For Low Temperature: While the seat materials selected for use in Crane butterfly valves are capable of withstanding lower temperatures without damage, the durometer of the elastomer is changed.

• 对于低温环境：虽然美国克雷恩蝶阀所采用的阀座材料在低温环境下不会损坏，但是弹性材料的硬度却会有所改变。