RV-SRV gravity weighted safety relief valve

RV-SRV gravity weighted safety relief valve

Equilibar RV-SRV for use in ventilator designs

The RV-SRV is a gravity weighted safety relief valve concept under development. Prototypes of these valves are being evaluated in Equilibar’s lab and at various federal labs. As development proceeds and if a final design is released, Equilibar plans to have these valves available in volume to potentially help with the shortage of relief valves due to the COVID-19 pandemic.

Equilibar requires that all RV-22 or RV-19 valves be used with a relief valve, so we are proceeding with development of this design in case relief valves are in short supply.

Please contact us with questions or comments at inquiry@equilibar.com

Current Prototype Specifications*

  • Buna, HDPE, SS
  • Pressure relief at 1 psi (70 cm H2O / 28 in H2O)
  • Ports: 22 mm


The video below shows an early prototype RV-SRV valve in use relieving to 55 mbar at about 55 lpm air flow


RV-SRV gravity weighted safety relief valve cut-view

cut view of RV-SRV

photo of RV-SRV valve

image of RV-SRV with bracket

*Equilibar control valves have historically not been for use in commercial ventilator systems. In connection with the COVID-19 pandemic, Equilibar has retrofitted its valves for potential use in connection with medical ventilator systems. While our valves are not approved for any medical use by the FDA or any other governmental agency, Equilibar plans to produce these valves in volume and offer the valves, with affordability in mind to the extent possible, to businesses or governments who are actively seeking or agree to seek qualifying approval for the sale or distribution of integrated systems for use within a medical setting from the U.S. Food & Drug Administration (“FDA”) or other similar governing agency in local jurisdiction. Your agreement to any terms of sale with respect to our valves asserts that you are a technically competent entity capable of evaluating system risk and seeking Emergency Use Authorization from the FDA or other similar governing agency in local jurisdiction.

All rights to use our valves shall be effective from the date we provide the valves to you until such time as we notify you that your use must end which reasons may include, without limitation, end of the existing pandemic or recalls for safety reasons.

Use of our valves and/or drawings shall be solely as provided for in a legal agreement with you which will include, in part that any sale is (i) not and does not represent medical or legal advice by Equilibar, (ii) is not approved or available as alternative to an FDA approved ventilator and (ii) AS IS, WHERE IS, AND WITH ALL FAULTS’’. If you do not agree with any of the foregoing do not purchase or use any of our valves for use other than as originally intended (i.e. commercial ventilator systems).

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