Pneumatic Diaphragm Pump 1.Certifications: ATEX, CSA, UL, CE, USDA, FDA 2.Non-Metallic Materials: Polypropylene, PVDF Pneumatic Diaphragm ... -Metallic Materials: Polypropylene, PVDF, Nylon and Conductive AcetalCertifications: ATEX, CSA, UL, CE, USDA, FDA Technical parameter working principle LH Type Pneumatic diaphragm ...