Valve yotulutsa kawiri makamaka imagwiritsa ntchito kusintha kwa ma valve apamwamba ndi apansi pa nthawi zosiyanasiyana kuti nthawi zonse pakhale mbale za valve pakati pa zipangizo zomwe zimatsekedwa kuti mpweya usayende.Ngati ili pansi pa kupanikizika kwabwino, valavu ya pneumatic iwiri-wosanjikiza mpweya ingathandizenso kugwirizanitsa ndi kulimbikitsa kutuluka kwa valavu yowonjezera, kotero kuti chipangizocho chikhoza kusuntha chakudyacho mosalekeza komanso kukhala ndi ntchito yotseka mpweya. kukumana ndi mphamvu ya pneumatic Zofunikira pakutumiza ufa ndi zida za granular.

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