We produced all kinds of hydraulic valves and quick couplings from 2004, owned 21000m2 workshops together with brass valves, all products meet ISO standard, can be interchangable with all the world famous producer. our quality is excellent, can compare with all famous world producers, including connecting with pressure and with pressure eliminator couplings. Mostly doing OEM ordes for all the world customers, about, Industrial Coupling, Prefabricated Buildings ...