詳細資料Details：

氣動球閥開關輕便，體積小，可以做成很大口徑，密封可靠，結構 簡單，維修方便，密封面與球面常在閉合狀態，不易被介質沖蝕，在各行業得到廣泛的應用。

Pneumatic valve switch light, small size, can be made large caliber, reliable sealing, simple structure, easy maintenance, with the spherical sealing surface often in the closed state, the media can not easily be eroded in the industry that is widely used.

 主要外形和連接尺寸單位Main external and connecting dimensions（mm）：

注：上明牌，“LL’型氣動四通換向球閥組成，是一種旋轉類切斷調節閥門，具有關閉嚴密，結構緊湊，重量輕，維修方便等優點。廣泛用于氣體、液體、蒸汽、油品等腐蝕性介質的管道自動化控制中。

Note: The winning numbers, "LL 'pneumatic four-way reversing valve component is a rotary type cutting off regulating valves, has closed tight, compact, light weight, easy maintenance etc. are widely used in gas, liquid , steam, oil and other corrosive media pipeline automation control.