vallespir nº19, Edificio Octavia,
08173 Sant Cugat del Valles
Tele: +34 93 576 35 79
Fax: +34 93 517 90 70
[email protected]
Clayton Industries
World Headquarters
17477 Hurley Street
City of Industry, CA 9174-5106
Tele: +1 626 435 1200
Fax: +1 626 435 0180
[email protected]
Clayton of Belgium NV
Europe, Africa Middle East
Rijksweg 30
B-2880 Bornem
Tele: +32 (0)3890 5700
Fax: +32 (0)3890 5701
[email protected]
Clayton De Mexico, SA. De CV.
Manual E. Stampa 54
Nueva Industrial Vallejo
Mexico D.F., 07700
Tele: +52 (55) 5586 5100
Fax : +52 (55) 5586 2300
[email protected]
ClaytonThermal Products Limited
5, Boleyn Court - Manor Park, Runcorn
Cheshire, WA7 1SR
United Kingdom
Tele : + 44 (0)1928 579009
Fax : + 44 (0)1928 571155
[email protected]
Clayton Nederland BV
Clayton Nederland B.V.
B-2880 Bornem
Tele: +31 (0)078-613 98 11
Fax: +31 (0)078-613 93 47
[email protected]
Clayton Deutschland GmbH
Lindemannstr. 75
D-40237 Düsseldorf
Tel: +49 (0)211 233 979-0
Fax: +49 (0)211 233 979-22
[email protected]
Clayton Canada
13 Edvac Drive, Unit 19
Brampton, Ontario
Tele: +1 (905) 791-3322
Fax: +1 (905) 790-0583
[email protected]
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