Seal is suitable for the tight sealing of flat flange vessels with annular groove.– Accessories for flat flange vessels, comprising an elastic, silicone core with seamless FEP coating that encloses the ring – The combination of these high-quality materials achieves good elasticity in conjunction with outstanding chemical resistance – – – Seal is suitable for the tight sealing of flat flange vessels with annular groove.– Accessories for flat flange vessels, comprising an elastic, silicone core with seamless FEP coating that encloses the ring – The combination of these high-quality materials achieves good elasticity in conjunction with outstanding chemical resistance – – –