... Suit medium: cold water, hot water, compressed air, gas, oil etcSealing ring material:Option 1. CIIR(Chlorinated butyl rubber): Sanitary ... (Ethylene-Propylene-Diene Monomer) : Sanitary for human consumer, not oil-resistant. Suitable for drinking water, tap water, hot and cold ... not sanitary but poisonous. It is suitable for fuel gas, fuel oil and oil. But NEVER use it for human consumption or animal ...