Golem Shrimp for JJ

Igor · September 20th, 2012, 11:18 PM

Looks like the JJ BOV is gonna take awhile because of the CE ? So what is my best bet? The Golem shrimp? Im diving in cold water. Anyone tried it in really cold waters OC at depth? Prone to free flow? Based on Apeks? WOB OC and CCR compared to JJ BOV?

They have lots of versions. Which one fits the JJ? What parts should i order? What length LP hose etc.

Thanks in advance

GKAM · September 21st, 2012, 06:17 AM

Quote: (Originally Posted by Igor)

The Golem shrimp? Im diving in cold water. Anyone tried it in really cold waters OC at depth? Prone to free flow? Based on Apeks?

I cannot comment on suitability on the JJ, but as far as cold water diving goes, the shrimp performs flawlessly. The deepest I have tried it in cold water was 75m at 4C water temp. Coldest external temperature prior to a dive was -12C. No problems at all. Breathing is very smooth and O-rings do not leak with temperature fluctuations. The Shrimp is a well designed BOV with the correct machining tolerances.

/GKAM

Igor · September 21st, 2012, 03:32 PM

Quote: (Originally Posted by GKAM)

I cannot comment on suitability on the JJ, but as far as cold water diving goes, the shrimp performs flawlessly. The deepest I have tried it in cold water was 75m at 4C water temp. Coldest external temperature prior to a dive was -12C. No problems at all. Breathing is very smooth and O-rings do not leak with temperature fluctuations. The Shrimp is a well designed BOV with the correct machining tolerances.

/GKAM

Ok, sounds good. So what version Shrimp should i order for the JJ?

Dave Sutton · September 21st, 2012, 04:43 PM

Just an idea... I have a brand new JJ BOV set up for a JJ here that I could toss in a box and send. You would want to do the small modification that has proven to be a success, and would then have the "correct' BOV for the rig.

PM if interested.

Dave

.

divingtactics · September 22nd, 2012, 02:17 AM

Quote: (Originally Posted by Igor)

Ok, sounds good. So what version Shrimp should i order for the JJ?

You use the one for the Dolphin with left feed, I have just bought one and got the Diva HUD holder, then had a small sleeve machined to fit the HUD into the holder. One of the nice things about the Shrimp is that you don't use any hose clamps, cable ties or anything to secure the hoses. It comes with an inner sleeve and then you fit the outer sleeve over the hose and it is sealed by compression. The other nice thing is that you can remove the BOV hoses really easily with the bayonet fittings, so it allows you to check your flapper valves after every dive and dry your hoses out quicker.

The Shrimp breathes a lot better than the JJ BOV, which my unit came with, and I did the Mods as suggested but it still forces air out of the exhaust diaphragm on hard inhalations. In addition to this, when the inhale flapper valve was wet, it would leak air past it when doing a loop pressure test. The only Mod I didn't do was the one suggested my Techdiverdude but I've seen his one first hand and it looked good. I have now replaced the barrel and put the JJ BOV back to standard as I may sell it and I wouldn't want to sell a modded bit of kit.

Here are a couple of pics of the Shrimp on the JJ hoses.

PeteG · September 22nd, 2012, 06:36 AM

When ya jumping in to let us knows what it's like in use? Interested to hear how it goes.

Michael Thornton · September 22nd, 2012, 07:11 AM

We have sold numerous Shrimps to people diving all different rebreathers. Not one has had anything negative to say. You will be happy with your decision.

Sent from my iPhone using Tapatalk

Hodge Close · September 22nd, 2012, 09:44 AM

Where do you buy them in the UK?

**Mark Chase** · September 22nd, 2012, 10:53 AM

I switched from a JJ BOV to the Golum Shrimp

Very nice unit, les jaw fategue and it breaths well on OC. In CCR mode the WOB of the JJ is aparently better but not noticably so.

I have the dolphin type fittings and Diva mount with home made HUD holder

(I choped up a SS jube clip to make it)

Best bit is the quick release for stripping it to drain the loop hoses rather than unscrewig the hose from the unit.

ATB

Mark

Igor · September 22nd, 2012, 09:29 PM

Looks like a high quality product and someone mentioned testing it at depth in cold water with good results to. Anyone tried the JJ BOV in cold water?

September 20th, 2012, 11:18 PM	#1 (permalink)
Igor Ingemar Lundgren Join Date: Sep 2012 Location: Sweden Posts: 146 Thanks: 35 Thanked 61 Times in 24 Posts	Golem Shrimp for JJ Looks like the JJ BOV is gonna take awhile because of the CE ? So what is my best bet? The Golem shrimp? Im diving in cold water. Anyone tried it in really cold waters OC at depth? Prone to free flow? Based on Apeks? WOB OC and CCR compared to JJ BOV? They have lots of versions. Which one fits the JJ? What parts should i order? What length LP hose etc. Thanks in advance
(Offline)

September 21st, 2012, 06:17 AM	#2 (permalink)
GKAM digital nomad Join Date: Apr 2012 Location: Munich Posts: 14 Thanks: 0 Thanked 2 Times in 1 Post	Quote: (Originally Posted by Igor) The Golem shrimp? Im diving in cold water. Anyone tried it in really cold waters OC at depth? Prone to free flow? Based on Apeks? I cannot comment on suitability on the JJ, but as far as cold water diving goes, the shrimp performs flawlessly. The deepest I have tried it in cold water was 75m at 4C water temp. Coldest external temperature prior to a dive was -12C. No problems at all. Breathing is very smooth and O-rings do not leak with temperature fluctuations. The Shrimp is a well designed BOV with the correct machining tolerances. /GKAM
(Offline)

September 21st, 2012, 03:32 PM	#3 (permalink)
Igor Ingemar Lundgren Join Date: Sep 2012 Location: Sweden Posts: 146 Thanks: 35 Thanked 61 Times in 24 Posts	Quote: (Originally Posted by GKAM) I cannot comment on suitability on the JJ, but as far as cold water diving goes, the shrimp performs flawlessly. The deepest I have tried it in cold water was 75m at 4C water temp. Coldest external temperature prior to a dive was -12C. No problems at all. Breathing is very smooth and O-rings do not leak with temperature fluctuations. The Shrimp is a well designed BOV with the correct machining tolerances. /GKAM Ok, sounds good. So what version Shrimp should i order for the JJ?
(Offline)

September 21st, 2012, 04:43 PM	#4 (permalink)
Dave Sutton Banned Join Date: Mar 2012 Location: Union Beach, New Jersey Posts: 1,281 Thanks: 73 Thanked 189 Times in 103 Posts	Just an idea... I have a brand new JJ BOV set up for a JJ here that I could toss in a box and send. You would want to do the small modification that has proven to be a success, and would then have the "correct' BOV for the rig. PM if interested. Dave .
(Offline)

September 22nd, 2012, 02:17 AM	#5 (permalink)
divingtactics Serious Swagelok Addict Join Date: Mar 2012 Location: Melbourne Australia Posts: 156 Thanks: 17 Thanked 16 Times in 15 Posts	Quote: (Originally Posted by Igor) Ok, sounds good. So what version Shrimp should i order for the JJ? You use the one for the Dolphin with left feed, I have just bought one and got the Diva HUD holder, then had a small sleeve machined to fit the HUD into the holder. One of the nice things about the Shrimp is that you don't use any hose clamps, cable ties or anything to secure the hoses. It comes with an inner sleeve and then you fit the outer sleeve over the hose and it is sealed by compression. The other nice thing is that you can remove the BOV hoses really easily with the bayonet fittings, so it allows you to check your flapper valves after every dive and dry your hoses out quicker. The Shrimp breathes a lot better than the JJ BOV, which my unit came with, and I did the Mods as suggested but it still forces air out of the exhaust diaphragm on hard inhalations. In addition to this, when the inhale flapper valve was wet, it would leak air past it when doing a loop pressure test. The only Mod I didn't do was the one suggested my Techdiverdude but I've seen his one first hand and it looked good. I have now replaced the barrel and put the JJ BOV back to standard as I may sell it and I wouldn't want to sell a modded bit of kit. Here are a couple of pics of the Shrimp on the JJ hoses. Last edited by divingtactics; September 22nd, 2012 at 02:30 AM. Reason: More info.
(Offline)

September 22nd, 2012, 06:36 AM	#6 (permalink)
PeteG New Member Join Date: Sep 2012 Location: Newcastle, Australia Posts: 13 Thanks: 6 Thanked 8 Times in 2 Posts	When ya jumping in to let us knows what it's like in use? Interested to hear how it goes.
(Offline)

September 22nd, 2012, 07:11 AM	#7 (permalink)
Michael Thornton Dive Addicts Join Date: Aug 2012 Location: Utah Posts: 329 Thanks: 118 Thanked 60 Times in 36 Posts	We have sold numerous Shrimps to people diving all different rebreathers. Not one has had anything negative to say. You will be happy with your decision. Sent from my iPhone using Tapatalk __________________ --Michael Thornton CCR Cave Instructor www.DiveAddicts.com www.CCRMichael.com TEKDiveUSA.2014 - The North American two day advanced and technical diving conference. Miami, FL - May 17-18, 2014
(Offline)

September 22nd, 2012, 09:44 AM	#8 (permalink)
Hodge Close I own a Brewery Join Date: Mar 2012 Location: Cumbria Posts: 64 Thanks: 5 Thanked 4 Times in 4 Posts	Where do you buy them in the UK?
(Offline)

September 22nd, 2012, 10:53 AM	#9 (permalink)
Mark Chase ATB=AlwaysTalkingBollocks Join Date: Mar 2012 Location: Kent England Posts: 483 Thanks: 62 Thanked 163 Times in 67 Posts	I switched from a JJ BOV to the Golum Shrimp Very nice unit, les jaw fategue and it breaths well on OC. In CCR mode the WOB of the JJ is aparently better but not noticably so. I have the dolphin type fittings and Diva mount with home made HUD holder (I choped up a SS jube clip to make it) Best bit is the quick release for stripping it to drain the loop hoses rather than unscrewig the hose from the unit. ATB Mark
(Online)

September 22nd, 2012, 09:29 PM	#10 (permalink)
Igor Ingemar Lundgren Join Date: Sep 2012 Location: Sweden Posts: 146 Thanks: 35 Thanked 61 Times in 24 Posts	Looks like a high quality product and someone mentioned testing it at depth in cold water with good results to. Anyone tried the JJ BOV in cold water?
(Offline)