翻转式阀瓣止回阀
TILTING DISC CHECK VALVES

　　翻转式阀瓣止回阀适用于要求更高的流速和压力的应用环境中。其阀座环焊接在阀体内，这种阀门能够防止湍流造成的损坏，避免被腐蚀的阀座造成的损坏。在安装之前经过全面彻底的清洗，这种阀门的阀座环通过锻造和轧制，形成一个整体，并经过热处理实现所要求的表面硬度。翻转式阀瓣止回阀以其迅速和静音关闭能力而被著称为“无撞击”止回阀。压力等级包括Class 150, 300和600。这种阀门配置双效补偿枢轴(铰链销)，能够减少阀门工作期间阀座与密封之间的磨损。管道流体既可以在阀瓣上方也可以在下方流进阀门，由管道流体所产生的作用实现缓冲关闭。这种美国太平洋阀门的阀体阀盖连接采用机加工外扣和内扣，适用于所有的压力等级。
　　Tilting disc check valves are designed to handle applications requiring higher velocities and pressures. With seat rings welded into the valve bodies, these valves prevent damage due to turbulence and avoid damage from corroded seats. Perfectly cleaned before assembly, the valves’ seat rings are forged or rolled into one piece and heat treated to obtain the required surface hardness. Tilting disc check valves are noted as “non-slam” check valves for their quick and quiet closing capability. Available in Class 150, 300 and 600, these valves feature a double offset pivot (hinge pin) which reduces wear between the seat and seal while the valve is in motion. Line fluid flows both over and under the disc of each valve, cushioning closure by the line fluid itself. The body-cover joints of these Pacific valves are machined male and female fits for all class types.