SERVICE MANUAL
CYKLON 5000
Page 4
Service manual C
yklon - V
. 1.0 - 10-03-22 Appr
ov
ed by: JN
FUNCTION
POSEIDON breathing regulator is a two-stage regulator where the first stage is a diaphragm-actuated
reducing valve, whith reduces the primary pressure (Cylinder pressure) to approx. 167 PSI/11,5 BAR. The reduced
pressure (the secondar’y pressure) then goes via the regulator hose to the second stage where the air
supply is automatically regulated to the convenience of the diver.
The first-stage always holds the adjusted pressure above the ambient pressure which is necessary to the
function of the breathing regulator. This is brought about, the outer springloaded diaphragm being in
contact with the ambient pressure. It automatically responds to this pressure acting it and thereby
regulates all changes in pressure.
During diving in cold water, i.e, temperatures lower than +10°C (+50°Farenheit ), the outer spring housing
of the first stage may be provided with an anti-freeze cap in order to prevent direct contact with the
water.This is necessary as the considerable cooling that takes place when the primary air expands in the
secondary chamber can otherwise cause ice to form and thereby prevent the springs and diaphragm
from functioning.
The second-stage functions in such a way that the underpressure created in the regulator housing
during each inhalation influences a diaphragm actuated valve system, which will supply the necessary
air as long as the inhalation phase lasts. The automatic pressure compensation takes place in the same
way as in the first stage, the outer diaphragm surface being in direct contact with ambient pressure, and
the pressure on the inside of the diaphragm must correspond to ambient pressure before the diaphragm
can return to its position. The diaphragm retums to its rest position and shuts off the air flowing in as
soon as the inhalation phase has been broken off and the air pressure in the regulator housing has
become equal to ambient pressure.
The second stage fias been provided with an ejector system for the purpose of keeping inhalation effort
to a minimum.
During the exhalation phase, the exhaled air goes out through the exhalation diaphragm on the
opposite side of the inhalation diaphragm into the ambient medium. The exhalation diaphragm closes
automatically when exhalation stops. Also, the exhalation diaphragm regulates the necessary pressure
compensation by closing when the ambient pressure is equal.The special construction of the exhalation
section of the regulator has been designed to obtain high capacity with low exhalation effort.
The second stage bas a built in purge button, for manual purging.
