... : PTFEValve: SUS304, SUS316, PVC, PTEFValve ball: ZrO2, SUS304, SUS316, CeramicValve seat: Viton, PVC, SUS304, SUS316Tubing: PE, PVCTechnical Parameter ModelFlow (lph)Pressure ... .54075GB-S 3200/3320031441.540Features1.Very high safety of operation. Mechanical actuate diaphragm. Changeable eccentric drive2.Power off seal,no leakage ...