concrete pump coupling DN 125,DN150, DN100 by casting PM/Schwing ... locatd in China Carbide Base, are specialized in manufacturing concrete pump wear parts for concrete pumps, including Sany, Zoomlion, Putzmeister,Schwing, Kyokuto, ... to Sany, Zoomlion, Kyokuto, Putzmeister, Waitzinger etc 3. other concrete pump spare parts: delivery Pipe(both normal and hardened) , elbow(welding& casting), reducer, ...