【Widely Used】Our threaded check valves are suitable for the transportation of water, steam, oil, nitric acid, urea and other media 【Principle of Operation】The Non Return connectors are respectively for tube connecting, mainly used for the one-way of the medium in the pipeline, which only allows the medium to in to prevent the medium from backflow 【Application】The check valve is used in fluid system to prevent reverse fluid, or used in pneumatic system to prevent reverse of compressed air 【Features】The ports of this check valve are carefully designed with Precision internal threads, which is easier to install, more compact and more 【High Quality Material】Our check valve is made of Brass, which is strong and durable, not easy to corrode, high compressive strength and long service life, Manufacturer: Oumefar