Dräger TR75 semiclosed-rebreather

Escape Mixgas rebreather from 75 m

Dhe TR75 also called escape rebreather is a semi-closed device for escaping from depth. The gas flow and composition of the gas is set to allow the user to stay at 75 mter for 4.5 minutes, e.g. to swim out of a hatch. Due to the semi-closed technique, the diver inhales a lower fraction than the oxygen fraction supplied. Partly due to the short staying times at depth, this is possible, according to the manufacturer. However, this oxygen loading applies to emergency situations and can never be applied in recreational activities. Besides the escape function, the rebreather can also be used to serve in toxic environments or as a life jacket at the surface. The system comes with distinctive means so that drowning persons can be quickly recognised. For example, an electric light is placed on the reflective cap for recognition at night.

DATASHEET SEMICLOSED REBREATHER
Dräger TR 75	Date: 19 December 2004 Update: 2022
	Database semi closed rebreathers by: J.W. Bech
Manufacturer	Dräger
Model	TR 75
Land of origin	Germany
Design year	1978
Special Note:	Successor TR 66
User group	Fire/Mil
Part no:	T 12450
Working principle	Metering valve 5l/min	EAN40
Gas type	Nitrox
Intended use	Respirator, Surfacing device	Life Jacket
Dimensions L x W x H	400 x 400 x 200 mm
Device weight	12,5 kg
Buoyancy in water	Approx 170 N
Usage time	70 min
Max depth	75 mtrs	( pO2= 3,4 bar)(zero-time 4,5 min!)
Used material for housing/backplate	Vacuform plastic
Pressure reducer	Lever-type Z mechanism
Connection reducer – bottles	W21.8 x 1/14”
Supply pressure	200 bar, minimum 16 bar
Metering	5 l/min ± 0.2 l/min
Manual bypass	Min. 60 l/min
Pressure gauge	0 – 300 bar	Triangle @ 200 bar
Cylinders	2 x 1 litre
Cylinder material	Steel CrMb
Cylinder charging pressure	200 bar
Cylinder thread	W 21.8 x 1/14”
Valve	Lefthanded / righthanded
Designed for gas mix	40% O2 60%N2 ± 1% O2
Co2 absorption cartridge capacity	1 litre soda lime
Co2 absorption cartridge rechargeable	No
Co2 absorption cartridge storage	Sealed at factory 2 years
Co2 absorption cartridge storage	Installed in device 6 month
Connections Co2 cartridge	Dia. 41/M48 x 2 O-ring seals
Breathing bag material	Sturdy cotton fabric	Rubber on one site
Volume	17 litres
Relief valve	Setting I 25 mbar	Setting II 80 mbar
Mouthpiece	Valve type
Operating temperature
Magnetic signature
Colour	Bottles Blue Lung Orange
Worn	On the chest
FFM attached	no
Special test device for metering tests	T75 Tester	T12492
Dimensions test device	240x190x180mm
Weight test device	4,7 kg
Pressure gauge	80 mm
Calibration	Red mark @ 5 l/min
Use only for mix gas	40/60 O2/N2
Extra info:
Additional information:
Email address owner:
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
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