https://www.wvf-valve.com/check-valve/swing-check-valve/ductile-iron-ggg50-check-valve.html
Entirely automatic in action
Depending upon pressure and velocity of flow within the line to perform their functions of opening and closing
Swing pattern
Ductile iron GGG50 Body,cast iron is also available
Working pressure:1.0/1.6 MPa
Suitable medium: water, oil and gas