这种阀组将切断、校准和排气三种装置集于一体，结构小巧，减少了易漏接头，该阀组有两个凹形接头，可供压力计，压力传感器或压力开关安装使用，接头罗纹可根据用户需要为PT、PF、NPT、G、ZG、R等，请在订货时注明。

EF-2型二阀组 TWO SERIES VALE

这种阀组将切断、校准和排气三种装置集于一体，结构小巧，减少了易漏接头，该阀组有两个凹形接头，可供压力计，压力传感器或压力开关安装使用，接头罗纹可根据用户需要为PT、PF、NPT、G、ZG、R等，请在订货时注明。

Three kinds devices collection Yu an integral whole , structure this valve being formed with the cut-out , calibration and exhausting have been small and exquisite , have decreased by connection easy to leak, that valve group has two concave types to connect, but provides a manometer, pressure sensor or pressure switch assembles usage , connection thread may be PT , PF , NPT , G , ZG , R etc. according to consumer need, give clear indication of when ordering goods please.

EF-3型二阀组 TWO SERIES VALE

这种阀组将切断、校准和排气三种装置集于一体，结构小巧，减少了易漏接头，该阀组有两个凹形接头，可供压力计，压力传感器或压力开关安装使用，接头罗纹可根据用户需要为PT、PF、NPT、G、ZG、R等，请在订货时注明。

Three kinds devices collection Yu an integral whole , structure this valve being formed with the cut-out , calibration and exhausting have been small and exquisite , have decreased by connection easy to leak, that valve group has two concave types to connect, but provides a manometer, pressure sensor or pressure switch assembles usage , connection thread may be PT , PF , NPT , G , ZG , R etc. according to consumer need, give clear indication of when ordering goods please.