寶德角座閥/氣動角閥2000 A分底座下流向和底座上流向，區別在于過的是氣體還是液體。具體信息描述如下：
寶德角座閥/氣動角閥2000 A流向閥座上技術參數（僅適用于氣體和蒸汽）
介質 氣體和蒸汽
其它技術參數 請參見閥座下流向的資料
注意！ 閥座上流向的閥門只能在一定條件下可用于液體，因為有產生水錘的危險！
可按需提供兩位兩通常開閥，彈簧復位
可按需提供其它壓力范圍、回路功能、閥座上流向、PPS執行機構和附件等
Medium gas and steam
Other technical parameters Please see the information flow under the seat
Attention! Valve seat to only under certain conditions can be used for liquid, because the risk of water hammer.
According to need to offer two two normally open valve, spring return
According to need to provide other pressure range, the circuit function, seat to, PPS actuators and accessories, etc
