> Yahoo! is not affiliated with the authors of this page or responsible for its content.
Golem BOV Service Manual Golem BOV Service/Maintenance Manual

Participation in rebreather diving can result in serious injury or death!

Golem BOV is a Dive Surface Valve / Open Circuit
regulator for rebreathers. The BOV can be switched from
closed circuit to open circuit mode by rotating the handle
on the front.

The BOV should be inspected and lubricated every six
months, more often when diving in harsh conditions. Also,
whenever the switching action between CC and OC
becomes difficult, disassemble the BOV, inspect all o-rings
and relubricate. O-rings should be replaced annually. The
Apeks 2
nd
stage should be serviced by an Apeks technician
according to manufacturers specifications. The Interspiro diaphragm can be replaced with the
same from the manufacturer. The BOV can also be sent to Golem Gear, Inc. for service.
Please contact us at the address below to arrange the details.



You will need:

2.5mm hex key
Needle-nose pliers
Brass or plastic hook

Remove one-way valves

Use a brass hook to gently pull the one-way valve
holder by pulling on each spoke sequentially. Take
care not to puncture the rubber valve.

Golem Gear, Inc. contact
sales@golemgear.com
for warranty and service On the exhalation side, lift the flapper valve to reach the
holder spokes.

On the Clamped BOV pull gently on the circumference of
the one-way valve holder


Remove retaining washers

Insert needle-nose pliers into the two holes of the retaining
washer; pull together while pulling the washer out of the
groove.
Golem Gear, Inc. contact
sales@golemgear.com
for warranty and service
Alternatively, you can use the hook to pull on one of the
holes of the retaining washer and twist it out of the groove.
Remove retaining washer on the other side as well.
Remove the ball valve

Unscrew four hex screws (M3-16) from the ball valve cover.

Pull the ball cover (and the ball valve) out of the BOV body.
Make sure that BOTH retaining washers from the inhalation
and exhalation ports are removed, otherwise you will not be
able to remove the ball valve, and might damage the BOV.
Golem Gear, Inc. contact
sales@golemgear.com
for warranty and service
Remove the ball valve handle

Unscrew the two hex screws (M4-20) on the valve handle.


Separate the ball valve from the valve cover.
Inspect o-ring on the valve cover.
Inspect the o-rings on the ball valve.
Golem Gear, Inc. contact
sales@golemgear.com
for warranty and service

Remove 2
nd
stage

Unscrew the diaphragm cover.
Locate four hex screws (M3-14) inside the 2
nd
stage
case.




Golem Gear, Inc. contact
sales@golemgear.com
for warranty and service Unscrew all four screws.
Remove the 2
nd
stage case

Make sure the o-ring between the BOV and 2
nd
stage is not
lost.
Remove ball valve seats

There are convex valve seats on the inside of the inhalation
and exhalation ports. Push them out with your thumb, and
inspect the o-rings.


Golem Gear, Inc. contact
sales@golemgear.com
for warranty and service Take extreme care to insert the ball valve seat properly
when returning it. A pinched o-ring will render the BOV
inoperative!!

Inspect/replace all o-rings

1x ball valve handle
1x - ball valve to mouthpiece
1x ball valve cover
4x ball valve seat (two each)
1x BOV box to 2
nd
stage body
2x one-way valves (one each)

Lightly lubricate all o-rings with O
2
compatible grease.


Assemble the BOV in reverse order

Insert valve seat on each side of hose ports. Do not
pinch o-rings!
Attach ball valve to valve cover and to valve handle
with two hex screws (M4-20).
Insert ball valve into the BOV body. Make sure that
the o-rings in the valve seats are in proper place.
Insert the retaining washers.
Screw in the four hex screws (M3-16) into the ball
valve cover.
Attach the 2
nd
stage body to the BOV using four hex
screws (M3-14). Make sure that there is an o-ring
around the 2
nd
stage port on the BOV. Take care to
properly seat the OC pod to the body of the BOV.
Lubricate the captured o-ring with O
2
compatible
grease, and make sure that it is seated correctly
between the OC pod and the BOV body.




Golem Gear, Inc. contact
sales@golemgear.com
for warranty and service

Insert the one-way valves. Make sure that the o-rings
on the circumference of the one-way valve body are
lightly lubricated and seated properly.

!!! Always verify that the one-way valves are in
the correct position to circulate gas according to
your rebreather specifications!!! Failure to do so
can result in serious injury or death!!!



The gas will travel into the flapper
valve in which the spokes are
visible, and out of the valve with
rubber flapper on top.

Make sure that each valve has the
correct orientation.




Inspect the 2
nd
stage diaphragm
OUT
IN

Check the diaphragm body for punctures. Also verify the
operation of the one-way exhaust valve in the center.


Golem Gear, Inc. contact
sales@golemgear.com
for warranty and service
Make sure that the diaphragm is seated properly, and
that there is an o-ring on the circumference. The center of
the diaphragm must be seated in the center of the purge
button on the 2
nd
stage cover


Screw in the 2
nd
stage cover.
Golem Gear, Inc. contact
sales@golemgear.com
for warranty and service
That completes assembly of the BOV.


This BOV is composed of many parts, all of which will eventually fail. Always
carry adequate bailout, and have the proper training and skills to use it.
Ultimately, you, the diver, have the responsibility for your safety while diving.

!!! Do not get in the water if your unit with this BOV attached does not pass
standard loop integrity tests. Always verify that the one-way valves are in the
correct position to circulate gas according to your rebreather specifications!!!



Golem Gear, Inc. contact
sales@golemgear.com
for warranty and service