YJZQ type high-pressure ball valve I. Model Description An internal the ... the nominal diameter 20mm, metric threaded connection type ball valve, the model YJZQ-J20N (2) Nominal pressure of ... 31.5MPa, the nominal diameter 15mm, the ball valve within the interface inch pipe thread, the model ... external threaded connection with the takeover and nut ball valve, the model YJZQ-J32W (with take over the ...