Product Description Fitting types include Metric screw thread ,British screw thread ,Uniform screw thread, and NPT screw thread etc. Types of airtight include direct, platform, spherical, incline and tenon-groove airtight. Product Feature Features: Being simple-structured, easy-operated, this style coupling can be quickly connected and easily separated just by turning out the handle and then twist the coupling. It is applicable to applications with bigger nominal diameter and low pressure. Nominal Diameter: DN25-100 Material option: Carbon steel, Stainless steel, Copper etc. Working temperature (°C):/Hermetic material -40～+100 / buna -20～+180 / FL-rubber -40～+250 / polyethylene Special product can be manufactured according to client specific requirements. Product Specification/Models R,Rc,G,NPT,DIN.etc.