Ocean Reef NEPTUNE SPACE User manual

NEPTUNE SPACE FULL FACE MASK
OWNER’S MANUAL

NEPTUNE SPACE Owner’s Manual rel. 9.3
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For nearly 70 years, OCEAN REEF has been involved in the underwater diving industry.
We have contributed much to this industry, from fins and snorkels to the most modern
systems of underwater communication. Through the spirit of intrepid pioneers, brilliant
inventors, passionate divers, and dynamic entrepreneurs, OCEAN REEF has been able to
turn dreams into reality in the underwater world.
OCEAN REEF USA OCEAN REEF ITALY
In order to limit our paper consumption, and as a part of our environmental friendly and
responsible approach, OCEAN REEF prefers to put user documentation online rather than
print them out.
Please refer to our web site:
www.oceanreefgroup.com
© OCEAN REEF 2018

NEPTUNE SPACE Owner’s Manual rel. 9.3
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NEPTUNE SPACE OWNER’S MANUAL
TABLE OF CONTENTS
WARNING, CAUTION, NOTES 4
INTRODUCTION 5
GENERAL PRECAUTIONS AND WARNINGS 5
WHAT’S THE CORRECT SIZE 7
USE OF CONVENTIONAL REGULATOR 8
1ST STAGE SL 35TX 8
AIR CIRCULATION 9
EQUALIZATION 9
QUICK STEPS 10
PURGING 12
SERIAL NUMBER 12
MAINTENACE AND CLEANING/STORAGE 13
COMMUNICATION 14
TROUBLESHOOTING 15
Schematic and parts list (Neptune Space) 16
Schematic and parts list (SL 35TX) 18
Warranty 20

NEPTUNE SPACE Owner’s Manual rel. 9.3
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The DPIs (Individual Protective Device) scrutinized in these operating instructions have
undergone every possible test for design validation by:
Germanisher Lloyd
Vorsetzen 35
20459 Hamburg—Germany
Notified Body n.: 0098
Full face Mask Neptune Space and SL35TX
comply with CE Certification in accordance with 89/689/EEC directives under the UNI
EN250:2000 standard rules for underwater activities , including cold water use.
PREMISE
The DPIs in question are a separate part of the self-contained underwater breathing
apparatus, commonly known as SCUBA.
They comply to European regulation EN-250:2000. They can be stored at a temperature
of between 32° and 140° F. It is necessary that this equipment only be used by fully
trained, certified divers.
Operating restrictions: The DPIs in question cannot be used with diving products
without the CE mark and the air supply must meet the requirements of EN 12021.
Incorrect use, non-original spare parts and insufficient or poor maintenance, besides
being dangerous to the health and life of the user, releases MESTEL Safety of any
responsibility and nullifies the warranty.
The series of DPIs described in the following manual are the following:
NEPTUNE SPACE with 1st stage SL 35TX: full face mask with integrated 2nd stage
regulator and SL 35 TX 1st stage.
WARNINGS, CAUTIONS, NOTES
Pay special attention to information provided in warnings, cautions, and notes, that is
accompanied by these symbols:
A WARNING indicates a procedure or situation that, if not avoided, could
result in serious injury or death to the user.
A CAUTION indicates any situation or technique that could cause damage to
the product, and could subsequently result in injury to the user.
A NOTE is used to emphasize important points, tips, and reminders.

NEPTUNE SPACE Owner’s Manual rel. 9.3
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NEPTUNE SPACE
INTRODUCTION
The Neptune SPACE mask was developed through
experience gained from producing products for military
personnel protection. All designs and materials were tested
to obtain superior performance and increased safety.
The high quality of the product does not allow
the user to ignore the problems connected
with the correct use of the product and the
rules for safe diving.
The SPACE mask is Nitrox compatible up to 40% of oxigen.
(NOT valid in the European Countries)
GENERAL PRECAUTIONS AND WARNINGS
Before using this mask, you must have successfully received training and
certification in the technique of SCUBA diving from a recognized certification agency
(or any U.S. Military or government operated diving school). Use of this equipment
by a person who is not certified by a recognized agency shall render all warranties,
express or implied, null and void.
Use of SCUBA equipment by uncertified or untrained persons is dangerous and
can result in serious injury or death.
This mask is not configured for commercial use with surface supplied air.
Always pressurize the Neptune Space RAPTOR gradually by opening the
cylinder valve SLOWLY.
NEVER lubricate any part of the Neptune Space or cylinder valve with any
lubricant. Lubrication must only be performed by an OCEAN REEF trained
technician.
DO NOT apply any type of aerosol spray on the Neptune Space. Doing so may
cause permanent damage to certain plastic components, including the second
stage housing.
DO NOT leave a cylinder standing unsecured with the Neptune Space
attached to the valve. Doing so may cause permanent damage to the Neptune
Space and cylinder valve if the cylinder falls over against the first stage.
Factory prescribed service for this product must be performed at least once
annually by a factory trained OCEAN REEF Service Technician who is
employed by an Authorized OCEAN REEF Dealer. Repair, service, disassembly,
or first stage adjustment must not be attempted by persons who are not
factory trained and authorized by OCEAN REEF.

NEPTUNE SPACE Owner’s Manual rel. 9.3
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Neptune Space is not CE certified to be used with NITROX!
The Neptune SPACE might be used with NITROX gasses up to 40% O2. It is
always recommended to use cleaned air from specified cleaned air
source. SL35TX 1st stage can’t be used with NITROX. Always use NITROX
compatible 1st stages when NITROX is required.
Note: not valid in the European Union.
When diving in cold water (below 450 F, or 70 C), you must have received
training and certification in the techniques of cold water diving from a
recognized training agency.
Before connecting the regulator to the tank, check the following:
•Check that the O-ring on the tank is in place on the valve and is in
perfect working condition (INT WITH Yoke nipple CGA 850 version
only). If it is damaged or missing, it should be replaced.
•Verify that the instrumentation and accessories have been installed
correctly.

NEPTUNE SPACE Owner’s Manual rel. 9.3
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WHAT’S THE CORRECT MASK SIZE?
The Neptune Space is available in two sizes, Small/Medium and Medium/Large.
In order to determine whether a diver should wear a S/M or M/L mask, OCEAN REEF has
designed a Mask Measuring Kit. The sizing and measuring system were designed in
accordance with the official measuring procedure used in the Los Alamos Scientific
Laboratory Charts at the SBCCOM Mask Fit Facility-Aberdeen Proving Ground (Maryland,
USA).
Before purchasing a mask, the customer may use the calliper to take two simple face
measurements. Using the Full Face Mask Size Recommendation Chart, he or she can
evaluate the size category into which the measurements fall. There are three different
size categories on the chart: Small/Medium, Both, & Medium/Large. If the
measurements fall within the both category, then the diver should technically be able to
wear either full face mask (M/L or S/M), and in that case should try on a mask to select
the best fit. Please note that the chart boundaries fade. The fading areas represent less
common face measurements. It is very likely that a mask will still fit comfortably even if
measurements are located in these fading areas.

NEPTUNE SPACE Owner’s Manual rel. 9.3
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USE OF CONVENTIONAL REGULATORS
A special adapter allows the connection of several kinds
of regulators. The adaptor is available in two sizes,
medium (standard) and small. This adapter fits in place
of the surface air valve (code 33020: S, code 33021: M).
USE OF OVER-INJECTED REGULATORS
Over injected regulators have a diaphragm with an
inhalation cracking pressure below zero. These
regulators “free flow” easily, and as a result, should not
be used with the Neptune Space or other Neptune masks.
Changes in regulator performance can also be caused by
the different positions assumed during a dive; the use of
a regulator with flow adjustment is recommended.
When descending the adjustment knob must always be turned on to get
the proper air flow. Do not turn off the adjustment knob while
descending.
1ST STAGE SL 35 TX
The Neptune Space may be used with this high performance, balanced diaphragm 1st
stage with anti-freeze kit. The first stage has adjustable medium pressure and is made
of brass with a satin finish body, stainless steel piston, Teflon seat, and stainless steel
spring.
It is available with the following characteristics:
•Standard connection 200 bar (code 9922)
•DIN connection 300 bar (code 9923)
•2 high pressure ports 7/16 -20 UNF
•4 Medium pressure ports 3/8-24 UNF
•Flow rate of approx. 4800 l/m at 140 bars

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AIR CIRCULATION
The Neptune Space air circulation system is designed to minimize fogging and reduce the
amount of CO and CO2 build-up. The silicone oral-nasal pocket is built with two one-way
valves through which air is inhaled.
Exhaled air is directed through a valve under the oral-nasal pocket, limiting the mixing
of this air (containing high amounts of CO2) with the fresh air from the regulator. The
direction of exhaled air is controlled by a four position exhaust valve. The adjustable
valve allows exhaust to flow in four directions:
A—to the left
B—to the right
C—both (direction of least resistance)
D—no exhaust
Position D, the “off” position is used when the diver is in a “head-down” position which,
due to pressure on the second stage, causes the regulator to free flow. Placing the
exhaust valve in the off position causes pressure to build in the mask, preventing free
flow and returning the system to an “air on demand” situation.
EQUALIZATION
The Neptune Space is equipped with a simple patented internal device to close the
nostrils and allow underwater equalization. By loosening the screw it is possible to move
the plate up and down to find the most comfortable position to equalize. The silicone
caps may easily be turned. By turning the caps you may adjust them to fit a larger or
thinner nose (distance between the nostrils). Two additional plastic inserts are supplied.
By removing the silicone cap it is possible to install the insert in the plate (cap post)
increasing the distance of the cap from the plate and allowing it to fit closer to the
nostril. This is sometimes necessary for flatter noses or when a hood is used under the
mask.
To close the nostrils for equalization, simply press the top part of the mask (or push on
the regulator front cover especially if using the visor light). The two equalization
silicone caps will move upward and close the nostrils.
The silicone caps when correctly positioned should allow breathing through the nose and
close the nostrils only when pressing the top part of the mask to equalize

NEPTUNE SPACE Owner’s Manual rel. 9.3
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QUICK STEPS
BEFORE DIVING
1. Adjust the equalization system to fit perfectly your need and test it on your face
until you feel completely comfortable.
2. Don the mask (make sure surface air valve or octopus port is open to allow air in
if installed).
3. Completely pull down the central part of the strap and adjust the 6 straps, middle
ones first, than bottom ones and finally the top ones.

NEPTUNE SPACE Owner’s Manual rel. 9.3
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4. With the LP hose plugged in press the purge button of the 2nd stage and check
that the air flows freely. Release the button and check that air stops flowing.
5. Close surface air valve before descending (if installed).
DURING A DIVE
1. Breathe normally through your nose or mouth, whichever is most comfortable.
2. To equalize, press the front part of the regulator or the top of the mask(without
pushing the purge button).
For more information watch the tutorial videos on www.oceanreefgroup.com

NEPTUNE SPACE Owner’s Manual rel. 9.3
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AFTER DIVING
1. Carefully rinse the regulator with fresh, gently flowing water. Do not press the
purge button.
2. Make sure the dust cover is firmly in place to keep water out of the first stage.
3. Attach the regulator to the tank after rinsing and press the purge button for 10-15
seconds to purge any water or debris from regulator.
4. When storing equipment, do not tightly loop the hoses and avoid pulling on them
when the regulator is attached to the tank. Do not bump the Neptune Space. If
you do, check for any damage.
5. When storing the mask, turn the adjustment knob counterclockwise.
OCEAN REEF highly recommends that you practice in a pool before using your mask
in open water.
PURGING
The mask can easily be purged in the event that water enters the mask by pressing the
exhaust button on the second stage. The water will flow out of the lower valve. The
diver should be facing straight ahead, with the exhaust valve being the LOWEST part of
the system.
SERIAL NUMBER
The regulator housing is marked with a serial number that identifies the product for
warranty purposes.

NEPTUNE SPACE Owner’s Manual rel. 9.3
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MAINTENANCE AND CLEANING
TYPE OF ACTION
BEFORE A
DIVE
AFTER A
DIVE
EVERY
YEAR
EVERY 2
YEARS
RINSE
X
GENERAL FUNCTION
CHECK
X
REGULATOR SERVICING
X
MASK SERVICING
X
For optimum longevity of the mask and the proper functioning of its parts we
recommend rinsing the mask thoroughly in fresh water after every use. DO NOT
clean the visor with any abrasive materials. We recommend drying the visor,
especially the inside parts, with a soft, clean cloth.
STORAGE
The mask must be stored in a dry place with no direct sunlight and far from sources of
heat. Do not store it at temperatures below -4°F (-20°C) or above +122°F (+50°C). We
suggest you use the AC-4 visor protector and the carrying bag included in the package
when storing the mask to avoid accidental abrasion (see section 2.4.3).

NEPTUNE SPACE Owner’s Manual rel. 9.3
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COMMUNICATION
COMMUNICATION APPARATUS
The Neptune Space may be used with various communication systems between divers
and/or the surface. It is compatible with most underwater communication systems if
supplied with the proper adapter and/or DIN connection. Information may be obtained
from your OCEAN REEF dealer.
INSTALLING THE UNDERWATER COMMUNICATION SYSTEM
The microphone support (PTT) is screwed into the connection located on the left side of
the mask and identified with the words COMMUNICATION SYSTEM. The COM unit is
installed on the left side of the head harness attaching the Neptune Assembly
Connection System (NACS) on the 2 visor supports as per NACS/COM unit instructions.
For more information watch the tutorial videos on www.oceanreefgroup.com
USE OF THE UNDERWATER COMMUNICATION SYSTEM
For correct use of the underwater communication system read the specific manual.

NEPTUNE SPACE Owner’s Manual rel. 9.3
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TROUBLESHOOTING
VISOR FOGS
Warning: Fogging is a Signal That Mask Is Not Positioned Correctly On Face!
a) orinasal mask positioned incorrectly or pinched.
b) orinasal mask improperly seated—check that it is properly tucked around
communication port and exhaust valve.
c) Top harness straps pulled too tightly—loosen.
d) Bottom harness straps not pulled tight enough.
AIR LEAKS
a) Hair/hood trapped inside mask skirt.
b) Sewing on hood—skirt will not necessarily seal on all hoods, especially if sewing on
hood is where mask skirt fits.
c) Straps pulled too tightly or improperly.
REGULATOR FREE-FLOWS
a) Adjustment knob opened too much—regulate by closing knob in face-down
position.
b) Purge button has sand/pebbles stuck inside.
c) Regulator needs servicing *.
d) 1st stage intermediate pressure not 140±3 psi / 9.5→9.8 bar.
REGULATOR HARD TO BREATHE THROUGH
a) Adjustment knob closed too much—regulate by opening knob in face-down
position.
b) Regulator needs servicing *.
c) 1st stage intermediate pressure not 140±3 psi / 9.5→9.8 bar.
FFM VIBRATES
a) Harness straps not adjusted properly—tighten bottom straps.
b) Adjustment knob opened too much.
c) Neptune Space adjustment too soft—make proper adjustment with adjustment
tool *.
d) 1st stage intermediate pressure not 140±3 psi / 9.5→9.8 bar.
* OCEAN REEF recommends that the regulator be serviced at least once a year, or
after 100 dives. This should only be performed by an OCEAN REEF dealer or an
authorized OCEAN REEF repair station which uses original spare parts. This also
applies to any periodic serving and/or repairs required.

NEPTUNE SPACE Owner’s Manual rel. 9.3
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NEPTUNE SPACE Owner’s Manual rel. 9.3
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Neptune Space rel 9.0
Part
Code
Key
q.ty
Part
Code
Key
q.ty
Visor –Space
7015
16
1
Space reg. front cover metall.
20081
19
1
Space reg. front cover (black)
6960
19
1
N-6AS Face seal black medium /
large
1351
7
1
Screw short –Space regulator
front cover -M3
6962
20
1
N-6AS Face seal black small /
medium
1363
7
1
Screw long –Space regulator
front cover-M3
6961
21
2
N-6AS Face seal yellow medium /
large
1350
7
1
O-ring 2010
6965
22
7
N-6AS Face seal orange medium /
large
OR003117
7
1
Silicone button w/Space logo-
black
20082
18
1
Silicone button w/Space logo-
yellow
OR003104
18
1
Clamping Band
6801
3
1
Silicone button w/Space logo-
orange
OR003105
18
1
NG-23 Screw M3X14
6528
5
1
Inhal. Diaphragm w/puck-Space
6781
17
1
NG-24 Nut M3 3mm
6529
6
8
FRB2 buckle
9002
2
6
Orinasal black 22mm holes(2)
28(1)
1349
8
1
M-8 Strap for FRB2 buckle
9003
1
1
Orinasal valve holder
1377
66
2
Prof. Quick release male part
OR003093
4
2
Orinasal valve
1376
9
2
Prof. Quick release female part
OR003094
4a
2
MI-14 Orinasal Band
6718
10
1
Screw M3x6
OR005281
70
4
Eccentric Equal. Block (2pcs)
6924
11
2
Equalizer extension ,short (2pcs)
6926
2
Adjustment knob silicon black
OR003070
46
1
Equalizer extension , long (2pcs)
6927
2
Adjustment knob silicone yellow
OR003071
46
1
Equalizer extension , XL (2pcs)
6928
2
Adjustment knob silicone orange
OR003072
46
1
Screw M4x8
15255
12
1
Adjustment screw
16456
43
1
Washer M4 for screw M4x8
15253
13
1
O-ring 2068
15446
42
1
SB-5A Equalizer
6925
14
1
Trim screw
15750
44
1
Regulator housing –Space
w/drain. hole
8448
15
1
Balance poppet chamber
15470
41
1
Spring l 33-Ø thread 0,9-Ø.int.8,4
6966
39
1
NG-10 side connector bushing
6514
55
1
Spring l 8,5-Ø thread 0,9-Ø int.5,5
6980
40
1
O-ring 47x1,5
6501
54
2
O-ring 2.5 x 1
15439
37
1
Surface air valve body
8656
53
1
Balanced poppet
9675
36
1
O-ring 2081
9644
50
1
Seat balanced poppet
8866
35
1
O-ring 3112
8643
51
1
Nozzle
9672
30
1
O-ring 3168
8644
52
1
O-ring 2025
9673
29
1
Thread locking ring for Diamond
surface air valve rel 7
8669
49
1
Regulator body
15532
32
1
Diamond surface air valve cup
8902
48
1
O-ring 114
9420
31
1
Body washer
15257
24
1
MP-2 Com System bushing
6549
56
1
Hex nut
15433
23
1
NG-9 Side Connector
6304
57
1
Demand lever
15448
33
1
NG-13 Standard seal
1361
58
1
Wedge
15447
34
1
NG-9B Plug
6515
59
1
Insert
6970
26
1
OR 2075
6964
25
1
NG-15 Bushing w/holes
6518
65
1
dive/predive
6972
28
1
O ring 2131
6710
64
1
O-ring 24 X 2
6963
27
1
Directional Exhaust valve holder
rel 8.0
OR006510
63
1
Directional Exhaust valve
deflector rel 8.0
6504
61
1
ER-09 Exhalation valve
8811
62
1
Directional Exhaust valve cover
rel 8.0
OR006511
60
1
800 mm standard hose
9950
Hose protector
9311
Annual Maintenance Kit Space
9800

NEPTUNE SPACE Owner’s Manual rel. 9.3
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NEPTUNE SPACE Owner’s Manual rel. 9.3
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Key
Code
R-DIN
R-YOKE
Designation
1
9810
1
1
Retaining cap
2
9811
1
1
Diaphragm Ø33 x 1.5
3
9812
1
1
Pressure piston
4
9813
1
1
Intermediate ring
5
9814
1
1
Anti freeze kit
6
9815
1
1
Adjusting screw
7
9816
1
1
Spring
8
9817
1
1
Spring Plate
9
9818
1
1
Friction Ring
10
9819
1
1
Diaphragm Ø36.9 x 2
11
9820
1
1
Piston guide
12
9821
1
1
Regulator body
13
9822
3
3
LP plug, 3/8 UNF
14
9823
4
4
O-ring 7,65 x 1,78
15
9824
1
1
Piston
16
9825
1
1
Guide ring
17
9826
1
1
Spring
18
9827
1
1
Retaining cap
19
9620
1
1
O-ring 2,9 x 1,78(2012)
20
9829
1
1
Back pressure ring 3,2 x1,5
21
9411
1
1
O-ring 14,00 x 1,78(2056)
22
9831
1
1
Balancing chamber
23
9832
2
2
O-ring 8,73 x 1,78
24
9833
2
2
HP plug, 7/16 UNF
25
9834
1
Yoke INT, 9/16-18 UNF
26
9835
1
Yoke screw, 9/16-18 UNF
27
7831
1
2
O-ring 9,25 x 1,78 (2037)
28
9837
1
Yoke fastener
29
9838
1
Filter element YOKE
30
9839
1
Retaining ring
31
9840
1
Hand wheel fastener, 300 bar
32
9841
1
Filter element DIN
33
9842
1
Hand wheel DIN, 300 bar
34
9843
1
O-ring 10,82 x 1,78
35
9844
1
Retaining screw DIN, 300 bar
36
9845
1
O-ring 11,00 x 2,5
37
9846
Conversion kit, YOKE
38
9847
Conversion kit DIN, 300 bar

NEPTUNE SPACE Owner’s Manual rel. 9.3
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Warranty
1. OCEAN REEF Neptune Space have a limited lifetime warranty to be free of
material or manufacturing defects of any component but the regulator ones.
2. Regulator parts are guaranteed to be free of material or manufacturing defects
for a period of 24 months from the time the unit is purchased.
3. . For the duration of the guarantee, the Company’s responsibility is limited to
replacement of any parts that are defective in our opinion, and that have not
been used incorrectly or handled negligently. The mask must be returned to the
outlet from which it was bought, along with the warranty card
4. Even during the guarantee period, this guarantee shall not be valid where:
oDamage was caused by incorrect handling or carelessness.
oDamage was caused by the mask falling after it was purchased.
oDamage caused by fire, earthquake, floods, lightning, or other natural
disasters.
oThe warranty card is not produced.
oOur name, the date of purchase, and the seller’s name do not appear on
the warranty card.