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EuramcoSafety

Ventilation SolutionsAirline

In a service letter to MRO organizations, Boeing recognized the flammability and explosion risks associated with working near airplane fuel tanks. As a solution, they recommend

continuously ventilating with explosion-proof equipment.

Euramco Safety has a line of ventilators that are ideal for fuel tank ventilation. RAMFAN® explosion-proof equipment is collectively and individually certified explosion proof. All the components along the electrical path in a RAMFAN explosion-proof ventilator are designed, constructed and certified to work safely in potentially explosive atmospheres. Once assembled the ventilators are individually ATEX-certified safe for use in zones 1 and 2.

Ventilation TechniquesIt is mandatory to have a blower forcing fresh air into the the tank. It is also recommended to have exhaust equipment

at a secondary location downstream to pull air out and supplement the airflow through the tank.

Properly monitor air in the fuel tanks. Atmospheric conditions should be checked and continuously monitored.

Ventilating Airline FuelTanks with Explosion-Proof Fans

HAZARDS OF AIRPLANE FUEL FUEL-TANK ENTRY

● Fire and explosion

● Toxic and irritating chemicals

● Asphyxia

● Physical, the confined nature of the tanks themselves

CONDITIONS REQUIRED FOR ENTERING A FUEL TANK

● Communication

● Respiratory protection

● Ventilation and air monitoring

● All electrically powered equipment must be certified explosion-proof

The best method to control unwanted hazards while working in an open fuel tank is proper ventilation. It is mandatory

to ventilate tanks to keep the fuel vapor concentration below the lower explosive limit (LEL). Inside the fuel tank is a

confined space that can create significant levels of flammable or toxic vapor with a relatively small amount of chemi-

cal. The more fresh air that is present in the fuel tank, the safer the environment.

Explosion-Proof Fans

UB20xx

HAZARDOUS RADIUS OF FUEL TANKS

During the purging process, only explosion-proof equipment can be used within the flammability zones, which extend

to a 50-foot radius around the airplane. The areas around an airplane are defined as Class 1, Division 1 or Division 2

flammability zones. Use ventilation to achieve fire safe conditions. Purging the fuel tanks of aircrafts is needed anytime

a wing assembly is planned to be opened or their is

maintenance to be done in the fuel tanks. Ventilating in

a potentially explosive atmosphere requires intrinsically

safe venturis or certified explosion-proof electric fans to

safely ventilate the environment.

Since there are fumes in the air being removed from

the wing, it is possible that this atmosphere could move

through the flammable or explosive vapor range of the

fuel/air mixture. It is important that nothing be in the

exhaust stream that can stimulate ignition. Venturis

accomplish this requirement by using compressed air

to create a vacuum, but this is very inefficient method

of ventilating.

The process of purging a fuel tank often requires 24

hours of ventilation, which also requires a compressed

air system operating 24/7. This is a significant drain of

energy since venturis are approximately 10% efficient.

Alternatively, using an electric fan that is certified for safe use in

hazardous locations to provide the evacuation air flow is more

energy efficient. Electric fans will move significantly more air

with much less input energy that a compressed air venturi

system.

In a recent energy assessment report prepared

by an independent auditors for Gulfstream it was

estimated that switching from a venturi method

of fuel tank purging to an explosion-proof electric

fans would save 75,672 kWh a year, resulting in a

cost savings of $6,544.

Fire Safe Conditions

● The areas around airplane fuel tanks are considered flammable

until all the fuel in an airplane is removed and the tanks are fully

purged.

● Purging is considered complete when measured lower explosive

limit (LEL) is confirmed to be 10% or less.

● Maintenance personnel must check the LEL inside the fuel tanks

and around the airplane at floor level periodically.

● Any Maintenance pits or tunnels must also be checked for

flammable vapors.

Equipment Restrictions During Maintenance Activities with Closed Fuel Cells

● In the hangar - all potential ignition sources from maintenance

activities and associated tooling must be outside of the Class I,

Division 2 hazardous locations, unless the tooling is approved for

use in a hazardous location.

● On the ramp - maintenance personnel must be aware that fuel

vapors can escape from airplane surge tanks, especially

on a hot day and during fueling. Maintenance personnel should use

explosion proof tooling under the surge tank vent scoop or near

the fueling panel.

After fire safe conditions are met, Boeing recommends that the tanks continue to be ventilated while the fuel tanks are open.

Electric Fans vs PneumaticVenturis for Purging Fuel Tanks


EFi Series

LegendHazardous Locations

UB20xx 8" (20 cm) Blower/ExhausterPowerful, Compact Size and Lightweight

Dual Voltage, Dual Frequency

EFi75xx 12" (30 cm) Blower/Exhauster

Rugged and ReliableEFi50xx/EFi120xx/EFi150xx 16" (40 cm) Blower/Exhauster

Order# Description HpShip Wt. (Ibs/kg)

Free Air (cfm) (m³/hr)

EF7002* 8" (20 cm) W Blower/Exhauster115V, 50/60Hz

1/3 25/11980/1,666

@60Hz

EF8002* 8" (20 cm) Blower/Exhauster230V, 50/60Hz

1/4 25/11819/1,392

@50Hz

*Whole unit certification see below.

EB7201XX* 12" (30 cm) Blower/ Exhauster 115V, 50/60Hz

3/4 58/262500/4250

@60Hz

EB7201XX-230* 12" (30 cm) Blower/ Exhauster 230V, 50/60Hz

3/4 58/262500/4250

@60Hz



*Whole unit certification see below.

LR66789

EFi50XX

TURBO BLOWERS

*Whole Unit certification see below. **Motor Certfication No. UL E312535, CSA LR66789EA8120XX Motor NO. 1223007401EG8200XX/EG8200-230 Motor NO. 1133007417

EA8000XX** (EFi50xx)

16" (40 cm) Blower/ Exhauster 115V, 50/60Hz

0.5 51/233200/5440

@60Hz

EA8120XX* (EFi120xx)


1.2 58/263750/6375

@50Hz

EG8200XX* (EFi150xx)


1.5 62/284459/7580

@60Hz

EG8200XX-230* (EFi150xx)


1.5 62/284459/7580

@60Hz




Certification String II 2 G Ex de IIB T6 GbAT

EX

ST

RIN

G

At busy airports there isn’t much turn around

time to spare. Don’t let brake cooling delay

departures and limit your profitability.

Boeing discovered coolings fans reduced the park

time necessitated by brake heat, and estimates that a

787-8 with 275 passengers can be turned around and

prepped in as little as 45 minutes!

Fans help ensure even heat dissipation better than

natural cooling, especially in adverse environments.

Furthermore, higher elevations and temperatures can

reduce the effectiveness of internal or natural cooling.

Airplane Brake Cooling Fans

Time is Money, Make the Most of Yours

Fans can be rolled by hand or placed on equipment card to transport to airplane.

#1 factor of airflow performance is impeller designWe engineer impellers to perfectly match the power curve of the motors installed on the fan, achieving targeted airflow at

specific power input and motor RPM. We manufacture the most efficiently powerful fan impellers in the industry by creating

impellers specific to the the motor it's built with. For our electric fans, we even build the motors – giving us full control to

meet our performance targets.

RAMFAN blowers equipped with PowerStream can be setback up to 5x further than other brands. Grounds crew can

keep a safe distance from the toxic and carcinogenic compounds blown off the brakes.

POWERSTREAM EXCLUSIVELY ON RAMFAN® X-SERIES BLOWERS

TRUST IN RAMFAN®

Turbo Blowers with Powerstream®

VX700 28" (70 cm) Large Structure Ventilators

Order# Description Engine Weight

(GK5005 w/ trailer) 28" (70 cm) Blower/Exhauster

Honda GX630 23 Hp/17 kW

920 lbs60,200 cfm

(105, 400 m3/hr)

Airflow

GX500 24" (60 cm) Large Structure Ventilators


GD5005 24" (60cm) Blower/Exhauster

Honda GX270 8.5 Hp/6.3 kW

137 lbs 37, 700 cfm (64,090 m3/hr)

Airflow

GX350 18" (46 cm) High Performance Gas Blowers


GH5005 18" (46 cm) Blower/Exhauster

Honda GX200 5.5 Hp/4.1 kW

84 lbs 18,705 cfm (31, 799 m3/hr)

Airflow

GX200 16" (40 cm) Powerful, Compact Size and Lightweight


GG5010 16" (40 cm) Blower/Exhauster

Honda GXH50 2.1 Hp/1.6 kW

48 lbs12,820 cfm

(21, 794 m3/hr)

Airflow

3 IGNITION PROTECTION CATEGORIES

Ignition Protection Categories I.D. Can Be Used In Safety Principle

Increased safety Ex e Zone 1 No arcs, sparks or hot surfacesNon-sparking equipment Ex nA Zone 2

Pressurized encapsulation Ex d Zone 1 Controls an internal explosion and extinguishes the flame

Junc

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6 CONDITIONS & SUBDIVISIONS

FlammableMaterials

Temporary Behaviorof Explosive Atmosphere

Classificationof HazardousAreas

Group as Defined in Directive 94/9/EC

Equipment Category as Defined in Directive 94/9/EC

EquipmentGroup as Defined in EN 60079-O

Equipment Protection Level (EPL) as Defined in EN 60079-O

Gases/ Vapors

is present continuously orfor long periods or frequently

Zone 0 II 1G II Ga

arises in normaloperation occasionally

Zone 1 II 2G or 1G II Gb or Ga

is not likely to arise in normal operation, or if it does, will persist for a short time only

Zone 2 II 3G or2G or 1G

II Gc orGb or Ga

5 TEMPERATURE CLASSESClass T1 T2 T3 T4 T5 T6

MAXIMUM SURFACE TEMPERATURE

450ºC 300ºC 200ºC 135ºC 100ºC 85ºCIIA Acetone

Ammoniac Benzene Acetic Acid Ethane Ethyl Acetate Ethyl Chloride Methane Methanol Naphthalene Phenol Propane

i-Amylacetate n-Butane n-Butyl Alcohol

Gasolines Diesel Fuels Heating Oils n-Hexane

Acetyl-dehyde

– –

IIB Town gas (lighting gas)

Ethylene Ethylene Oxide

Hydrogen Sulfide

Ethylether – –

Gas Group IIB, Class t6 includes all specifications for Gas Group IIA, Class T1-T6 and Gas Group IIB, T1-T6

Highlighted areas in chart apply to Euramco Safety’s ATEX certification

© 2

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CERTIFICATIONSIECEx UL Certificate #: 13.0062XEC-Type Examination Certificate #: DEMKO 09 ATEX 0926969XINMETRO Certificate #: UL-BR 13.0593XCE Hazardous Location Marking: CE0539Ingress Protection: IP55

Highlighted areas in charts apply to Euramco Safety’s ATEX Certification String

I

Ex de T6

S II 2 G Ex de IIB T6 GbIgnition Protection

Category

Gas GroupIIB

TemperatureClass

Conditions &Subdivisions

Gb

Equipment Group IIEquipment Category 2

Hazard G

ATEXTR NG

1

12

3

46

5

Gas Group IIB includes all gases for Group IIA

4 GAS GROUPS

Gas Group Representative Test Gas IIA PropaneIIB Ethylene

EQUIPMENT GROUP & CATEGORY

Equipment Equipment Protection HazardGroup Category Level Gas Dust UseII - Industrial 1 Very high G – Zones 0, 1, 2(non-Mining) protection – D Zones 20, 21, 22

2 High G – Zones 1, 2protection

1 CLASSIFICATION OF HAZARDOUS AREAS

Area Classification Gases Dusts Zone Criteria (based on frequency and duration)Zone 0 – Potentially Explosive substance present

– Zone 20 continuously or for long periods >1000hrs/yrZone 1 – Potentially Explosive substance likely to be

– Zone 21 present in normal operation >10hrs <1000hrs/yrZone 2 – Potentially Explosive substance unlikely to be

– Zone 22 present in normal operation, if it does will onlybe for short periods <10hrs/yr

2

Zone 1

USA / Luxembourg / China / [email protected]

Toll Free (800) 472-6372USA +1 (619) 670-9590 Luxembourg +352-26008055 07

1116

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