740E 高性能低温铝蝶阀的阀板与阀座具有独特的结构设计，因此具有优良的切断性能和耐久性能，是一种用途广泛的调节阀。

This series is high performance cryogenic aluminum butterfly valve of high durability, high seating performance. It has several different seal ring construction suitable to various service applications.