RECOMMENDED USAGE —SUITABLE FOR ELECTRIC FIRE
Automatic Fire suppression for Electrical panels isvital due to the high risk of potential fire. Not only it iscritical function of the electrical cabinet compromisedin a fire scenario which could spread to surrounding
equipment causing devastating fire.
If the Electrical room is already equipped with fire
suppression system, our ETD can reduce
replacement cost of suppression system when fireoccurs. If the room is not equipped with fire
suppression system, ETD is the best solution toprotect your valuable assets.

Electrical panelEnvironmental test chambers are systems that allow
users to manipulate the environmental conditions of an
enclosed space to run controlled tests on a subject.
Researchers, engineers, scientists, and manufacturers
utilize these conditions to push innovation and ensure
whatever products they produce are safe for use.
The most common concern involved during theenvironmental testing is the release of flammable gases
causing a fire. Incase this situation occurs, ETD can help
suppress the fire almost immediately and stop the spreadof fire.

1-9-5 Higashi-Gotanda, Shinagawa-ku, Tokyo, 141-0022 Japan
Tel. +81-3-3444-6261 (Special Equipment Section) Fax. +81-3-3444-2510 Email: info@nitibou.co.jp

Erase Tube Device
The easy and optimal solution for protecting people,
irreplaceable assets and minimizing downtime.

https://www.nitibou.co.jp/

Test chamber
EX 26912

TYPICAL INSTALLATION LAYOUT OF ERASE TUBE DEVICE■ Installation example

40 ｍｍ

Erase Tube Device
YouTubeAUTOMATIC EXTINGUISHER UNIT
MADE IN JAPANUL LISTEDTHE WORLD'S FIRST UL 2166P BASED CERTIFICATION

40 ｍｍ

40 ｍｍ

0.5 m

40 ｍｍ

40 ｍｍ

1m

200 ｍｍ2m40 ｍｍ

40 ｍｍ

200 ｍｍ

40 ｍｍ

3.5 m

Note: Every section of ETD tubing must maintain a min. 50 mm distance from each wall of the enclosure.
The distance between coils is 40 mm.

JQA-QM-7801

202405 1000 MG Printed in Japan.

COMPARISON OF GAS PERMEABILITY

Length

0.5 m

1m

2m

3.5 m

ETD-05UL

ETD-10UL

ETD-20UL

ETD-35UL

WeightApprox. 0.42 kg

Approx. 0.55 kg

Approx. 0.84 kg

Approx. 1.0 kg

PRODUCT OVERVIEW

FK-5-1-120.11 kg

0.21 kg

0.42 kg

0.74 kg● It is a pre-engineered total flooding extinguisher unit designed to protect enclosures lessthan 1m 3 . When the temperature in the protected enclosure rises to the critical threshold thepolymeric tube discharges the fire fighting agent into the enclosure through a raptured
nozzle hole and suppress the fire automatically.

Protected
volume/Height0.12 m 3
0.5 m (Max. H.)
0.3 m (Min. H.)

0.23 m 3
1.0 m (Max. H.)
0.5 m (Min. H.)

0.45 m 3
1.5 m (Max. H.)
0.6 m (Min. H.)

0.8 m 3
2.3 m (Max. H.)
0.8 m (Min. H.)

Part number● Erase Tube Device is a stand alone device, flexible and easy to installeven in a difficult place to access.
● No cylinder and power source required to activate the device.
It is reliable even in case of a power outage.
● It is specially suitable for the electrical panel fire that first responder
cannot access quickly.
● The tube detects fire before temperature rises to 120℃.
The tube activates at 107℃ to 115℃ at ambient temperature.
● It uses a PE-type resin for detecting fire and releasing fire
extinguishing agent quickly. A resin layer specializing in barrier
properties is provided to block the permeation and reduction in weightof fire extinguishing agent.
● The device uses a FK-5-1-12 - Its human and eco friendly fire
extinguishing agent and it also does not influence equipment due toits superior electrical insulation properties.

ERASE TUBE COMPONENTS AND FEATURES

Gas barrier layer
Adhesion layer
Inner/ Outer layer

ERASE TUBE is a 5 layered device that provides
strong gas barrier properties and optimal activation
temperature.
The tube uses PE-type resin for detecting firepromptly and releasing extinguishing agentsmoothly.
The tube detects fire before temperatures rise to120℃ due to abnormal heat generation of Electricalequipment including wires and batteries andreleases extinguishing agent quickly.

Nitrogen

OxygenCarbon dioxide

Helium

25℃

25℃

25℃

25℃

ERASE TUBE (Polythylene)

0.017

0.27

0.081

160

Polyamide 6 (Stretched)1238205

2000

Erase Tube Device

Accessory

Mounting clip

CHEMICAL RESISTANCE■ Gas resistanceMaterials

Adaptability

Materials

ApplicableLiquiefied petroleum gas

Carbon dioxide gas

ApplicableBenzine

Partially applicable

Chlorine (Dry)Partially applicable

Gasoline

Applicable

Chlorine (Wet)

Partially applicable

Kerosene

Not applicable

HydrogenApplicable

Petroleum

Partially applicable

Natural gas

Applicable

LubricantPartially applicable

NitrogenApplicable

GreasePartially applicable

OxygenApplicable

Animal oil

Applicable

Ozone

Partially applicable

Water vapor (L) at <150℃

Partially applicableSulfurous acid gas• ERASE TUBE DEVICE (ETD) is designed as independent operating unit.
It is not possible to install multiple units into one enclosure unless each unit
has enough agent quantity to extinguish the enclosure alone.
• This automatic extinguisher unit has been tested and all limitations have been pre-established based on UL 2166P.
If the specified limitations are not followed, the unit might not supply the required quantityof the extinguishing agent which might result in a fire not being extinguished.

APPLICABLE CLASSESClass AClass BClass C

Surfaces a fire in ordinary
combustible material, such as thesurface of the wood, cloth, paper,
rubber and many plastics.

A fire in flammable liquids,
combustible liquids, petroleum
greases, tars, oils oil-based paints,
solvents, lacquers, alcohols andflammable gases.

A fire that involves energizedelectrical equipment (When used for
the Class C purpose, additional fire
detection and signaling system isrequired) UL Listed Heat Detection
wire is recommended.

ApplicableNot applicable
Applicable

FK-5-1-12

Note:

Adaptability

Ammonia

Water vapor (L) at <150℃ or higher
Magnetic
mounting clip(Option)■ Oil resistance

The extinguishing agent increased with the vapor
pressure in case of abnormal heat generation andreleased by utilizing the pressure of its own without
requiring power source.
FK-5-1-12 fluid is low in acute toxicity and is a highly
efficient clean agent extinguishant, so that it
puts out fire long before the agent reachedconcentrations that could harm humans. In fact,
because its design concentration is much lower thanit's No Observable Adverse Effects Level (NOAEL).
FK-5-1-12 fluid offers the largest margin of safety
amongst all other chemical clean agents, CO 2 andinert gas mixtures.
■ Electrical insulation properties
A cellphone and a circuit board are submerge into atank of clean agent. It clearly shows that the Electricalinsulation properties of the clean agent has a superior
properties, thereby giving no influence to the electronicequipments. Its withstand voltage of 2.3 comparing to1.0 of N 2 at 1 atm.

2000

Vapor pressure (kPa)Erase Tube Device

PROTECTED VOLUME TABLE

1600
Vapor pressureof about 600 kPa
at 113°C

1200

800

400

0–50

Boiling point
at 49.2°C
Vapor pressureof 40.4 kPa
at 25°C0≈Discharge
temperature

50100

Temperature (°C)

150