... water treament filtration media, heat resistance. 3.ISO9001 Plastic Conjugate rings available material:PE, PP,RPP, PVC, CPVC, PVDFZhongying' ... s plastic conjugate rings advantage:1. heat resistant and chemical corrosion resistant plastics 2 ... gas industry and environmental protection, etc Zhonying Plastic Conjugate rings Technical Data: D*H*TmmSurface area (m²/m³)Free ...