The Stainless Steel Gate Valve has a casting valve body with sufficient strength to meet the requirements of the working environment fluid flow will not be hindered. Elastic Wedge Gate, can automatically adapt to the pipe stress caused by the deformation of the valve body. The welded assembly of the seat ring through sealing welding, which eliminates the leakage channel. The T-shaped disc-stem connection prevents stress applied to the side of the stem, ensuring smooth and smooth operation. The fillers contain preservatives to avoid rust stem. The deep filler letter ensures a longer filler service life. The valve seat environment is over-sealed and welded to eliminate the leakage passage behind the ring and prolong the life of trouble-free operation.