Check valve: Check valve, also known as check valve or check valve, is used to prevent backflow of media in the pipeline. The bottom valve of the water pump suction is also a check valve. The valve of the opening and closing member is opened or closed by the flow of the medium and the force to prevent the back flow of the medium from being called a check valve. Check valves are automatic valves, mainly used on pipes with one-way flow of media, allowing only the media to flow in one direction to prevent accidents. The check valve is divided into structures according to the structure, and can be divided into three types: a lift check valve, a swing check valve and a butterfly check valve. Lift check valves are available in both vertical and horizontal versions. The swing check valve is divided into three types: single-lobed, double-lobed, and multi-lobed. The butterfly check valve is straight-through type, and the above several check valves can be divided into three types: thread connection, flange connection and welding. Implementation standards: Design and manufacture: GB/T12236-89 Structure length: GB/T12221-89, GB/T15188.1-94 Connection form: GB/T9113, JB/T79, HG20592, GB/T1224 Inspection and experiment: JB/T9092-99, GB/T13927-92 Main features and uses 1. Operation transmission mode: swinging swing type automatic opening and closing structure 2. The pin shaft and the valve flap are connected by built-in structure, there is no external leakage point, and the use is reliable. 3, the valve body material is complete, can be applied to a variety of pressure, temperature and media conditions 4. The valve rotates around the pin shaft outside the valve seat to reduce the leakage point and is reliable to use. Dental Equipment & Supplies,Dental Equipment,Dental Supplies,High Speed Handpiece Gd-H501,Dental X-Ray Unit NOUVASANT GROUP LTD. , https://www.nouvasant.com