industrial & commercial applications -...

Industrial & Commercial Applications

As one of the acknowledged pioneers of high pressure water mist technology, Danfoss Semco

has gained vast experience from its many installations across the world.

For more than 13 years, Danfoss Semco has worked successfully with high-pressure water mist

for commercial and industrial applications. At present, we have projects in several countries,

with more to come.

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Danfoss Semco is part of Danfoss Group

Danfoss A/SDanfoss A/S Danfoss Semco A/SFire Protection

Danfoss Semco A/SFire Protection

Semco Maritime A/SFire Division

Semco Maritime A/SFire DivisionDanfoss A/SDanfoss A/S

Denmark’s largestindustrial manufacturercompany

More than 250 000finished packedcomponents per day

Supplier of keycomponents for SemcoMaritime’s high-tech firefighting systems




50 years of design,engineering and deliveryof fire fighting systems

Pioneer in the use ofhigh-pressure water mistsystems

Leading supplier of low-pressure CO2




Global leader in the sales,development, productionand service/commissioning ofcertified fire fightingsystems

Total solution provider

Supplier for both themarine and land segment








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Danfoss Semco’s 4 Business Areas

WM Land 34%Hotels, hospitals, metro lines,

data centres, archivesAfter Sales 12%

Service and repair of certified fixedsystems incl. spare parts

WM Land 34%Hotels, hospitals, metro lines,

data centres, archives

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Water Mist Land Water Mist Marine Gas&Foam After Sales

Gas & Foam 34%Container, RO-RO, LNG, LPG,

Car carriers

WM Marine 20%Supply ships, FPSO, RO/PAX,

yachts

Danfoss Semco Technology

SEM-SAFE® highpressure water

mist


mist

OurTechnology

OurTechnology


mist


mist

ArgoniteArgonite

CO2CO2

High pressure CO2 and low pressure CO2 Installed as totalflooding systems by product and environmentally friendlymedia.

High pressure CO2 and low pressure CO2 Installed as totalflooding systems by product and environmentally friendlymedia.

Non toxic , non corrosive , non fogging fire fighting media50% Argon and 50% Nitrogen for easy refilling.Non toxic , non corrosive , non fogging fire fighting media50% Argon and 50% Nitrogen for easy refilling.

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OurTechnology

FoamFoam

Dry chemicalpowder

Dry chemicalpowder

Aggregate of air filled bubbles that forms a coherentfloating blanket on flammable liquids Protection ofhelicopter deck and cargo deck.

Aggregate of air filled bubbles that forms a coherentfloating blanket on flammable liquids Protection ofhelicopter deck and cargo deck.

Fire protection for ship carrying liquefied gas andchemicals/agents in bulk.Fire protection for ship carrying liquefied gas andchemicals/agents in bulk.

Water Mist

Low Pressure Water Mist High Pressure Water MistLow Pressure Water Mist High Pressure Water Mist

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For Marine applications For Marine and Industrial & Commercial applications

CO2

Low Pressure Co2 High Pressure CO2

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For Marine applications

Foam Dry Chemical PowderFoam Dry Chemical Powder

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For Marine applications

We Stand out

Total & Certified Solution Provider of Fixed Fire Fighting SystemsTotal & Certified Solution Provider of Fixed Fire Fighting SystemsTotal & Certified Solution Provider of Fixed Fire Fighting Systems

State of the Art TechnologyState of the Art Technology

Reliable & Efficient Fire Fighting SystemsReliable & Efficient Fire Fighting Systems

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Reliable & Efficient Fire Fighting SystemsReliable & Efficient Fire Fighting Systems

Extensive Project Management ExperienceExtensive Project Management Experience

The intelligent use of fireFor a fire to survive, it relies on the presence of the 3 elements of the fire triangle:Oxygen, heat and combustible material.The removal of any one of these elements will extinguish a fire.A high pressure water mist system goes further – It attacks 2 elements of the firetriangle: oxygen and heat.The uniqueness of water mist is that it combines the suppression effect of gas andtraditional sprinkler systems.As well as removing the oxygen like a gas system, it simultaneously cools the fire like atraditional sprinkler.The cooling effect additionally lowers the risk of re-ignition.HeatTo fight a fire, a traditional sprinkler system spreads water droplets over a given area,which absorbs heat to cool the room.Due to their large size and relatively small surface, the main part of the droplets will notabsorb enough energy to evaporate, and they quickly fall to the ground as water. Theresult is a limited cooling effect.By contract, high-pressure water mist consists of very small droplets, which fall moreslowly.

Combustible material

For a fire to survive, it relies on the presence of the 3 elements of the fire triangle:Oxygen, heat and combustible material.The removal of any one of these elements will extinguish a fire.A high pressure water mist system goes further – It attacks 2 elements of the firetriangle: oxygen and heat.The uniqueness of water mist is that it combines the suppression effect of gas andtraditional sprinkler systems.As well as removing the oxygen like a gas system, it simultaneously cools the fire like atraditional sprinkler.The cooling effect additionally lowers the risk of re-ignition.HeatTo fight a fire, a traditional sprinkler system spreads water droplets over a given area,which absorbs heat to cool the room.Due to their large size and relatively small surface, the main part of the droplets will notabsorb enough energy to evaporate, and they quickly fall to the ground as water. Theresult is a limited cooling effect.By contract, high-pressure water mist consists of very small droplets, which fall moreslowly.

Water mist droplets have a large surface area relative to their mass and, during their slow descent, they absorb much moreenergy.A great amount of the water will follow the saturation line and evaporate, meaning that water mist absorbs much more energyfrom the surroundings and thus the fire. That’s why high pressure water mist cools more efficiently per litre of water: up toseven times better than can be obtained with one litre of water used in a traditional sprinkler system.OxygenThe very small droplets in a high pressure water mist system quickly absorb so much energy that the droplets evaporate andtransform from water to steam, because of the high surface area relative to the small mass of water.This means that each droplet will expand more than 1700 times, when getting close to the combustible material, wherebyoxygen and combustible gases will be displaced from the fire, meaning that the combusting process will increasingly lackoxygen.

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Water mist droplets have a large surface area relative to their mass and, during their slow descent, they absorb much moreenergy.A great amount of the water will follow the saturation line and evaporate, meaning that water mist absorbs much more energyfrom the surroundings and thus the fire. That’s why high pressure water mist cools more efficiently per litre of water: up toseven times better than can be obtained with one litre of water used in a traditional sprinkler system.OxygenThe very small droplets in a high pressure water mist system quickly absorb so much energy that the droplets evaporate andtransform from water to steam, because of the high surface area relative to the small mass of water.This means that each droplet will expand more than 1700 times, when getting close to the combustible material, wherebyoxygen and combustible gases will be displaced from the fire, meaning that the combusting process will increasingly lackoxygen.

The intelligent use of fire

Temp. °C

20 vol % O2

16 vol % O2

O2 O2

Temp. °C

100

10

378 2635

Energy absorptionKJ/kg

10

378 2635

Water mist cooling effect per kg water

Traditional sprinkler cooling effect per kg water

The unique SEM-SAFE® Components

Specially Designed Water Mist Nozzles

The Result Of 20 Years of Pioneering Research & Testing:

• Nozzles: the market’s highest spacing (5.5 m).Our nozzles are 100% capacity and spray patterntested.

• The special shape gives the water strong rotarymotion in the swirl chamber and is extremelyquickly tranformed into a water mist that is jettedinto the fire at high speed.The large spray angle and the spray pattern ofDanfoss micro nozzles enable high spacing.

The Result Of 20 Years of Pioneering Research & Testing:

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• Nozzles: the market’s highest spacing (5.5 m).Our nozzles are 100% capacity and spray patterntested.

• The special shape gives the water strong rotarymotion in the swirl chamber and is extremelyquickly tranformed into a water mist that is jettedinto the fire at high speed.The large spray angle and the spray pattern ofDanfoss micro nozzles enable high spacing.

The unique SEM-SAFE® Components


The unique Danfoss simplex micro nozzles Droplets created at 100 bar of Pressure & a size

of 10-50 micron Nozzle based on a patent pending method for drilling

holes Droplets at 60 bar Pressure

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The unique Danfoss simplex micro nozzles Droplets created at 100 bar of Pressure & a size

of 10-50 micron Nozzle based on a patent pending method for drilling

holes Droplets at 60 bar Pressure

The unique SEM-SAFE® components

Unique Pump DesignUnique Pump Design

• Pumps: maintenance free the market’s mostcompact pumpThe unique design uses water as a lubricant,meaning that routine servicing and replacinglubricants are not needed.The world’s lightest pump and most compact highpressure pump Multi axial piston pump incorrosion resistant stainless steel.The pump is protected by international patents andis widely used in many different segments.The pumps offer up to 95% energy efficiency andvery low pulsation, thus reducing noise.

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• Pumps: maintenance free the market’s mostcompact pumpThe unique design uses water as a lubricant,meaning that routine servicing and replacinglubricants are not needed.The world’s lightest pump and most compact highpressure pump Multi axial piston pump incorrosion resistant stainless steel.The pump is protected by international patents andis widely used in many different segments.The pumps offer up to 95% energy efficiency andvery low pulsation, thus reducing noise.

The Unique SEM - SAFE® Components

Highly Corrosion - Proof Valves

VDHT High Pressure Valves in Stainless Steel

Highly Corrosion Proof and dirt resistant

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How SEM-SAFE® works➊ SEM-SAFE® Water Mist System with closed nozzlesOn stand-by, the system maintains a pipe pressure of approx. 12 bars.When the temperature exceeds e.g. 57 °C, the heat-sensitive glass bulbsmounted in the nozzle heads melt.At this point, the high-pressure pump is automatically activated and wateris forced through micro-nozzles at very high pressure (100 bars) to createa fine mist.Only nozzles with melted bulbs are activated.This means that only the heat-affected area will be actively sprayed.Also available for pre-action systems.

➊ SEM-SAFE® Water Mist System with closed nozzlesOn stand-by, the system maintains a pipe pressure of approx. 12 bars.When the temperature exceeds e.g. 57 °C, the heat-sensitive glass bulbsmounted in the nozzle heads melt.At this point, the high-pressure pump is automatically activated and wateris forced through micro-nozzles at very high pressure (100 bars) to createa fine mist.Only nozzles with melted bulbs are activated.This means that only the heat-affected area will be actively sprayed.Also available for pre-action systems.➋ SEM-SAFE® Water Mist System with open nozzlesOn stand-by, the system has dry piping.This system will only activate manually or when sensors have detected heat, smoke or a flame, dependingon type and application.The nozzles are dimensioned in sections and all the nozzles in the activated section will be released.➌ SEM-SAFE® Water Mist System in operationDuring operation, the high-pressure pump draws water from the buffer tank (a non -pressurised stainlesssteel tank) and forces it through a non-return valve to a high -pressure manifold.From here, it is distributed to the relevant section(s) via the section valve.A pressure relief valve controls the pump pressure and is designed to return the full pump capacity to thebuffer tank.

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➋ SEM-SAFE® Water Mist System with open nozzlesOn stand-by, the system has dry piping.This system will only activate manually or when sensors have detected heat, smoke or a flame, dependingon type and application.The nozzles are dimensioned in sections and all the nozzles in the activated section will be released.➌ SEM-SAFE® Water Mist System in operationDuring operation, the high-pressure pump draws water from the buffer tank (a non -pressurised stainlesssteel tank) and forces it through a non-return valve to a high -pressure manifold.From here, it is distributed to the relevant section(s) via the section valve.A pressure relief valve controls the pump pressure and is designed to return the full pump capacity to thebuffer tank.

How SEM-SAFE® Works

The SEM - SAFE® System is supplied with water from either a pump unit or a cylinder system

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Small pump unit Large pump unit Cylinder system Small cylinder system

Pipes & Fittings

Piping Material

High-class stainless steel

In accordance with AISI 316

Maintenance free

Piping Material

High-class stainless steel

In accordance with AISI 316

Maintenance free

Water Mist TraditionalSprinkler

NozzlePiping ø10 - 15 mm ø 25 - 50 mm

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RingPipeline ø22 - 33.4 mm Ø 65 - 100 mm

MainPipeline Ø 33.4 - 60.3 mm Ø 100 - 200 mm

Pipes & Fittings

The piping material is of high class stainlesssteel that always meets or exceeds AISI 316, anacid-resistant type with Mn contents.The pipe material is so soft that it can be bent.The small sizes can be shaped with handheldtools, thus saving a large number of fittings andalso reducing the risk for leakage.

The piping material is of high class stainlesssteel that always meets or exceeds AISI 316, anacid-resistant type with Mn contents.The pipe material is so soft that it can be bent.The small sizes can be shaped with handheldtools, thus saving a large number of fittings andalso reducing the risk for leakage.

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