Product Name: Micro Resistance Slow Closing Check Valve
Body Material: DI QT450
Size: DN100, 4 Inch
Pressure: PN16, Class 150 LB
End Connection: Flanged
Product Range
Size Range: DN50-DN800, 2-32 Inch
Pressure Range: PN16-PN150, Class 150-900 LB
Body Material: Ductile Iron
Suitable Medium: Clear water, sewage, seawater, etc.
Applicable Temperature: ≤120°C


Source: https://www.magpievalves.com/micro-resistance-slow-closing-check-valve-qt450-dn100-pn16.html