... . Such as (1) the nominal pressure of 31.5MPa, the nominal diameter 20mm, metric threaded connection type ball valve, the model YJZQ ... -J20N (2) Nominal pressure of 31.5MPa, the nominal diameter ... the nut) (4) The nominal pressure of 31.5MPa, nominal diameter 10 mm, connection plate, screw type ball valve, the model YJZQ ...