Bolt Clamp Coupling is a concrete pump spare part,it is used to connect and fasten concrete pump pipelines and rubber hoses.it is always used together with the rubber gasket. Rubber gasket also called rubber seals,or rubber O rings. Serving brand include Schwing, Putzmeister, CIFA, Sany,Zoomlion….etc. It works together with rubber gasket(seals) in pipe connection. Specifications:  concrete pump pipe