Photos Ural 1

 
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All photos thanks to Lutz!
The URAL-1  is an back worn rebreather. The webbings are maiden from brown imitation leather. The case is a shell construction, maiden of aluminium. 
The respiration tubes are connected to the openings at the upper corners, direct to the scrubber.
Here's is the SCBA open.
The mask is a modification of GP-5, a regular gasmask. The valves are  maiden of rubber and a plastic frame. They have a big diameter for a comfortable breathing. The valves are compatible to the KIP-8.
Not only a spit trap. The black rubber button together with the small valve is for empty the spit trap in use. Sure, 120 minutes is a long time. The rubber plug is for keep the loop closed in storage. 
The openings, when the SCBA is in use, are on the backside. Should be a way to protect the SCBA again fire heat.
The ID-label with the serial number. I guess 1966 is the building date. 
The scrubber has volume of round 2000 ml. The exhale of the user goes through the scrubber, into the lung
The counterlung is maiden in brown  rubber and has a volume of 6 liters. The counterlung has only 2 openings. One to the scrubber and one to the regulator.
The aluminium plate on upside is part of the over pressure mechanism. The plate is fixate by a rubber belt. The diameter of the belt is a little bit smaller then the diameter of the counterlung
So when the counterlung is nearly full inflated, the aluminum plate press on the valve on let the pressure out. The mechanism open at 5 cmH²O.
At the downside, the counterlung has a opening. I guess, it is for cleaning the lung.
Here the oxygen part. The parts are in a really good quality. 
The oxygen tank is difficult to estimate. It is a steel tank in a special size. It must be a volume near 2 liters. The valve is chromed, like medical valves. The tank fits for the regular russian oxygen thread. 
The regulator is also chromed. Basically, the regulator has a constant flow of 1 liter per minute. The egg-beater is the auto-add valve. When the lung collapse, the egg-beater pressed together and the lever mechanism open the oxygen flush
The small lever on the right side is the reserve lever, when the oxygen is near to finish.
The lever at the right downside is the manual oxygen flush. 

The oxygen gauge. It has a pressure range from 0 to 300 bar. On the glass, not easy to see, is an older calibration stamp. 
 
This page is made by Lutz original site is to be found at: http://www.rebreather-online.de/gallery_11/Rebreather%20Online.htm
Published with permission! Thanks Lutz

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