POSEIDON Xstream Series, Xstream Oxygen, Xstream Duration, Xstream Deep, Xstream Deco User Manual
TM
XSTREAM
USER MANUAL 1.0
XSTREAM USER MANUAL
Table of Contents
Table of Contents ...............................................................................................1
Conventions Used in this Guide ........................................................................3
Poseidon XSTREAM ...........................................................................................5
Approvals/Certications .....................................................................................6
Denitions/Abbrevations ....................................................................................7
General safety regulations .................................................................................8
Product descriptions
Xstream 2:nd Stage ................................................................................................. 10
Xstream 1:st Stage ..............................................................................................11
Poseidon T.D.A ...................................................................................................12
Deep / Deep90 1:st Stage (Trimix, Air, Nitrox Ready) ...............................................12
Deco / Oxygen 1:st Stage (Oxygen, Ean, Air) .........................................................13
Duration/Duration En 144-3 1:st Stage (Ean, Air) ....................................................14
Dive90 1:St Stage (Air) ........................................................................................15
Xstream Lp Hoses ...............................................................................................15
Usage
Mounting The Hose ................................................................................................. 16
Pre Dive ................................................................................................................... 16
Diving ....................................................................................................................... 19
After Dive ................................................................................................................. 19
Accessories ............................................................................................................. 21
Diving Gas ............................................................................................................... 22
Other .................................................................................................................23
Technical data ................................................................................................... 24
Breathing Performance ....................................................................................29
Troubleshooting ................................................................................................ 31
Oxygen Statement............................................................................................32
Annual Service ..................................................................................................33
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XSTREAM USER MANUAL
Conventions Used in this Guide
This User’s Guide is NOT intended for use as a training manual, or in any way as a
substitute for proper training through a legitimate training agency approved by Poseidon
AB. It is only intended to provide basic information concerning the Poseidon Xstream.
Throughout this Guide, special alert boxes have been inserted to draw attention to
critical information. Three levels of alerts are used in conjunction with color-coded
trisymbols, as follows:
DANGER:
Alert boxes that are RED contain extremely critical information
related to the safety and well-being of the diver. Failure to comply
with information contained in these boxes could lead to serious
injury or death.
WARNING:
Alert boxes that are YELLOW contain vital information that may
impact a diver’s safety and/or proper function of the Poseidon
Xstream. Though generally not life-threatening, information
contained in these boxes should not be ignored.
IMPORTANT:
Alert boxes that are BLUE contain important information about the
proper care and maintenance of the Poseidon Xstream, and that
may increase diver comfort or enhance enjoyment during dives.
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XSTREAM USER MANUAL
No part of this book may be reproduced or transmitted in any form or by any
means, electronic or mechanical, including photocopying, recording or by any
information storage retrieval system, without permission in writing from an
authorized representative of Poseidon Diving Systems AB.
Text, photographs and gures copyright © 2019
by Poseidon Diving Systems AB
ALL RIGHTS RESERVED
Manual Version 1.0 - February 2019
DANGER:
Do not attempt to use the Poseidon Xstream without proper
trainig or without a thorough and complete working knowledge of
the material contained in this manual. Careless can cause serious
injury or death. It is the user’s responsibility to attentively monitor
the Poseidon Xstream and to have a working knowledge of the
procedures if a problem should arise.
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XSTREAM USER MANUAL
Poseidon XSTREAM
Welcome, to the world of Poseidon divers. Here at POSEIDON we are very
pleased that you have chosen one of the world’s foremost diving regulators.
POSEIDON has been developing regulators for divers since 1958. Professional
divers, military divers, and techdivers choose POSEIDON equipment because of
the high demands they place on our products - the same demands you have!
Your new regulator has been designed to provide you with a life time of pleasure as a
POSEIDON diver. Our objective is that the equipment you use should not be noticeable,
instead it should be at one with the experience and give you total freedom to achieve
what every diver dreams about, the ultimate dive. To be at one with the water. To have
full control and at the same time feel the weightlessness when, meter by meter you
descent into a world of your own.
Nothing shall disturb your concentration. No wheels or knobs that need adjusting. No
regulators that resist your breathing when you have reached your target depth. No
suits that limit your freedom of movement or get damaged at the slightest encounter.
This vision has accompanied Poseidon since the legendary diving enthusiast and
engineer, Ingvar Elfström started the company in the late 50’s. The same ideas motivate
us now.
The name Poseidon represents constant development and improvement of diving
equipment where everything is positioned correctly and everything functions, even in
the most extreme situations.
Products developed in cold Scandinavian waters that are among the toughest you can
dive in. If they work here, they will work anywhere. Poseidon’s devoted followers are
convincing proof of that. Thank you for your condence.
Yours faithfully
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XSTREAM USER MANUAL
Approvals/Certications
The Xstream regulator series is approved according to the EU Directive for
Personal Protective Equipment, 89/686/EEC and meets or exceeds the applicable
(see Technical Data for full detail) requirements of :
EN 250:2014 for cold water diving
NORSOK U-101 for diving in excess of 50m depth (excluding requirements for
CO2 content and temperature of inspired gas)
EN 738-1 for oxygen pressure shocks Type approvement certicate no 020341,
020342 and 020343 is issued by:
SGS United Kingdom Ltd.,
Ellesmere Port,
CH65 3EN, United Kingdom.
Notied body number 0120.
Production quality assessment according to article 11 B of 89/686/EEC is
assessed by:
SGS United Kingdom Ltd.,
Ellesmere Port,
CH65 3EN, United Kingdom.
Independent performance testing according to directive and standards is
conducted at accredited laboratories Diving and Naval Medicine Centre, Swedish
Armed Forces, and Det Norske Veritas, Norway.
Poseidon Diving Systems AB is certied according to ISO 9001
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XSTREAM USER MANUAL
Denitions/Abbrevations
Oxygen: any gas mixture containing greater than 21% oxygen up to 99.95%
oxygen.
Trimix: a gaseous mix containing Oxygen, Nitrogen and Helium.
EAN 40: any gas mixture containing greater than 21% oxygen up to 40%.
Enriched Air Nitrox.
IP: Interstage pressure; the pressure existing between the 1st stage and the 2nd
stage valve.
HP: High pressure; the pressure inside the SCUBA cylinders, normally ranging
between 300 bar (4351 psi) to 10 bar (145 psi)
Scfm: standard cubic feet per minute.
l/min STPD: standard temperature and pressure dry gas.
T.D.A: Thermo Dynamic Anti-Freeze.
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XSTREAM USER MANUAL
General safety regulations
Although the regulator is functional with pure oxygen and has excellent breathing
characteristics down to 200m (656 ft), the usage is restricted by human
limitations, or, by limitations set out by the dive training organisation, whichever
is lower.
Poseidon only warrants the regulator performance as specied herein, and
cannot be held responsible for improper preparations, incorrect gas mixing and
planning, or diving beyond individual medical, psychological and physical
limitations.
Limitations of use:
Xstream Deco, Oxygen and Duration models no higher oxygen content than
99,95% by volume.
Xstream Deep models manufactured after 2015 are Nitrox Ready with a maximum
oxygen content of EAN 40, and a maximum Helium content of 94% Xstream Dive
and octopus only for use with air and a maximum depth of 50 meters.
Maximum depth never more than 200 meters (656 ft), but normally limited by
medical effects of the gas.
The oxygen partial pressure must normally not exceed 1.4 bar (20.3 psi), under
the foreseeable maximum diving depth. Only if established oxygen exposure
tables are strictly adhered to, and a responsible organisation is planning dives with
increased exposures, elevated levels can be accepted for a shorter period of time.
The oxygen partial pressure must never be lower than 0.2 bar (2.9 psi), under the
foreseeable minimum diving depth.
The nitrogen partial pressure must not exceed 3.2 bar (46.4 psi), under the
foreseeable maximum diving depth. Inhaling cold gas and exhaling warmed gas,
represents energy losses of the human body (thermal imbalance, hypothermia).
This effect increases with increasing depth and can result in a sudden
unconsciousness. Diving to extreme depths this effect must be considered,
calculated and planned for and preventive actions must be taken, such as proper
thermal protection and pre-heated gas.
Xstream is for unlimited use in water temperatures from water freezing
temperature tice +1°C to +50°C (122°F). The freezing temperature depends on
salt content. Diving with gas blends other than air, or deeper than 18 m (59 ft), or
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XSTREAM USER MANUAL
in overhead environment, requires special training regarding practices,
equipment, physical and medical understanding.
This manual assumes the reader has some basic knowledge in those respects.
Diving is a strenuous physical activity. Its difculty may be increased by
conditions such as cold water, poor visibility, hard work, and increased depth.
Always try to exercise prudent judgement when determining whether or not to
dive. Never dive when tired or in poor health.
Diving deeper than 50m (164 ft) using gasses other than air is more demanding
on the equipment. Most equipment on the market is only approved for use within
EN 250 limits. Although Xstream Deep is certied to 200m (656 ft) depth and
Xstream Deco, Duration and Oxygen is for use with pure oxygen, you must
always make sure all of your equipment is suitable.
Do not use gas mixtures containing Helium for dry suit ination. Helium has very
low insulating proerties, and contributes to a more rapid cooling of the body.
Preferably Argon shall be used, but must never be inhaled. Insulating or actively
heating of the body surface has very little effect on the hypothermia described
above.
WARNING:
Xstream Oxygen, Xstream Deco and Xstream Duration must be
used exclusively with EAN ltered Nitrox or Oxygen and should be
kept O2 clean at all times. If an Xstream Oxygen, Deco or Duration
regulator is contaminated or used with a contaminated ll then the
regulator must be O2 cleaned by a certied Poseidon technician.
Xstream Deep manufactured after 2015 is Nitrox ready from factory
and when serviced, an O2 compatible lubricant should be used. If a
silicone based lubricant is used, then it’s no longer to be regarded
as Nitrox Ready.
WARNING:
The Xstream regulators are not designed to be breathed up on
by more then one person at a time. If you congure your Xstream
regulator for more then one diver to breath from it at a time, the
cold water performance may not meet minimum safety standards.
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XSTREAM USER MANUAL
Product descriptions
The Xstream regulator models have been developed based on experience gained
from deep-, cave-, wreck- and cold water diving.
The different types of diving all share some common requirements on safety
through functionality, simplicity and performance.
XSTREAM 2:ND STAGE
A number of features greatly improve
safety and ease of use:
If debris has degraded the function of the
exhalation checkvalve, it can easily be
reached and corrected by just twisting off
the diffuser. It is the only part which needs
to be disassembled, and if it gets lost
during the operation, the regulator will
continue to function but must only be
used for immediate ascent.
Integrated surgical hose xing points
safely secures the regulator to the diver,
but in an emergency allows a distressed
buddy to retrieve the regulator without
undue stress to the diver.
The dead air space is low at just 49.5 ml (3
in3) making CO2 gures (hypercapnia)
minimal. Inhalation resistance is incredibly
low and unaffected by depth and breathing
pattern Because of the unique Poseidon
valve technology, there is no need for
external adjustments.
Xstream is tted with the new ergonomic
mouthpiece Poseidon AIR, with asymmetrical
lugs for the most comfortable bite.
All diaphragms are protected so that a
strong current or using a scooter or tug
does not affect either inhalation or
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XSTREAM USER MANUAL
exhalation. A minimal number of moving
parts, coupled with thermodynamic
engineering, ensures the safe use in an
extremely cold environment.
XSTREAM 1:ST STAGE
In case of a malfunction in the 1st stage
causing excessive intermediate pressure,
the safety valve integrated in the 1st stage
will bleed off the excessive gas. This
system both indicates to you that
something is wrong so that you can take
action, and because of the up-stream
servo-valve technique, allows the
regulator to continue to breath normally.
(conventional downstream regulators are
likely to free-ow in such a situation).
The rst stage is a balanced rolling
diaphragm ball valve producing extreme
leak tightness. Conventional designs are
sensitive to wear, misalignment, and
manufacturing precision. A ball always
nds its correct place.
Combined with the 2nd stage, the
enormous capacity of the 1st stage make
the regulator meet the EN 250 breathing
performance requirements even at as low
as 16 bar (232 psi) cylinder pressure. This
means that you gain an extra 34 bar (493
psi) of gas compared to most other regulators!
The Xstream construction requires less
o-rings than any other regulator. Except
for sealing the blind screws (3-4), there is
just 1 sealing o-ring (semi-static) in the
bottommounted versions and 2 in the side
mounted.
The hose routing is developed to be
optimised for a redundant system, using
two regulators. The HP ports are
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XSTREAM USER MANUAL
positioned to accommodate the use of
gas monitoring computers Patented e.g.
rst stage mounted HP sender/receive
units.
POSEIDON T.D.A
Xstream has a built-in Poseidon T.D.A,
ThermoDynamic Anti-freeze, which requires
no maintenance. It is always there, doing
the job. It is thermodynamically protecting
the parts which must not freeze.
It is identied by the large slots in the
cover, allowing the heat energy of the
water to reach the spring. The cold from
the inside is consequently insulated from
the spring, via an insulation barrier and
insulating diaphragm. It is constructed
without compromise to any detail to
prevent cold reaching the sensitive area.
Using Poseidon T.D.A, a regulator can
free-ow air in fresh water of 0ºC (32ºF)
for at least 10 minutes and afterwards still
be completely unaffected.
DEEP/DEEP90 1:ST STAGE
(TRIMIX, AIR, NITROX READY)
All materials in Xstream Deep are chosen
and tested to be optimised for Helium and
high ow. This requires special attention
to leak tightness, since Helium gas has
such a low density. All o-rings are of the
highest EPDM quality, and rated for use
down to -40ºC (-40ºF) Deep 1st stage
comes in two different versions. One side
mounted and one bottom mounted. Both
versions are certied to 200m (656 ft)
depth, and colour-coded black which in
most countries represents a bottom gas
mix.
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XSTREAM USER MANUAL
The bottom mounted Deep was
discontinued in 2005.
On regulators that have a 6 digit serial
number (i.e. 401234) the rst digit
represents the last number in the
manufacturing year. This regulator was
manufactured in 2004.
On regulators that have a 7 digit serial
number (i.e. 1401234), the rst two
numbers represents the last two numbers
in the manufacturing year. This regulator
was manufactured in 2014.
We changed from 6 digit serial numbers
to 7 digit serial numbers in 2010.
WARNING:
Deep must never be used with an oxygen content > 40%, or a
helium content > 94%.
DECO / OXYGEN 1:ST STAGE
(OXYGEN, EAN, AIR)
O4 stands for oxygen engineered, oxygen
compatible, oxygen clean and oxygen
approved. Xstream Deco, Duration and
Oxygene is O4. It is not just a viton
congured air regulator, but in detail
engineered for pure oxygen. The Xstream
Deco was made as a bottom mounted
DIN Connection 1st stage. The connection
stem is sealed with a pure copper washer
sintered onto the lter.
Production of the Xstream Deco was
discontinued in 2005.
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XSTREAM USER MANUAL
It has been tested for 360 bar (5221 psi)
adiabatic compression oxygen shocks of
less than 20 ms (heated to 60°C/140°F)
according to EN 738-1. To make the test
even more severe than required, it is
tested with 99.95% purity of oxygen.
Directly from the box, it is cleaned to
NASA Specication [1] Cleaning test
Level 100 (particle contamination) and
NVR levels less than ASTM G63 Level C,
<50 mg/m2 (hydrocarbons).
The Xstream Oxygen 1st stage is only
used on the Mk VI and SE7EN Rebreathers.
DURATION/DURATION EN 144-3
1:ST STAGE (EAN, AIR)
Xstream Duration shares the performance
and specications from Deco and
Oxygene, but is identied by GREEN
colour, and approved for use with gas
mixes up to 99,95% oxygen.
The green colour coded Duration is
offered for your safety at the dive site and
during the dive, avoiding the risk of mixing
up regulators for different gasses.
The side mounted Duration model is
available in EN 144-3 conguration.
The bottom mounted Duration was
discontinued in 2005.
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XSTREAM USER MANUAL
DIVE90 1:ST STAGE (AIR)
Dive shares the performance and
specications from the other Xstream 90
models. It is identied by the chrome
plated T.D.A. top and the number of
outlets: 5 low pressure and 2 highpressure.
Xstream Dive is delivered with a 70 cm
hose, but all hoses available for the
Xstream regulator also ts the Xstream
regulator.
The Dive90 was discontinued 2005 and
replaced with Deep90.
XSTREAM LP HOSES
All Xstream hoses are made of high quality
SBR/NR, and are available in different
lengths. For deep dives or in particularly
cold conditions a long hose 2.15m (7 ft)
has the benet of warming the gas by as
much as 12°C (22°F) under certain conditions.
The hose is available in the
following lengths as standard
2.15m (7ft.)
1.50m (4.9 ft)
0.90m (3 ft)
0.70m (2.3 ft)
Using a long hose requires some basic
knowledge in its use and routing, to take
the full advantages.
Poseidon does not recommend the use of
hose protectors on Poseidon IP hoses.
Hose protectors have been shown to
mislead the user to neglect the necessary
pre-dive hose inspection. Therefore,
Poseidon hoses are tted with wear
preventing end crimps, which in addition
can be inspected for the full engagement
of the hose to the insert at any time
through the inspection hole. On Xstream
specic hoses (article no 0130-NNN) the
hose end at the 2nd stage includes the
safety valve. As a visible indication of a
fault, the excessive gas will bleed to the
ambient environment.
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XSTREAM USER MANUAL
General safety regulations
MOUNTING THE HOSE
First time mounting the hose of the length
you have chosen, start with unscrewing
the blind-screw (5mm allen-key) where
you want the 2nd stage. Be careful not to
contamine either the open port or the
hose end. Screw the hose in place using a
13mm box spanner. Continue with
attaching the 2nd stage. Just screw the
nut over the 2nd stage housing, and
secure it rmly by hand.
OXYGEN ALERT!
If you have an Oxygen, Deco or Duration model, be absolutely
sure not to touch the o-ring or other inner connection areas with
your ngers, since grease from your ngers are a combustible
contamination.
PRE DIVE
The procedure described below only
describes the manner in which the
regulator is assembled, and does not
replace all of the various procedures you
have learned in your diving training program.
Xstream must always be used with
minimum the following SCUBA equipment:
• Compressed gas cylinder(s)
conforming to national regulations.
• Frame or holding device for the
cylinder(s) with the possibility to
mount the harness.
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XSTREAM USER MANUAL
• A safety system, including at least
one of the following:
- A submersible pressure
- A reserve valve
- An active low pressure warning device
1. Always check the gas-content of the
cylinder before attaching the regulator.
2. Before attaching the regulator,
carefully open the cylinder valve,
using gas ow to clear the outlet,
then close the valve. Never direct the
gasstream to bare skin or clothes
(porous materials).
3. Remove the protective cap on the
rst stage. Check that the O-ring on
the regulator’s connection is intact
and clean, then mount the regulator
on the cylinder valve. Turn the
handwheel/ yoke-knob until you feel
that the regulator is securely
fastened.
OXYGEN ALERT!
Inspect the o-ring, and make sure it is absolutely free from
particles and/or grease. Do not touch the o-ring.
Grease and particles can cause a re.
4. Slowly open the cylinder valve all the
way, then turn the knob back half turn.
When the 2nd stage is pressurised and
the servo mechanism engages a
maximum of 3 litres of gas vents from
the 2nd stage.
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XSTREAM USER MANUAL
OXYGEN ALERT!
Slow opening of the cylinder valve is the best way to protect the
system from compression shocks. Rapid openings represents the
highest risk for re due to compression shock. To ensure a slow
opening it is good practice to use both hands, one on top of the other.
Always open the cylinder, and
isolator valves if used, rst fully and
then a 1⁄2 turn back.
Partly opened valves increases the
pressure drop over the valve and can
reduce the performance. On some
brands, valves that are almost closed
can even shut off during a dive due
to internal exing of materials.
5. Press a few times on the purge
button on the second stage so as to
blow out possible debris.
6. Check the pressure gauge to see that
the tank is full, whilst purging, by
watching the almost zero deection
of the needle this indicates that the
air is owing correctly with no
restrictions.
7. Test breathe through the regulator
and the octopus. If the gas smells or
tastes bad do not dive with it.
Tip! You can test the regulator’s correct setting by partly immersing the 2nd
stage in water, see picture. The servo valve should crack open when the
regulator is immersed in between the two positions shown.
Tip! At dives where the water conditions are very cold or there is an apparent
risk for hypothermia, i.e. at Trimix dives or water temperatures < 10ºC (50ºF), it
is recommended to use the surgical cord around the neck for the regulator
being used. The mouth region can become numb from cold and you risk
loosing the regulator.
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XSTREAM USER MANUAL
DIVING
What is most distinctive about the
Xstream is that it is easy to use – there
aren’t any valves or switches to change
the ow of gas, reducing breathing
performance, etc. You can leave the
function and performance of the regulator
in our hands and concentrate on what you
want to do - dive.
OXYGEN ALERT!
If on any occasion the gas tastes bad, especially the taste of chlorine,
always immediately switch to another safe gas source. Bad taste can
be a sign of an internal combustion, and lethal gasses can be present.
WARNING:
If on any occasion the safety valve starts bleeding, there is a
1st stage failure. Due to the construction, you can still breathe
normally from the regulator. To avoid excessive use of gas, if
possible switch to another gas source.
Ascend, never dive with a malfunctioning unit.
AFTER DIVE
The regulator should always be rinsed
while it is still mounted on the tank.The
regulator should be under pressure, i.e.
mounted onto the cylinder, otherwise
water can enter either the rst or the
second stage and cause the build up of
ice during your next dive!
1. The regulator should be rinsed in
fresh water after every dive so as to
avoid salt crystal formation around
the functional parts.
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XSTREAM USER MANUAL
2. After rinsing, close the cylinder valve
and purge the regulator.
3. Unscrew the regulator from the tank.
Check that the protective cap is free
from water and debris, then mount
the protective cap onto the
connection.
The regulator should not be stored in
direct sunlight and/or at high temperatures.
Make sure it is never subjected to
mechanical shocks or impacts.
OXYGEN ALERT!
Never unscrew a pressurised regulator from the tank.
This can create a jet of gas over the o-ring and cause a re.
WARNING:
Never use the 1st stage housing to unscrew the regulator from the
tank. This can fully or partly unscrew the connection stem from the
housing, and create a future hazard. Always use the handwheel.
OXYGEN ALERT!
Do not smoke in an area where oxygen is present. Never lubricate
the regulator and keep hands and tools clean and absolutely free
from grease.
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XSTREAM USER MANUAL
ACCESSORIES
OXYGEN ALERT!
All accessories which may be ”wetted” by gas containing >21% oxygen
must be approved and maintained for oxygen use.
WARNING:
Notice that EN 250 marked equipment must only be used with
air according to EN 12021. Violation can cause a re and/or the
equipment may not function properly.
WARNING:
The use of accessories which have not been recommended, can
seriously impair the function of your equipment.
Pressure-gauge hoses without a restriction in the connection can,
if the hose is punctured, allow a powerful jet of gas to escape.
Xstream can be combined with the following equipment/accessories, given that
the manufacturers’ instructions foruse are strictly adhered to:
- Xstream EN 144-3 rebuild kit
- Xstream hoses
- Xstream (neck strap) surgical cord
- Poseidon Jetstream 2nd stage and hose, EN 250
- Poseidon Jetstream 1st stage, EN 250
- All CE marked or EN 250 designated cylinder valves
- Yoke clamp
- All CE marked approved pressure-gauge hoses rated for WP 300 bar using
UNF 7/16” connection.
- All CE marked pressure gauges, diving computers, and HP transmitters/
senders rated for WP 300 bar (4351 psi)
- All CE marked IP-hoses for BCD’s and dry-suits. Xstream feeds 7.5-9.5 bar
(109-138 psi) to BCD or dry-suit.
- All CE and EN 250 marked mouthpieces.
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XSTREAM USER MANUAL
DIVING GAS
WARNING:
Water in the tank is the most common reason for regulator
freeze-ups. Inspect your tanks regularly and ll gas only from
sources guaranteed to be free from moisture.
WARNING:
Gas mixing requires special training and knowledge.
Poseidon can not be held responsible for an incorrect gas mix.
Always follow established calculation methods and mixing
procedures for mixing a breathable gas. These are not described
herein.
WARNING:
Xstream Deco, Xstream Oxygen and Xstream Duration must not
be used with air complying with EN12021 as this may contaminate
the apparatus.
Approved gas mixes for Xstream Deep:
Maximum level of:
Oxygen 21% by volume
Helium 77% by volume
CO1 5 ppm
CO2 500 ppm
Water dew point -35ºC (-31°F)
Lubricants (droplets/mist) 0.5 mg / m3
Water 25 mg / m3
If air is used it shall be according to EN 12021.
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XSTREAM USER MANUAL
Other
• A regulator is primarialy constructed of brass and recyclable plastic, both of
which can be recycled.
• Do not use cleaning chemicals of any kind to clean the regulator. Neither
may silicone or any other lubricant be poured or sprayed into the regulator.
• Interstage pressure (IP) and safety valve opening pressure is preset by
Poseidon and readjustment is prohibited. Readjustment of IP will never
boost performance.
• The use of accessories which have not been recommended can seriously
impair the function of your equipment.
• Pressure-gauge hoses without a restriction in the connection can, if the hose
is punctured, allow a powerful jet of air to escape.
• Self-made and/or by Poseidon unauthorized changes/modications to the
product may lead to reduced functionality and failure, resulting in personal
injury or death. Poseidon are NOT responsible for equipment where
modications beyond product specications have been made and any/all
warranty claims will be turned down.
• Poseidon is NOT responsible for any parts/components manufactured by
any party/company other then Poseidon, mounted on Poseidon equipment.
WARNING:
The use of accessories which have not been recommended, can
seriously impair the function of your equipment.
Pressure-gauge hoses without a restriction in the connection can,
if the hose is punctured, allow a powerful jet of gas to escape.
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XSTREAM USER MANUAL
Technical data
Approved gas mixes for Xstream Deco/Duration/Duration90/Oxygen:
Maximum level of:
Oxygen 99.95% by volume
CO 2 ppm
CO2 500 ppm
Water dew point -45ºC (-50°F)
Lubricants (droplets/mist) 0.5mg/ m3
Water 25 mg/ m3
Gaseous hydrocarbons 15 ppm
Condensed hydrocarbons 0.1 mg/m3
Solid particles 2 microns
Approved gas mixes for Dive:
Maximum level of:
Oxygen 21% by volume
CO 15 ppm
CO2 500 ppm
Water dew point -35ºC (-31°F)
Lubricants (droplets/mist) 0.5 mg / m3
Water 25 mg / m3
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XSTREAM USER MANUAL
Maximum Operational depth Certied to 200 m (656 ft)
Typical Work of Breathing
1.5 J/l (see diagrams below)
50m on air, 62.5 l/min
Typical Work of breathing
1.7 J/l (see diagrams below)
200m on Trimix, 62.5 l/min
Approved gas Dive
manufactured before 2015 Air
Deep
manufactured after 2016 Nitrox
Deep
(EAN 40 max)
Duration Air / EAN 50 /
Oxygen
Deco Air / Oxygen
Maximum working pressure 300 bar (4351 psi)
Cold water performance Exceeding EN 250 requirements for
cold water use
Approvals Type Approved acc. to EU Directive
Personal Protective Equipment 89/686/EEC
Applicable Performance
Standards
EN 738-1, clause 6.6, 6.6.2
NORSOK U-101 clause 5.2-5.5, 5.9
EN 250:2000
Cleaned to hydrocarbon levels
< 50mg/ m2 & particle level X
Dive No
Deep No
Duration Yes
Deco / Oxygen Yes
O-ring materials Dive Nitrile, EPDM
Deep Nitrile, EPDM
Duration Viton, EPDM
Deco / Oxygen Viton, EPDM
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XSTREAM USER MANUAL
Lubricants Poseidon 1; BAM appr. 270 bar @ 100°C
Poseidon 2; BAM appr. 140 bar @ 100°C
Poseidon R; silicone oil.
Colour Dive Grey / Yellow
Deep / Deep90 Black
Duration Green
Deco / Oxygen White
Warranty 24 months
2nd stage
Flow Rate >2150 l/min STPD (>76 scfm)
Inner Volume 49.5 ml (3 in3)
Weight I52 g (5.4 oz)
Technique Upstream servo-valve
Safety valve opening pres. 18 +/- 1 bar (261 +/- 14 psi)
Swivelling Around axis, can be used either side
Material ASA, Brass, TPU, Silicone, PU
Venturi assist Automatic
Inhalation control Automatic
Surgical cord Silicone
Dismontable w/o tools Yes
Anatomic Mouthpiece ”Poseidon AIR”
1st stage
Flowrate (l/min) >4000 l/min (>141 scfm)
Nominal inter-stage pres. 8.5 bar (123 psi)
Anti-Freeze protection Built in T.D.A
Technique Rolling diaphragm
Valve technique Ball valve
Seat material Zytel
Test pressure 450 bar (6526 psi)
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XSTREAM USER MANUAL
Ports
** Latest versions
Connection
* Only Duration90 manuf.
in 2004 or later.
Material Brass, plastics, stainless steel
Hose
Standard lengths hose 0.7 m (2.3 ft), 0.9 m (3 ft), 1.6 m (5.2 ft),
Dive 5 IP (UNF
3/8”) / 2 HP
(UNF 7/16”)
Deep
Duration
Deco
Deep 90
Dur. 90
Oxygen
Deep
Dive / Dive90
Duration/Duration90/
Duration EN 144-3
Deco
2.15 m (7 ft)
3 IP (UNF
3/8”) / 1 HP
(UNF 7/16”)
5 IP (UNF 3/8”)
/ 2 HP (UNF
7/16”)**
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XSTREAM USER MANUAL
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XSTREAM USER MANUAL
Breathing Performance
The diagram above show a calculated
graph for Work of Breathing in Joules/litre
at Qaverage=62.5 litres/min.The equation
behind it, is extracted from hundreds of
tests, from which coefcients for gas
dependency, average ow dependency,
and depth dependency is calculated.
Its maximum inaccuracy is within +/10%. The equation assumes the most
dense gas possible to safely breath is
used, i.e. a maximum tolerable pO2, pN2
at any depth. Adding more Helium will
lower the gures. It is important to
understand that this equation does not
apply to any other regulator, since the
coefcients and characteristics are
strongly dependent on the regulator
construction.
Full regulator capacity is obtained as long
as the cylinder pressure is twice the
absolute interstage pressure, given the
cylinder valve pressure drop is within EN
250 limits. Taking into account the normal
variations in interstage pressure and
adding a safety margin, the required
minimum cylinder pressure during diving is:
50 bar cylinder pressure from 0 msw to
100 msw.
70 bar cylinder pressure from 101 msw to
200 msw
It is a good practise to always plan your
dive according to the “1/3-rule”, planning
to use 2/3 of the cylinder capacity.
29
XSTREAM USER MANUAL
Troubleshooting
Effect Examine Reason Action
Safety valve is opening Is it sponta-
neously opening
Immersed in water, small
bubbles are coming from
the mouthpiece
The regulator free ows
breaking the surface
Do they stop
after the regulator is rinsed
Check the
cracking
pressure
(see section 6.2)
The bubbles
remain, cracking
pressure is correct
Check the
cracking
pressure (see
section 6.2)
If yes, it may be
a 1st stage error
If yes, the valve
was probably
jammed with
salt crystals
If the cracking
pressure is too
low, the valve is
slightly opened
The servo valve
is severely
jammed by salt
crystals
If the cracking
pressure is to low,
it i n c r e a s e s
the risk for
free-ow
If the regulator
hits the surface
at a certain attitude, it can start
a free-ow
Terminate dive
and have the
regulator serviced
Make sure
always to rinse
the regulator
after every dive,
using fresh water
Have the regulator correctly
set by an
authorised
dealer
Have the regulator cleaned by
an authorised
dealer
Have the regulator correctly
set by an
authorised
dealer
Either immerse
slowly, keep regulator in your
mouth, or hold
your hand over
the free mouthpiece while
entering the
water
30
XSTREAM USER MANUAL
Leakages at extremely
cold conditions
There is a sound from
the regulator
Gas vents from 2nd
stage on opening the
cylinder valve
The sound is
occurring even
while diving
Does it
stop within 1-2
seconds?
Incorrect orings Have the regu-
lator serviced
by an authorised dealer,
require o-ring
replacement
Incorrect lubricants have been
used
If yes, it is normal that max.
3 litres of air is used to engage
the servo-mechanism
If no, the cracking pressure is too
low, which increases the risk for
free-ow
Have the regulator correctly
lubricated by an
authorised dealer
31
XSTREAM USER MANUAL
Oxygen Statement
In diving operations, the use of oxygen is essential for the human metabolism.
In addition, oxygen concentration levels greater than in air, can improve safety,
especially but not only, by lowering the risk for DCS and Nitrogen narcosis.
The Poseidon Xstream Deco/Oxygen is approved for use with gaseous oxygen up to
99.95 % purity at maximum 300 bar supply pressure and a maximum gas temperature
of 60˚C. The Poseidon Xstream Duration90/Duration/Duration EN 144-3 is also
approved for use with gaseous oxygen up to 99,95 % purity at maximum 300 bar
supply pressure and a maximum gas temperature of 60˚C.
Using gaseous mixtures containing oxygen at high pressure always presents a certain
level of risk for equipment failure due to combustion. Greater concentration oxygen,
greater pressure, greater temperature, respectively represents factors that contributes
to increase the mentioned risk. Therefore, Poseidon has taken every precaution using
“state of the art” technology, expertise, industrial standards, and knowledge to lower
the risk as far as possible. Both Xstream Deco / Oxygen and Xstream Duration are
engineered for oxygen use, assembled and cleaned in a clean room environment,
made up by materials chosen to expose lowest possible risk x failure-effect product,
and are tested and approved for oxygen use.
It is strictly prohibited to use the Poseidon Xstream Oxygen/ Deco/Duration/Duration90
with oxygen (ref. “denitions”) without being fully trained and certied in the use of
oxygen by a recognised training agency. Failure to have such training and certication
could lead to death or serious personal injury.
It is likewise absolutely essential that the end user strictly follows the mandatory
guidelines given in the users manual for the Xstream models. Regular maintenance,
servicing and cleaning is a prerequisite for keeping the risk as low as possible. Servicing
and cleaning must be carried out by an authorised oxygen service dealer. Poseidon
has developed and veried a servicing and cleaning method, which guarantee
acceptable levels of contaminations. Poseidon can not be held responsible for the
effects of other un-veried cleaning and servicing methods.
Failure to adhere to these mandatory requirements transfers the responsibility to the
owner.
Poseidon will continue to develop products and components which further readuses
the risks involved with oxygen use. Releasing such products and components is not
an admittance that previously released items must be recalled. It is in everyone’s
interest to always strive for lowering risks.
32
XSTREAM USER MANUAL
Annual Service
It is extremely important for your safety that you keep your equipment in good
condition. You need not carry out any other maintenance than described in previous
section. The regulator should be serviced annually and this must only be carried out at
one of POSEIDON´s authorised service locations.
Because of the robustness and simplicity of the Xstream construction, the amount of
servicing is kept to a minimum. Service should be done at regular intervals to ensure
that the regulator maintains its functionallity. It is recommended that you service your
Xstream regulator at least once every 24 months as a minimum but preferbly once
every 12 months or as often as it is estimated to be necessary.
You can do some fault correcting servicing and/or preventive servicing
yourself. Following the instructions which comes with the spare-part,
you are allowed to:
Replace the diffuser.
Replace the mouthpiece.
Replace the hose.
Modications of the product are prohibited.
Modications can impair the function of the regulator, and transfers the
responsibility to the person who does the modication. Adding decals and
other outer means for oxygen/ Nitrox identication, as well as marking with
a pen is not regarded as modications.
WARNING:
Do not lubricate the regulator beyond that done by Poseidon
or your authorised Poseidon dealer. Spraying lubricants into the
2nd stage can cause deterioration of materials or be a trap for
dust particles.
33
Poseidon Diving Systems AB
Åkeredsvägen 1, SE-421 63 Västra Frölunda, Sweden
Phone: +46 31 734 29 00
E-mail: info@poseidon.com
www.poseidon.com
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