Siebe Proto Ten

 

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DATASHEET OXYGEN REBREATHER

Siebe Gorman Proto Ten

Date: 24 June 2003

 

JW. Bech

Manufacturer

Siebe Gorman & Co. Ltd.

1968

Model

Proto ten

 

Land of origin

U.K

 

Special Note: 

Firefighting/minerescue

Built in cooler

User group

civil

 

Part no:

 

 

Working principle

demand

 

Gas type

oxygen

 

Cylinder volume

2 ltrs

 

Max. cylinder pressure

200 bar

 

Material of cylinder

steel

 

Counterlung inspire

?

 

Counterlung exhale

 

 

Operational time

3 hrs

 

Operating temperature

 

 

Magnetic signature

-

 

Weight ready to use in Air

 

 

Weight ready to use in water

 

 

MOD

 

 

Scrubber material

Protosorb

 

Colour

 

 

Price

 

 

Worn

On the back

 

Mouthpiece

Side mounted hoses

 

Backpack

yes

 

Extra

 

 

Extra

 

 

 

 

 

 

 

 

If you have any information to add this sheet please mail it to jw.bech@quicknet.nl References to source and names will always be added!  

 

Info found:

 

Origin: http://www.therebreathersite.nl

 

Info: http://www.cdc.gov/niosh/mining/pubs/pdfs/ri9650.pdf

 

 
SIEBE GORMAN PROTO TEN

 
The Proto Ten (figures 26-27) is a compressed-O2, closedcircuit
apparatus with a refillable CO2-absorbent canister. It
was certified by the USBM in 1968 as a 3-hr apparatus. The
cylinder contains 400 L ATPD of O2 when filled to 2,840 psi at
room temperature. A constant O2 flow of 1.5 L/min ATPD is
provided and augmented by a pressure-activated demand valve.
The relief valve is also pressure-activated. The CO2 absorbent
is Protosorb, a soda lime composed mostly of CaOH.
Exhaled air from the face mask passes through the exhalation
hose and check valve through the radial CO2-absorbent canister
housed in a metal shell, which also contains an inverse
breathing bag, a heat-absorbent canister, and a warning whistle.
The breathing circuit air is contained within the metal shell and
contacts the exterior of the breathing bag, the interior of which
is open to ambient. Air is inhaled from the shell interior,
through a metal tube connected to the heat-absorbent canister,
through the inhalation check valve and hose, and back to the
face mask.
The inverse breathing bag design results in the breathing
circuit air contacting the metal shell, enabling heat to be
radiated to air in a plenum vented to ambient. A chamois cloth
jacket covers the exterior of the metal shell. The jacket is
wetted from water coming from the ice melting in the heatabsorbent
canister, which is wicked through a hole in the
canister to two positions on each side of the surface of the shell.
The water in the chamois jacket evaporating to ambient cools
the surface of the metal shell. Heat is transferred to ambient
also through the breathing bag, which pulls ambient air into it
with each breath. A sponge at the bottom of the inside of the
metal shell, under the CO2-absorbent canister, holds the water
released by the chemical reaction.

 

 

 

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