Principle: n-gun jaw ai shaloi, electromagnetic coil gaw valve dung shara kaw na hpaw ai daw hpe sharawt na matu electromagnetic n-gun hpe shapraw ya nna, valve hpe hpaw dat ai; Power, electromagnetic n-gun n nga mat ai, dung shara ntsa na n-gun hpe pat na matu spring, valve hpe pat da ai. Features: vacuum hta, n kaja ai n-gun, zero pressure gaw normal hku bungli galaw lu ai, raitim diameter gaw 25mm hta n jan ai.
