Common cylinder operation chu pneumatic valve hmanga control a ni a, a tawp danga cylinder intake leh exhaust tawp khat control turin pneumatic valve hawn a ngai a nih chuan, pneumatic valve khar a ngaihna chuan original intake end exhaust tawp dang chu a control ang a, chuvangin action tin hian exhaust sound a nei vek ang. Pneumatic valve pawh hi spring return a ni a, intake tawp khat chauh a ni a, valve hawn a ni a, closed only closed air exhaust as side of the spring chu khar a ni. He valve hnathawh hi secondary exhaust sound pakhat a ni.
