Loud buzzing noise from 02 bleed orifice

diverdman · 8th December 2009, 08:06

Hi All, need some advice:
rEvo III, my partners o2 orifice bleed valve is making a buzzing sound - much like a small alarm clock. We have done a number of checks.

Flow rate is fine, IP is within range checked on two independant IP gauges. We got the units in September this year done about 20 - 25 hours, religious with cleaning. The noise coming from the orifice is audible from the next room...it is loud...Anyone had this issue? Any ideas on resolve because carrying an alarm clock on a dive is no fun

.
Cheers Helen Grigg

paulraymaekers · 8th December 2009, 09:25

Quote: (Originally Posted by diverdman)

Hi All, need some advice:
rEvo III, my partners o2 orifice bleed valve is making a buzzing sound - much like a small alarm clock. We have done a number of checks.

Flow rate is fine, IP is within range checked on two independant IP gauges. We got the units in September this year done about 20 - 25 hours, religious with cleaning. The noise coming from the orifice is audible from the next room...it is loud...Anyone had this issue? Any ideas on resolve because carrying an alarm clock on a dive is no fun

.
Cheers Helen Grigg

best ask the manufacturer directly

it is not the orifice, but the non-return valve, that sometimes buzzes due to the very low flow
there is a simple fix for that
will send it by mail
paul

safagamarc · 8th December 2009, 14:06

Hi Helen,

Had the same sort of thing on my unit it was abit of a hummingbird as Paul calls it. It is a real quick fix and Paul will sort it out. Enjoy the diving down under and remember to say "Thank yyou Paul"

Greetings,
Marc

Dsix36 · 8th December 2009, 21:00

What is the quick fix? Do you replace the one-way valve or is there something else that can be done to repair the valve?

NJdiver85 · 8th December 2009, 21:06

Paul posted the fix a while back, with pictures. Basically, you remove the check valve and blow O2 lube through the inlet. I had to do this once early on with my unit, and then again a few months later. So far so good, but if it returns, I may get a new check valve.

Tybo · 9th December 2009, 08:59

Just have a look here :
http://www.rebreatherworld.com/revo-...e-problem.html

every thing is explained ! and with pictures !

A+
Tybo

diverdman · 9th December 2009, 09:09

Cheers all - nice to be on a helpful forum site -

...all fixed - alarm clock off..Paul sent on instructions. ..we did do an initial search but had the wrong wording so didn't find posts..

p.s said manufacturer is always extemely helpful and prompt in replying - in this case I hear on the grapevine he was off doing some crazy arse dive in the Red sea...

8th December 2009, 08:06	#1 (permalink)
diverdman RBW Member Join Date: Nov 2008 Location: Melbourne Australia Posts: 55	Loud buzzing noise from 02 bleed orifice Hi All, need some advice: rEvo III, my partners o2 orifice bleed valve is making a buzzing sound - much like a small alarm clock. We have done a number of checks. Flow rate is fine, IP is within range checked on two independant IP gauges. We got the units in September this year done about 20 - 25 hours, religious with cleaning. The noise coming from the orifice is audible from the next room...it is loud...Anyone had this issue? Any ideas on resolve because carrying an alarm clock on a dive is no fun . Cheers Helen Grigg
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8th December 2009, 09:25	#2 (permalink)
paulraymaekers rEvo's daddy rEvo Join Date: May 2005 Location: belgium Posts: 3,641	Re: Loud buzzing noise from 02 bleed orifice Quote: (Originally Posted by diverdman) Hi All, need some advice: rEvo III, my partners o2 orifice bleed valve is making a buzzing sound - much like a small alarm clock. We have done a number of checks. Flow rate is fine, IP is within range checked on two independant IP gauges. We got the units in September this year done about 20 - 25 hours, religious with cleaning. The noise coming from the orifice is audible from the next room...it is loud...Anyone had this issue? Any ideas on resolve because carrying an alarm clock on a dive is no fun . Cheers Helen Grigg best ask the manufacturer directly it is not the orifice, but the non-return valve, that sometimes buzzes due to the very low flow there is a simple fix for that will send it by mail paul __________________ www.rEvo-rebreathers.com ...."Yes you have to pre-breathe to activate the scrubber sorb, anyone who says different doesn't know what they are talking about!"... .... to get more accurate CO2 injection in the breathing machine we put 2 mass flow controllers in series ... .... radial scrubbers give longer dwell time than axials... .... the earth is flat and ...
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8th December 2009, 14:06	#3 (permalink)
safagamarc RBW Member rEvo III, Sentinel, Evo, Inspi Join Date: May 2006 Posts: 210	Re: Loud buzzing noise from 02 bleed orifice Hi Helen, Had the same sort of thing on my unit it was abit of a hummingbird as Paul calls it. It is a real quick fix and Paul will sort it out. Enjoy the diving down under and remember to say "Thank yyou Paul" Greetings, Marc
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8th December 2009, 21:00	#4 (permalink)
Dsix36 anti-hammerhead rEvo Optima Dolphin Join Date: Aug 2007 Location: Deerfield_Beach, Florida Posts: 3,438	Re: Loud buzzing noise from 02 bleed orifice What is the quick fix? Do you replace the one-way valve or is there something else that can be done to repair the valve?
(Online)

8th December 2009, 21:06	#5 (permalink)
NJdiver85 RBW Member Join Date: Apr 2006 Location: Bermuda Posts: 56	Re: Loud buzzing noise from 02 bleed orifice Paul posted the fix a while back, with pictures. Basically, you remove the check valve and blow O2 lube through the inlet. I had to do this once early on with my unit, and then again a few months later. So far so good, but if it returns, I may get a new check valve.
(Offline)

9th December 2009, 08:59	#6 (permalink)
Tybo RBW Member rEvo III hCCR Join Date: Aug 2008 Location: South France (83) Posts: 15	Re: Loud buzzing noise from 02 bleed orifice Just have a look here : http://www.rebreatherworld.com/revo-...e-problem.html every thing is explained ! and with pictures ! A+ Tybo
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9th December 2009, 09:09	#7 (permalink)
diverdman RBW Member Join Date: Nov 2008 Location: Melbourne Australia Posts: 55	Re: Loud buzzing noise from 02 bleed orifice Cheers all - nice to be on a helpful forum site - ...all fixed - alarm clock off..Paul sent on instructions. ..we did do an initial search but had the wrong wording so didn't find posts.. p.s said manufacturer is always extemely helpful and prompt in replying - in this case I hear on the grapevine he was off doing some crazy arse dive in the Red sea...
(Offline)

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