Details
Poseidon Jetstream MK3 Regulator (Din)
Controlling the power of a massive airflow, astonishingly reaching some 2100 litres/minute is an engineering challenge. The solution to this was to obtain a precision regulation, keeping breathing pressure to within +/- 5 mm.w.c throughout the inhalation cycle, regardless of depth & demand. Called a servo-assisted valve, it works in the same way as does the power steering you may have on your car - it's all about compensation.
Prior to diving, when you pressurize the regulator, the main blue bladder valve is inflated with the interstage pressure, along with all inner volumes including the upstream side of the servo valve. When this is done a "swoshing" sound of streaming air is heard. The system is then activated. On inhalation, the forces from the inhalation diaphragm easily overcome the light forces to crack open or 'tilt' the servovalve & in turn evacuate all inner volumes. The main blue bladder valve then collapses & in turn lets an amount of gas out, corresponding to the actual demand.
This technology ensures that the lightest possible effort can result in an almost limitless amount of gas on inhalation.
All the more astonishing is the fact that Poseidon introduced this technology to the market as far back as 1981.
