Penglai Huande Steel Valve CO.,LTD can provide you with precision casting stainless steel ball valve. Here is our 3 pieces internal threaded reduce bore valve. Please allow me to introduce the installation and structure of our products for you. Installation and maintenance of 2 Piece Reduced Bore Internal Threaded Ball Valve: The installation and maintenance of three-piece internal thread reduce bore ball valve should pay attention to the following matters: 1. Leave the valve stem in a rotated position. 2. Cannot be used for throttling. 3. The ball valve with transmission shall be installed upright. Structural features of 2 Piece Reduced Bore Internal Threaded Ball Valve: 1. open and close without friction. This function completely solves the problem that the traditional valve affects the seal due to the mutual friction between the sealing surfaces. 2. Top-mounted structure. The valve installed on the pipeline can be directly checked and maintained online, which can effectively reduce the parking of the equipment and reduce the cost. 3. Sealing surface self-cleaning structure. When the ball is tilted away from the valve seat, the fluid in the pipeline passes through 360° along the sealing surface of the ball, which not only eliminates the erosion of the valve seat by high-speed fluid, but also removes the accumulated material on the sealing surface to achieve the purpose of self-cleaning.