concrete pump coupling DN 125,DN150, DN100 by casting PM/Schwing/Sany/Zoomlion We, Zhuzhou Jian Da Co.,Ltd , locatd in China Carbide Base, are specialized in manufacturing concrete pump wear parts for concrete pumps, including Sany, Zoomlion, Putzmeister,Schwing, Kyokuto, Cifa, Sermac, Niigata, Mitsubishi, IHI etc. Our products are mainly include but not limit to spectacle wear plate, wear ring, ...