ZBF22D a butterfly-type self-maintaining, self-sustaining butterfly outline ZBF22D type is mainly made up of body and drive mechanism composed of a self-sustaining two two-way valve, either manually, but also electric. After receiving the open (off) valve signal, the drive mechanism driven butterfly valve is energized to rotate the spool to the internal drive mechanism bit self power, mechanical valve position indication pointing to the appropriate valve position, the valve position switch output passive valve signal. Each spool rotation 90 °, valve function switch once. Second, the technical parameters of the working medium: oil, water Rated pressure: 0 ~ 1.6MPa Medium temperature: ≤150 ℃ ambient temperature: 0 ~ 45 ℃ Relative humidity: ≤95% RH Power supply voltage: AC / DC220V DC24V DC / AC110V action time: 15S 30S 60S 90S Connection: threaded connection, can be equipped with card sets of pipe joints