RKN DiveTech s.r.o. - REBREATHERS & COMPONENTS

Rebreather ALFA has been finished!
We would like to introduce you our new rebreather ALFA. As we have advised we wanted to take an advantage of proof fundamentals and interesting components of various rebreathers and use them in the only one equipment.
So rebreather ALFA was developed.
It is established on fundamental utilization of two scrubers and on enclosed breathing lungs which are placed on back. This fundamental was taken from successful mCCR rEVO.
The supporting structure of our rebreather is made of stainless box and integrated back plate. Maximum rigidity of the whole equipment body was reached by combination of exact double folds, various material thicknesses and final welding.
We wanted to eliminate number of tubes and lines conducted around the equipment. All gas distributions are located inside of wing unit. The only central gasblok is used for connection to open circuit of BOV, inflator, and external diluent source.
This solution helped us to eliminate tubes pulled along the equipment from the first stages of regulators. We could use only connection to high-pressure manometer.
The breathing circuit is provided by default with BOV. CCR hoses are connected by self connector to inhale and exhale lungs on the top of the supporting system.
The expiratory gas goes through two individual absorbers of CO2 which are connected by hollow cover. Scruber units and covers are made of material Delrin which has congenial mechanical and thermal insulation attributes.

The whole process and monitoring of breathing mixtures inside of rebreather ALFA is controlled by proof electronics Pursuit from company Shearwater Research.
We have used solution Deep Pursuit from company Narked at 90 in our system. This solution is combination of primary control and decompression computer together with secondary electronics which secures independent monitoring ppO2 in system and its display via LED HUD.
This solution ensures to finish dive safely in case of failure of primary electronics via manual control with usage of information about actual value of ppO2 displayed on HUD.

Primary control electronics Pursuit from company Shearwater Research.
- on-line calculation of decompression
- full trimix software
- automatic calibration
- 5 CC and 5 OC defined mixtures by user
(possibility of editing during the dive)
- two "set points", both are with adjustable in extant from 0.4 to 1.4
- automatic configurable switching of set point
- possibility of switching between open and closed circuit during the dive
- automatic adaptation if light display according to ambient light
- Bulmann´s decompression algorithm with adjustable gradient
- optional calculation of decompression with "V" Planner Live
- upgrading firmware by user with infra port
- separated and individual computer, control unit, solenoid and HUD supply

Secondary electronics.
- display ppO2 with exit to LED HUD
- independent calibration
- unique system of display ppO2
- diver is able to check actual value of ppO2 by one look
- display example:
RRR____RRR____RRR = 0,7
GG_____GG_____GG = 1,2

- self-constructed compact BOV
- sealed by o-rings
- mechanics of second stage – APEKS
- HUD holder

- easily available and protected push-buttons
- placed in the bottom corners of wing unit
- manual dosing of oxygen on the right side
- manual dosing of diluent on the left side
- valves of oxygen and diluent bottles are situated by the same way

- all pneumatic distributions are placed and protected inside of wing unit
- distribution of diluent is solved by central gasblok
- from here is connection into the second stage rebreather BOV
- it is also used for inflator of wing
- clear inputs are designed for off-board of diluent connection
- off-board tube would be lead over left shoulder and would be ended by quick coupling (optional)

eCCR ALFA is compact, fully electronically controlled rebreather with on-line decompression.

- weight without bottles and sorbent: 17 kg
- total weight (ready for dive): 31 kg
- dimensions: 650 x 400 x 190 mm (high x width x depth)
- operation time: minimally 240 minutes
- bottles volume: 2 x 3 litres (200 bar)
- scruber capacity: 2,8 kg (fraction 2,5 – 5)
- electronics: Shearwater Research Deep Pursuit (full trimix software)
(primary – controller + on-line deco,
secondary – display ppO2 with output to HUD)
- rebreather BOV
- buoyancy kompensator: wing with easily adjustable harness

Time of delivery: 6 weeks after receiving an order and advanced payment – 50% of the whole amount.

eCCR RKN ALFA
Rebreather ALFA has been finished! We would like to introduce you our new rebreather ALFA. As we have advised we wanted to take an advantage of proof fundamentals and interesting components of various rebreathers and use them in the only one equipment. So rebreather ALFA was developed. It is established on fundamental utilization of two scrubers and on enclosed breathing lungs which are placed on back. This fundamental was taken from successful mCCR rEVO. The supporting structure of our rebreather is made of stainless box and integrated back plate. Maximum rigidity of the whole equipment body was reached by combination of exact double folds, various material thicknesses and final welding. We wanted to eliminate number of tubes and lines conducted around the equipment. All gas distributions are located inside of wing unit. The only central gasblok is used for connection to open circuit of BOV, inflator, and external diluent source. This solution helped us to eliminate tubes pulled along the equipment from the first stages of regulators. We could use only connection to high-pressure manometer. The breathing circuit is provided by default with BOV. CCR hoses are connected by self connector to inhale and exhale lungs on the top of the supporting system. The expiratory gas goes through two individual absorbers of CO2 which are connected by hollow cover. Scruber units and covers are made of material Delrin which has congenial mechanical and thermal insulation attributes.
The whole process and monitoring of breathing mixtures inside of rebreather ALFA is controlled by proof electronics Pursuit from company Shearwater Research. We have used solution Deep Pursuit from company Narked at 90 in our system. This solution is combination of primary control and decompression computer together with secondary electronics which secures independent monitoring ppO2 in system and its display via LED HUD. This solution ensures to finish dive safely in case of failure of primary electronics via manual control with usage of information about actual value of ppO2 displayed on HUD.
eCCR ALFA - details

Rebreather BOV	- self-constructed compact BOV - sealed by o-rings - mechanics of second stage – APEKS - HUD holder
Manual operating – bypass	- easily available and protected push-buttons - placed in the bottom corners of wing unit - manual dosing of oxygen on the right side - manual dosing of diluent on the left side - valves of oxygen and diluent bottles are situated by the same way
Central distribution of diluent	- all pneumatic distributions are placed and protected inside of wing unit - distribution of diluent is solved by central gasblok - from here is connection into the second stage rebreather BOV - it is also used for inflator of wing - clear inputs are designed for off-board of diluent connection - off-board tube would be lead over left shoulder and would be ended by quick coupling (optional)