... (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 ... pressure of 31.5MPa, nominal diameter 10 mm, connection plate, screw type ball valve, the model YJZQ-J10B (with screws) YJZQ type high-pressure ball valve ...