Controlling the power of a massive air flow, 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 and 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 in ated 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 and in turn evacuate all inner volumes. The main blue bladder valve then collapses and 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. The Jetstream: traditionally popular with technical divers as well as the Swedish and US navies. An easy breathe at any depth, the second stage incorporates a safety valve that allows you to continue to breathe normally in the unlikely event of abnormally high pressure air being delivered to the second stage. Approved to EN250 cold water standard.

Your regulator is life support equipment and it should regularly undergo maintenance service to minimize the risk of failure, accidents and injury. We recommend that maintenance service should be performed about once every 100 dives or biannual, whatever comes first. Maintenance service should be performed by a service technician that is certified to service Poseidon equipment and only Poseidon original parts should be used.