Arrrrrggghhh V4Tec BOV

Mark Chase · 13th October 2006, 16:11

Quote: (Originally Posted by paronix)

Maybe you are right. I'm not sure. All I know is that it holds a negative, so guessed it used a different mechanism to the v4tec.

As far as i am aware its the same as the V4tec and its all down to luck if it holds Neg or not based on which end of the tolerance scale you are.

Didn't think you could get the Bob one any more but I like the sound of the Divematics.

Ill look into the cost of machining an 0 ring groove into the V4tec. It cant be that hard to do with a multi axis CNC milling head

ATB

Mark Chase

lof · 13th October 2006, 17:49

Quote: (Originally Posted by colinicky)

I thought the Golem had some O rings but still relyed on close tolerance for the seal between oc/cc side ? I thought the Bob Howell & the Divematics were the only 2 with enough O rings to seal the bov between oc/cc & outside .

No,
the Golem BOV uses o-rings to seal around the ball valve (standard in gas applications). You can adjust the o-ring tension by rotating the grooved retaining split-rings.
We are putting together service manual/video that will show it better than I can explain.
You can see the ball valve and split-rings here: https://www.golemgear.com/showgaller...d=3&slideidx=9
Golem BOv passes the neg test fine.

NickK · 14th October 2006, 07:53

[quote
Didn't think you could get the Bob one any more but I like the sound of the Divematics.
[/quote]

Very happy with Divematics BOV, passes +/- with no problem. Longest negative test had for ~5 hours, very easy to switch OC/CC. Easy to breath. Excellent quality.

Nick

RichardGreen · 14th October 2006, 08:24

Quote: (Originally Posted by lof)

No,
Golem BOv passes the neg test fine.

I'll second that, I have one, neg test no poblem.

Richard Green

**Steve** · 14th October 2006, 09:39

Phi,

Can you help me out here please. At a guess I have played with 20 Jetsam OC/CC DSVs and have never had one fail a neg test. My personal ones have been in use for years. I think you mentioned once that you had an issue and hence me asking you as you have played with a few models.

<edit> Sorry, I have had 1 fail. It was after I lent it to someone that decided to pull it apart and put it back together incorrectly.

decoweenie · 14th October 2006, 11:56

Quote: (Originally Posted by Steve)

Phi,

Can you help me out here please...

Steve,

All of my Jetsam BOVs held negative pressure fine from the original large Sherwood reg to the lastest before the switch to Mares. What I said (in the past) were:

My units do not hold negative pressure overnight (which is totally unnecessary IMHO, and not good for the diaphgram)
My BOVs do not hold negative pressure when the LP hose isn't connected, but do not leak when in OC mode u/w.

diverklondike · 14th October 2006, 13:13

Quote: (Originally Posted by Mark Chase)

Sooooooooo your telling me to go stick my head in a bucket?

OK i have been told to do worse

ATB

Mark Chase

I have a BIG bucket that you can borrow if you need one...

Mark Chase · 15th October 2006, 14:29

Quote: (Originally Posted by diverklondike)

I have a BIG bucket that you can borrow if you need one...

Yeahhh those V4tec's are a bit on the big side

ATB

Mark Chase

Lord M · 18th October 2006, 23:34

After reading all this I think I'll wait for the AP BOV, it shouldn't be long now, and it doesn't affect the WOB apparently.

Mark Chase · 19th October 2006, 08:57

Quote: (Originally Posted by Lord M)

After reading all this I think I'll wait for the AP BOV, it shouldn't be long now, and it doesn't affect the WOB apparently.

Dived the V4Tec yesterday to 55m. Very comfortable, totally dry and WOB was fine no noticeable difference to the inspo.

Bailout knob turns easier in the water than on land, Going OC was no problem but the WOB on the reg wasn't that much better than the Paragon on the KISS. About the same I would say. I am going to have a go at tuning it for the nextdive.

ATB

Mark Chase

13th October 2006, 16:11	#21 (permalink)
Mark Chase I go down for ages Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Jan 2005 Location: Kent Posts: 2,700	Re: Arrrrrggghhh V4Tec BOV Quote: (Originally Posted by paronix) Maybe you are right. I'm not sure. All I know is that it holds a negative, so guessed it used a different mechanism to the v4tec. As far as i am aware its the same as the V4tec and its all down to luck if it holds Neg or not based on which end of the tolerance scale you are. Didn't think you could get the Bob one any more but I like the sound of the Divematics. Ill look into the cost of machining an 0 ring groove into the V4tec. It cant be that hard to do with a multi axis CNC milling head ATB Mark Chase __________________ Is it supposed to make that noise ? I took my unit to the dive shop and demanded they bolt on every thing that would fit. Join my elite diving teem and get a Tshirt "Doing It Chasey"Hammerhead Eccr Advanced Diving System
(Offline)

13th October 2006, 17:49	#22 (permalink)
lof RebreatherWorld Sponsor Current Rebreather/s: Megalodon Prism Topaz Sport Kiss Classic Kiss MK 15.X Other CCR RB80 / Clone Other SCR Home Build Other Rebreather/s: Other CCR RB80 / Clone Other SCR Home Build Join Date: Jun 2005 Location: USA Posts: 480	Re: Golem O rings Quote: (Originally Posted by colinicky) I thought the Golem had some O rings but still relyed on close tolerance for the seal between oc/cc side ? I thought the Bob Howell & the Divematics were the only 2 with enough O rings to seal the bov between oc/cc & outside . No, the Golem BOV uses o-rings to seal around the ball valve (standard in gas applications). You can adjust the o-ring tension by rotating the grooved retaining split-rings. We are putting together service manual/video that will show it better than I can explain. You can see the ball valve and split-rings here: https://www.golemgear.com/showgaller...d=3&slideidx=9 Golem BOv passes the neg test fine. __________________ Jakub Golem Gear ShopKeeper www.golemgear.com Last edited by lof : 13th October 2006 at 17:51.
(Online)

14th October 2006, 07:53	#23 (permalink)
NickK New Member Current Rebreather/s: Evolution Other Rebreather/s: Evolution Join Date: Nov 2005 Location: Vancouver Island Posts: 90	Re: Arrrrrggghhh V4Tec BOV [quote Didn't think you could get the Bob one any more but I like the sound of the Divematics. [/quote] Very happy with Divematics BOV, passes +/- with no problem. Longest negative test had for ~5 hours, very easy to switch OC/CC. Easy to breath. Excellent quality. Nick
(Offline)

14th October 2006, 08:24	#24 (permalink)
RichardGreen Internet Dive Guru Current Rebreather/s: Inspiration Vision Evolution Other Rebreather/s: Join Date: Sep 2005 Location: UK Posts: 140	Re: Golem O rings Quote: (Originally Posted by lof) No, Golem BOv passes the neg test fine. I'll second that, I have one, neg test no poblem. Richard Green
(Offline)

14th October 2006, 09:39	#25 (permalink)
Steve Ladies bring a plate Current Rebreather/s: Megalodon Home Build Other Rebreather/s: Not Bought Yet Inspiration Classic Sport Kiss Classic Kiss MK 15.X Home Build Join Date: Feb 2005 Location: Perth - Australia Posts: 1,117	Re: Arrrrrggghhh V4Tec BOV Phi, Can you help me out here please. At a guess I have played with 20 Jetsam OC/CC DSVs and have never had one fail a neg test. My personal ones have been in use for years. I think you mentioned once that you had an issue and hence me asking you as you have played with a few models. <edit> Sorry, I have had 1 fail. It was after I lent it to someone that decided to pull it apart and put it back together incorrectly. __________________ WARNING: I contain occasional coarse language, extreme sexual references, nudity, and adult themes, which may offend some people - Usually churchy types.
(Online)

14th October 2006, 11:56	#26 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,487	Re: Arrrrrggghhh V4Tec BOV Quote: (Originally Posted by Steve) Phi, Can you help me out here please... Steve, All of my Jetsam BOVs held negative pressure fine from the original large Sherwood reg to the lastest before the switch to Mares. What I said (in the past) were: My units do not hold negative pressure overnight (which is totally unnecessary IMHO, and not good for the diaphgram) My BOVs do not hold negative pressure when the LP hose isn't connected, but do not leak when in OC mode u/w. __________________ "...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..." - Rebreather World PM
(Offline)

14th October 2006, 13:13	#27 (permalink)
diverklondike Just one of the Peasants Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Oct 2005 Location: Delaware, USA Posts: 1,613	Re: Arrrrrggghhh V4Tec BOV Quote: (Originally Posted by Mark Chase) Sooooooooo your telling me to go stick my head in a bucket? OK i have been told to do worse ATB Mark Chase I have a BIG bucket that you can borrow if you need one...
(Offline)

15th October 2006, 14:29	#28 (permalink)
Mark Chase I go down for ages Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Jan 2005 Location: Kent Posts: 2,700	Re: Arrrrrggghhh V4Tec BOV Quote: (Originally Posted by diverklondike) I have a BIG bucket that you can borrow if you need one... Yeahhh those V4tec's are a bit on the big side ATB Mark Chase __________________ Is it supposed to make that noise ? I took my unit to the dive shop and demanded they bolt on every thing that would fit. Join my elite diving teem and get a Tshirt "Doing It Chasey"Hammerhead Eccr Advanced Diving System
(Offline)

18th October 2006, 23:34	#29 (permalink)
Lord M New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: May 2006 Location: Central Cornwall. Posts: 58	Re: Arrrrrggghhh V4Tec BOV After reading all this I think I'll wait for the AP BOV, it shouldn't be long now, and it doesn't affect the WOB apparently.
(Offline)

19th October 2006, 08:57	#30 (permalink)
Mark Chase I go down for ages Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Jan 2005 Location: Kent Posts: 2,700	Re: Arrrrrggghhh V4Tec BOV Quote: (Originally Posted by Lord M) After reading all this I think I'll wait for the AP BOV, it shouldn't be long now, and it doesn't affect the WOB apparently. Dived the V4Tec yesterday to 55m. Very comfortable, totally dry and WOB was fine no noticeable difference to the inspo. Bailout knob turns easier in the water than on land, Going OC was no problem but the WOB on the reg wasn't that much better than the Paragon on the KISS. About the same I would say. I am going to have a go at tuning it for the nextdive. ATB Mark Chase __________________ Is it supposed to make that noise ? I took my unit to the dive shop and demanded they bolt on every thing that would fit. Join my elite diving teem and get a Tshirt "Doing It Chasey"Hammerhead Eccr Advanced Diving System
(Offline)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode