[PSUBS-MAILIST] regulator for compensating

[via Personal_Submersibles]

Hank, for breathing the second stage needs a high capacity. For compensating just a few percent of it. 

 

BR, Emile

 

Van: Personal_Submersibles <personal_submersibles-bounces at psubs.org> Namens hank pronk via Personal_Submersibles
Verzonden: vrijdag 15 januari 2021 13:14
Aan: via Personal_Submersibles <personal_submersibles at psubs.org>
Onderwerp: Re: [PSUBS-MAILIST] regulator for compensating

 

Emile, thank you, I did some testing yesterday with the regulator in a pail of water and connected to the arm actuators.  I removed the vent plug from the actuator to see how much air flows through the actuator.  Only a very small amount of air comes out the vent port before the regulator free flows.  I think that is due to the length of the small air lines to the actuators, plus there are wires in the hoses.  I then put extension tubes on the regulator vent ports and tried it.  There is a significant improvement in air flow coming out of the actuator vent port.  

The question is, do I need the increased air flow? given the amount of things being compensated.

Hank

 

On Thursday, January 14, 2021, 11:21:55 PM MST, via Personal_Submersibles <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> > wrote: 

 

 

Hank,

 

The lenght should be not a problem.You can create a small overpressure by placing the second stage as low as possible. Any water or condensation will be expelled during ascending as another advantage. Flow restriction sounds ok. 

 

Br,Emile

 

Van: Personal_Submersibles <personal_submersibles-bounces at psubs.org <mailto:personal_submersibles-bounces at psubs.org> > Namens hank pronk via Personal_Submersibles
Verzonden: donderdag 14 januari 2021 21:16
Aan: Personal Submersibles General Discussion <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> >
Onderwerp: [PSUBS-MAILIST] regulator for compensating

 

HI All, I have been playing around with and installing a first and second stage regulator on my ROV to compensate the arm etc.  Alan has raised a very valid concern.  The pressure differential between intake and exhaust is very slight and make me think the air may not make it to the arm motors.  Alan has suggested extending the exhaust ports to create more back pressure.  I was also thinking about restricting the volume allowed to exhaust, so if it free flows the restriction will help close the exhaust valve.  

Any thoughts on the matter?

Hank

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