concrete pump coupling DN 125,DN150, DN100 by casting PM/Schwing/Sany/Zoomlion ... spectacle wear plate, wear ring, s pipe, chrome bushing, swing lever, intermidiate ring etc. 1. Tungsten carbide wear plate and wear ... hardened) , elbow(welding& casting), reducer, rubber seal, pistons,coupling, intermiate ring, swing lever etc We can also make the parts by your ...