Ductile iron hard-back wafer butterfly valve, manual operation, the connection is multi-standard, be connected to PN10, PN16, Class150, Jis5K/10K, uye mamwe mazinga epipeline flange, zvichiita kuti chigadzirwa ichi chishandiswe zvakanyanya munyika.Inonyanya kushandiswa mumadiridziro, kurapwa kwemvura, mvura yemumaguta uye mamwe mapurojekiti.