Valve yotulutsa kawiri makamaka imagwiritsa ntchito kusintha kwa ma valve apamwamba ndi otsika nthawi zosiyanasiyana kuti nthawi zonse pakhale mbale za valve pakati pa zipangizo zomwe zili mumkhalidwe wotsekedwa kuti mpweya usayende. Ngati ili pansi pa kukakamizidwa kwabwino, valavu ya pneumatic iwiri-wosanjikiza mpweya ingathandizenso kugwirizanitsa ndi kulimbikitsa kutuluka kwa valavu yowonjezera, kotero kuti chipangizocho chikhoza kutulutsa chakudyacho mosalekeza komanso kukhala ndi ntchito ya loko ya mpweya kuti igwirizane ndi mphamvu ya pneumatic Zofunikira popereka ufa ndi zipangizo za granular.

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