Mischgas-Swimmtauchgerät FGT 1/D
The FGT 1/D is possibly one of the most important semi-closed diving systems produced for military purposes. The system equipped with 2 cylinders allows a selector button to choose from Nato B,C or D mix gases. FGT or FertigGas Tauchgerät came in a fully non-magnetic composition and was therefore ideally suited for the detection and destrucite of sea mines.
| DATASHEET SEMICLOSED REBREATHER | |||||
| Dräger FGT I also FGG I | Date: 9 Januari 2005 | ||||
| Fertig – Gas – Tauchgerät I (refered to by Dräger as Mischgas-Schwimmtauchgerät or Mixed-Gas-Swim-Diving-Apparatus) | Database semi closed rebreathers by: J.W. Bech | ||||
| Manufacturer | Dräger | ||||
| Model | FGT 1 | Version A and D | |||
| Land of origin | Germany | In use; D, Nl, Es, Gr, S | |||
| Design year | 1968 | ||||
| Special Note: | Mine Clearance/Military | Successor of Nemba in NL | |||
| User group | Military | ||||
| Magnetic characteristics | Conform Stanag 1097, 1131 | ||||
| Part no: | T12200 and T12400 | FGT1/A – FGT 1/D | |||
| Difference between A and D version | A version: Magnetic version | D version: non magnetic | |||
| Working principle | Constant Mass Flow | By restriction (CMF) | |||
| Gas type | Nitrox standard Nato mix | ||||
| Gasmix Nato type | % Oxygen | % Nitrogen | Flow | Workingtime | Depth |
| B | 60 | 40 | 6 | 150 | 24 m |
| C | 40 | 60 | 8 | 110 | 24-42m |
| D | 32,5 | 67,5 | 13 | 70 | 42-54 m |
| Intended use | Mine disposal | All parts designed in non-magnetic materials | |||
| Dimensions LxWxH | 650 x 460 x 215 mm | ||||
| Device weight | 25 kg | ||||
| Buoyancy in water | Neutral | ||||
| Usage time | 70/110/150 min | B,C,D mix | |||
| Max depth | 54 mtrs | ||||
| Used material for housing/backplate | Reinforced glass fibre | ||||
| Pressure reducer | Membrane type | ||||
| Connection reducer – bottles | W21,8 x 1/14” | ||||
| Supply pressure | 200 bar, minimum 50 bar | 0-50 gauge luminous paint | |||
| Metering | 6/8/13 l/min | ||||
| Manual bypass | Yes | ||||
| Pressure gauge | 0 – 200 bar | ||||
| Cylinders | 2 x 2,5 litre | ||||
| Cylinder material | Aluminium | ||||
| Cylinder charging pressure | 200 bar | ||||
| Cylinder thread | G 5/8” | ||||
| Valve | Drägertype | ||||
| Designed for gasmix | B,C,D Nato Standard | ||||
| Co2 absorption cartridge capacity | 3,5 Kg Sodasorb | Drägersorb 650 | |||
| Co2 absorption cartridge rechargeable | Yes | ||||
| Co2 absorption cartridge storage | |||||
| Co2 absorption cartridge storage | |||||
| Connections Co2 cartridge | |||||
| Absorption time | 3 hours | ||||
| Grade | 4-8 mesh Tyler | 2,4 – 5 mm | |||
| Breathing bag material | Sturdy cotton fabric | Rubber on one site | |||
| Volume | Inhale 2,5 ltr Exhale 3 ltr | Total CL volume 5,5 ltr | |||
| Relief valve | Range 4 – 28 cm WK | 10.78 – 27,45 mbar adjustable. | |||
| Mouthpiece | Valve type | ||||
| Operating temperature | |||||
| Magnetic signature | Stanag 1097 / 1131 | ||||
| Colour | Black / Yellow | ||||
| Worn | On the back | ||||
| FFM attached | Yes | ||||
| Extra info: | Red/Green Ring hoses | ||||
| Additional information: | |||||
| Email address owner: | |||||
Therebreathersite was founded by Jan Willem Bech in 1999. After a diving career of many years, he decided to start technical diving in 1999. He immediately noticed that at that time there was almost no website that contained the history of closed breathing systems. The start for the website led to a huge collection that offered about 1,300 pages of information until 2019. In 2019, a fresh start was made with the website now freely available online for everyone. Therebreathersite is a source of information for divers, researchers, technicians and students. I hope you enjoy browsing the content!