Low -leakage high -sealing valve

The utility model discloses a low -leakage high -sealing valve, which comprises the following components: a valve body, the second opening part of valve body sets up the joint, the joint cavity that is the T type has in the joint, respectively for transversely connecting cavity and vertical joint cavity, vertical joint cavity department sets up and is the seal T type, that made by rubber materials, the seal has the column piece that is located vertical joint cavity and is located the disk -like parts of vertical joint cavity one end opening part, the internal screw thread connecting hole is taken to the tip setting of column piece, the key that the setting of vertical joint cavity other end opening part was made by rubber materials, the key has the tightening latch and the bolt nut of outband screw thread, the key passes through the tightening latch and is connected with the connecting hole of seal to the vertical joint cavity of shutoff. The utility model discloses simple structure, convenient to use, exit s