Electronically controlled precision gas blending equipment
Our electronically controlled gas blending equipment works according to the partial pressure process and renews highly precise gas blends of helium, oxygen and nitrogen with freely selectable mixing ratios. Standard gases: helium, oxygen, nitrogen, air.
- He: 0-100%, resolution 0.5%, typ. deviation +/- 0.25%
- O2: 0-100%, resolution 0.25%, typ. deviation +/- 0.15% (@ 3.5% abs.)
- N2: 0-100%, resolution 0.5%, typ. deviation +/- 0.25%
Special gases like Hydreliox, etc. on request.
The oxygen sensor technology developed from our research project 2HE-HPCCR highly exceeds conventional galvanic sensors in terms of precision and stability. A oxygen booster and a low pressure air compressor are integrated within the system. They are connected to the high pressure breathing gas compressors and the gas storage systems.
Gas storage systems
The on-board gas storage systems are divided into three groups – basic gas stock (He, N2, O2, Ar), pressure chamber storage and diving gas storage. Mainly standard aluminum diving cylinders of the sizes 40 cuft, 80 cuft, 7 ltr and 12 ltr are used as storage tanks. The advantages of this storage configuration are high variability, free positioning on the ship (trimming) and the reduction of refilling processes due to the direct usage of the storage tanks as back – or decompression tanks.
Two, individually operated, water cooled high-pressure breathing gas compressors are used. They feature a saturation-controlled scrubber and molecular sieve-filtering system, a performance of 520 liters per minute and a maximum pressure of 350 bars. The quality of the CO-, and CO2– levels, vapor and oil aerosols is constantly monitored and ensures Tec-Air-Standards* to 100%. Due to the electrical powering of the compressors and energy supply via the traction batteries, no CO, CO2, NOx emission of takes place during the filling process. This guarantees that only the purest, completely dry sea air enters the compressors and further the scuba tanks. The sea water cooling enables a smooth operation, even at high outdoor temperature levels and ensures a low warming and therefore a high degree of filling of the storage tanks.
Workshop with service station
Service – and repair work on breathing regulator and other PSA are a matter of trust. Most service-providers still lack an “oxygen-clean” work station, where regulators, tanks and other equipment, which is exposed to a higher partial oxygen pressure level, can be maintained or repaired. Our on-board safety-workplace is equipped with all necessary service- and special tools to guarantee a professional breathing regulator revision. It furthermore includes an autoclave for disinfection and an ultrasound cleanser for physically removing deposits through a combination of a washing and drying process with multi-step circulated rinsing and a steam blaster for complete, residue-free removal of lubricants and depositions. The way in which all parts are assembles (glove box), ensures that the newly cleaned parts are not contaminated with (non-oxygen compatible) lubricants anew. The reviewing and setting of the breathing regulators is performed at an electronic work station and protocoled. During the process, high- and medium pressure, the response characteristic and breathing work are checked and protocoled.
Glove box for breathing regulator service
*The compliance with the limits of the air quality standards DIN EN 12021 concerning the appropriate purity of the breathing gases is not given by far in technical diving. This is due to the increased partial pressure of the gases on question, which increases their physiological effectiveness. For example, the EN 12021 states a limit of 15 ml/m³ of CO. This is quite valid for dives up to 50 m, but not for greater depths. We have therefore set a limit of 2 ml/m³ for breathing gas blends for up to 200 m.