⊙标准应用 Standards compliance                                                                            

·设计标准Design and Manufacture: AP1599,API 6D

·结构长度Face to face(end to end): ANSI B 16.10

·连接法兰Flanged connection: ANSI B 16.5

·对焊端Butt welded end: ANSI B 16.25

·试验和检验Test and inspection: A尸16D

   

⊙主要结构特点 Main structural features                                                                                                             

栓接阀盖，提升式旋塞设计，它的密封性是通过阀片四周的 密封圈来实现的。独特的燕尾槽保护和固定密封圈。双向流动，安装使用更方便。

Bolt bonnet OS&Y lifting一round plug, Its sealing is realized by the sealing rings around the valve disc. It has unique protection of swallow tailed sink and fixed sealing rings. Double direction.

⊙工作原理 Principle of opening and closing of the valve                                                                     

当阀门全开的状态下，塞子的通道兴阀体的通道对齐，能保证理想的最低压力降.当转动手轮，塞片转动9。度，当继续转动手轮，塞子将会下压，使阀门向两侧张开，阀片将紧紧的压在阀座上，使阀门关闭;当手轮向反方向转动时，首先使塞子向上运动.使阀片于阀座脱离，继续转动手轮，使塞子带动阀片90度最后塞子的通道于阀体的通道对齐，使阀门处于全开的状态。

When the valve is fully opened, the channel of plug is in alignment with the channel of valve body, which can ensure ideal and lowest desc rea seon pressure, When the hand wheel is turned, the plug will rotate toward the closing direction, and make the same time draft the rotation of valve seat will he Se- parated; if the hand wheel is turned inversely, first of all the plug will move upward, and the valve disc is turned by 90 degree driven by the plug, and finally the channel of plug will be in alignment with the channel of valve body, so that valve is be fully opened.