The capped pipe is called a housing vent port. Rotor pockets can sometimes contain a volume of pressured air, which can impede material flow into the airlock inlet, reducing your efficiency. Also, in conveying systems that run at 6 PSI and higher, large releases of air up the return side of the airlock can cause pulsing in the material flow into the conveying line. Using a vent helps solve both of these issues and improves your fill efficiency.
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Where can you use a quick-cleaning rotary valve?
Not working in a sanitary industry like food or pharma? You can still use a rotary airlock valve with quick-cleaning features to minimize downtime.
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