... tested easy installation,maintenance excellent flow characteristic best price Ozone Resistance check valveSCV014DVLproduct detail:body material: PVDFdiaphragm material: ... Four diaphragm materials. fluorosilicone, Viton, silicone and EPDMFunction:1.Prevents damage to equipment, pumps, and flow systems by ... bag and wrapped, cased in small carton 1/4"PVDF VITON Ozone Resistance barbed plastic check valve