Ductile iron wafer butterfly valve, khokahano ke ea maemo a mangata, e hokahane le PN10, PN16, Class150, Jis5K/10K, le litekanyetso tse ling tsa flange ea lipeipi, e etsang hore sehlahisoa sena se sebelisoe haholo lefatšeng.e loketse merero e meng e tloaelehileng e kang ho hloekisa metsi, ho hloekisa likhoerekhoere, mocheso o chesang le o batang oa moea, joalo-joalo.