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4. REGULATOR SYSTEM

Aregulatorsystemisrequiredtoreducethepressureofthecompressedaircontainedin

thecylindertoanambientpressureinordertosupplybreathableairwhenneeded.Itisalso

possible to connect pressure gauges (analog or digital), IP inators to supply buoyancy

compensators,drysuitsandotherdevicestothissystem.Theregulatorsystemiscomposed

of a pressure reduction device and one or more breathing devices. In this manual, the

pressure-reducingdevice and the breathing device will be indicated, respectively, by the

terms“rststage”and“secondstage.”

4.1 First stage

Apressure-reducingmechanismthatreducesthepressureofthecompressedaircontained

inthecylindertoanintermediaterelativepressureofabout9.5bars(138psi).Therststage

usesastandardpiston,balancedpistonordiaphragmmechanism.

4.2 Secondstage

Thisunitissuppliedbytheintermediatepressureaircomingfromtherststagethroughthe

lowpressurehose.Itfurtherreducesairpressuretobalancewiththeambientpressure.The

secondstagemaybebalancedorunbalancedandequippedwithaVenturieffectcontrol

(V.I.V.A.)and/orwithaninhalationresistancecontrol.

4.3 Auxiliaryemergencysecondstage(octopus)withintegrated

BCinator:AIR2

Alsothisunitisfedbytheintermediatepressureaircomingfromtherststageviaalow

pressurehose.Theiarpressureisfurtherreducedtoreachthebreathingpressure.

Theauxiliaryemergencysecondstageisusedbythediverwhenthemainsecondstagehas

problemsorwhenthebuddydiverisexperiencingproblemsduringthedive.

ThisauxiliaryemergencysecondstagecanbereplacedbyAIR2.Thisunitincludesfeatures

ofbothatraditionalBCinatorandanauxiliaryemergencybreathingdevice.Thereforeit

canbeusedforinating/deatingtheBCortooperateasanauxiliaryemergencybreathing

deviceforthemselvessotogivethemainsecondstagetothebuddyexperiencingproblems.

TheAIR2issimpletouseandsafe,eveninunusualsituations.Thediverwillnotwastetime

tondtheemergencysecondstagesincetheAIR2willalwaysbethere,wherethelefthand

isusedtolookfortheBCinator.

The AIR2 it is also a BC ination and deation device, therefore it has a specic quick

connectiontothelowpressurehosewhichallowsfastconnectionanddisconnectioneven

whenthesystemisalreadypressurized.Thesystemautomaticallystopstheairowfromthe

hoseonceit’sdisconnectedfromtheAIR2usingthequickcoupling(g3-C).

Uwatec AIR2 User Manual

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