Seat discs shall be reversible to extend check valve life 阀座阀瓣应该是双向的，能够延长止回阀寿命。
2.
Either too low a line velocity or too high a velocity can damage valve internals and shorten valve life 管线流速太低或太高都可能损坏阀内件，缩短阀门的使用寿命。
3.
Either too low a line velocity or too high a velocity can damage valve internals and shorten valve life 管路流速太低或太高都可能损坏阀门内部构件，缩短阀门使用寿命。
4.
Installed in tandem with smaller size regulator to improve system performance and extend valve life 用较小通径的调节阀进行串联安装，以改善系统性能，延长阀门的使用寿命。
5.
Two integrally cast lugs on the disc prevent the disc from spinning in service . this exclusive feature helps extend valve life in difficult services by eliminating disc spinning 阀瓣上的两个整体铸造的耳柄防止阀瓣在运行期间出现旋转现象。这个独特的特征通过消除阀瓣在严酷的应用中出现旋转的现象，来帮助延长阀门的使用寿命。
