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Published 20 hours ago • verified publisher icon RespiraWorks

Selection: oxygen control valve

Open inceptionev opened this issue 5 years ago • 3 comments
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New Oxygen Valve must:

  • Be Oxygen safe
  • Support highest PIP requirements at max flow rate
  • Have good control margin

inceptionev avatar Jun 25 '20 21:06 inceptionev

I assume this is the oxygen control valve? I think the big thing we were short on here was max flow rate design. As discussed with @martukas and @sosaysthecaptain we wanted to try a pinch valve style oxygen regulator.

One suggestion, in addition to moving to much smaller tubing, was to change the current pinch valve to improve oxygen response was to add an arced, rather than flat pinch plate, giving a bit more angular resolution to the orifice size.

The other option is to find a higher CV proportional solenoid.

esc-works avatar Jun 29 '20 20:06 esc-works

The SMC PVQ31-6G-40-01 proved to be capable of the 60 lpm required to pass the CoVent tests. The data for that test is here: https://github.com/RespiraWorks/Ventilator/tree/master/software/sample-data/2020-06-21-Peak-Oxygen-Flow

We are now also testing the UFlow IBV19M for the Indian market. That test data is here: https://github.com/RespiraWorks/Ventilator/tree/master/software/sample-data/2020-07-31-UFlow-Performance

inceptionev avatar Aug 07 '20 07:08 inceptionev

Related ticket #922

martukas avatar Jan 27 '21 01:01 martukas