in-line/cross-line 是什么意思 (still about actuator ...? For "FAIL-CLOSED" cross-line operation with 05-20 sizes, invert actuator and cross-line mount actuator to pipe line. For "FAIL-OPEN" in-line operation with 05-20 sizes, invert actuator(NOTE: if in-line coupling is used, actuator does not need to be inverted).Rotate the valve ball and stem 90 degree, so coupling lines up with actuator shaft. 直线-交叉线? [ ]查看更多7个回答 . 2人已关注