Strainer bottom valve bottom valve strainer valve Material:PVC, SUS304, SUS316, PTFE Caliber:DN10, DN15, DN25, DN32, DN40 Strainer bottom valvebottom valveStrainer valveMaterial:PVC, SUS304, SUS316, PTFECaliber:DN10, DN15, DN25, DN32, DN40 strainer bottom valves