| 摘要 |
PURPOSE: A high and low pressure sealing unit is provided to effectively prevent the leakage of the cooling water between a guide tube and a thimble tube by using a packing unit. CONSTITUTION: A main body(10) stores a guide tube and a thimble tube. A packing unit(20) is inserted between the main body and the thimble tube. A sealing housing(30) is arranged on the top of the packing unit. A low pressure nut(40) is coupled on the top of the main body in order to pressurize the sealing housing. A union coupling(50) is arranged on the top of the sealing housing. The union coupling is made of a union nut and a union socket. A high pressure nut(60) is fixed and coupled in the outer circumference of the main body in order to pressurize the union nut. A lower nut(70) is fixed and coupled in the lower part of the main body. |
