A.3.2~7.0KPa B.0~3.2KPa C.3.2~7.0MPa D.0~3.2MPa
A.公稱直徑DN100mm,公稱壓力4.0MPa B.公稱直徑DN100mm,公稱壓力40MPa C.公稱直徑DN100cm,公稱壓力4.0MPa D.公稱直徑DN100mm,公稱壓力40KPa
A.1.9~4.0 B.4.0~1.0 C.10~20 D.20以上