stephenws
Skin Diver
Posts: 46
Joined: Wed Feb 05, 2014 8:45 pm
First Name: Stephen
Location: Davenport IA

Scubapro B/A Purge Issue

Sun Apr 06, 2014 10:48 am

I recently purchased a NOS Scubapro Balanced Adjustable 156 second stage. It breathes fine, but the purge is not operating properly. When the purge is fully depressed, the regulator "locks" into a very strong free flow until the mouthpiece is covered and the internal pressure equalizes. I have another Balanced Adjustable whose purge functions normally - push it in and you get a moderate flow until the purge is released and the flow stops. The newly acquired B/A has a way too forceful flow. Intermediate pressure off the Apeks first stage is 135psi.

Any idea what could be causing this purge problem?

I don't have a Scubapro dealer anywhere nearby and am about to send it off somewhere - does anyone know of a really good Scubapro repair facility? I'm located Davenport, Iowa.

Thanks,
Steve

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luis
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Joined: Thu Jun 30, 2005 9:28 pm
First Name: Luis
Location: Maine

Re: Scubapro B/A Purge Issue

Sun Apr 06, 2014 11:06 am

The better or finely tuned Scubapro 109 will behave like that. I try to tuned them so that they are that sensitive.

If you need to de-tune to use it as an octo, just turn in the diver adjustable knob.
Luis

Buceador con escafandra autónoma clásica.

stephenws
Skin Diver
Posts: 46
Joined: Wed Feb 05, 2014 8:45 pm
First Name: Stephen
Location: Davenport IA

Re: Scubapro B/A Purge Issue

Sun Apr 06, 2014 11:23 am

Thanks Luis.
This new B/A has a plastic ring installed on the adjustment knob shaft that limits the de-tuning of the reg. My older B/A doesn't have this ring. The plastic ring is split on one side and at first I thought it was some kind of shipping "restraint", but I wasn't sure, so have left it on. Have you ever seen this plastic split-ring before?

stephenws
Skin Diver
Posts: 46
Joined: Wed Feb 05, 2014 8:45 pm
First Name: Stephen
Location: Davenport IA

Re: Scubapro B/A Purge Issue

Sun Apr 06, 2014 12:52 pm

Ok, I removed the plastic split-ring (which was a son-of-a -gun to get off), and now I can de-tune enough to get rid of the purge free flow.

Thanks again Luis.

jim66
New Member
Posts: 5
Joined: Fri Feb 10, 2012 1:29 pm
First Name: Jim
Location: Dallas TX

Re: Scubapro B/A Purge Issue

Sun Apr 06, 2014 6:25 pm

I find that the lever height will do this. Adjust the orifice a hair.

vintagefrank
Skin Diver
Posts: 34
Joined: Mon Jun 23, 2014 9:13 am
First Name: Frank
Location: Germany

Re: Scubapro B/A Purge Issue

Tue Jul 29, 2014 5:06 pm

This plastic ring was introduced to get better work of breathing (needed for certification). WOB would be too high if fully turned in....

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