Buna lid vents

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masic2000

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Does anyone know how these Buna pressure release vents work? Can they be used instead of air locks on juice buckets? See pics below,

20200915_152916.jpg20200915_152907.jpg20200915_151931.jpg
 
Testing these bucket lids to perform an EM. They have a pressure release between .1 and .2 PSI. I can barely feel the C02 being released under pressure while completing the primary fermentation with skins.
 

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