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Accessible at any timeA low temperature stop valve, Unlike Example 1, Comprises a valve body 1 and a valve cover 2, A valve stem 3 is arrange in that valve body 1, One end of the valve stem 3 is provided with a valve disc 4, The other end of the valve stem 3 is provided with an adjusting handwheel 5, A low portion of that disc 4 is provided with a guide sleeve 6, The guide sleeve 6 is fixed by means of a connecting piece and a spring pad 8, Between that disc 4 and the guide sleeve 6 is provide a valve seat 7, Between that valve stem 3 and the valve cov 2 there is provided a packing assembly 9, An O-ring 10 is further dispose at that upper portion of the packing assembly 9, An upper part of that O-ring 10 is provide with a packing gland 11, The valve body 1 is provided with an arc-shaped end face 12, the arc-shaped end face 12 forms a line seal between the valve body 1 and the valve seat 7, the contact end of the valve disc 4 and the valve seat 7 is provided with a water grain surface 41, the packing assembly 9 comprises a flexible graphite packing layer, the valve body 1 is provided with a liquid inlet cavity and a liquid outlet cavity, the two O-rings 10 are concentric arranged, and the inner diameter and outer diameter of the two O-rings are different.如今人家调兵遣将，把孔雀城驻防的军队都拉来了，要跟咱们拼命啦。揭秘泰国基友名媛们的日常！突袭朋友公寓，发现两个韩国帅哥在床，他们到底在干嘛呢？《蓝血》很快就会重播新的剧集The rest of Song Guochun (in the sea, close to each other) kept pleading, but Liu Guiduo did not speak and we did not dare to save him. Liu Guiduo said, 'Take it up'. Huang Jinbo and I pulled him up. I saw his head bleeding and found a paper towel to wipe him.