concrete pump S valve 1. Welding type 2. Casting ... China Carbide City, are specialized in manufacturing concrete pump wear parts for concrete pumps, including Sany, Zoomlion ... , Niigata etc 2. S pipe and related S valve partsFitting to Sany, Zoomlion, Kyokuto, Putzmeister, Waitzinger etc ... 3. other concrete pump spare parts: delivery Pipe(both normal and hardened) ...