在需要关注潜在应力，或需要强度更高的材料时，可以考虑用球墨铸铁替代标准125磅级铸铁。这些情况包括由于系统的原因或外力的作用，如寒冷气候、地震等，导致管道出现不正常的运动等情况。
　　Ductile Iron can substitute for standard Class 125 cast iron where there may be concerns with
potential stresses and a stronger material is desired, i.e. in situations of unusual pipe movement
due to the system or external forces, such as cold weather, earthquakes, etc.
　　可以替代250磅级铸铁应用于150磅级法兰高达285 psi wwp.的中间压力应用领域。(将节省阀门和法兰的成本。)
　　Can substitute for Class 250 cast iron for intermediate pressure services using Class 150 flanges up to 285 psi wwp. (Should save on valve and flange costs.)
　　球墨铸铁是一般应用、消防防火和高升应用的理想选择。
　　Ductile Iron is a good choice for general service, fire protection and Hi-rise applications.
　　比特氟隆阀座法兰球阀还高的应用温度。
　　Has a higher application temperature than Teflon® seated flanged ball valves.