Our company's rubber sealing ring products are strictly produced in accordance with international standards ISO4633 and national GB/T21873-2008. The products include T-shaped and K-shaped sealing rings for ductile Cast iron pipe. N1 and X types are used for gas pipelines. O-type, rolling type, and sliding type rubber rings are used for cement pipes. PVC pipe rubber ring, specification DN63 -- DN2000, the product has acid and alkali resistance, corrosion resistance, aging resistance, oil immersion resistance and other properties.