Disc Disc check valve - CHECKO D | ARI Disc check valve - CHECKO D | ARI The Disc Check Valve - CHECKO D by ARI is a versatile valve designed for use in various demanding applications. It is suitable for recycling facilities, the chemical industry, hospital technology, and process water installations, particularly those dealing with aggressive media. The valve is engineered to handle process water and other aggressive... View Flanged (Wafer) PN 40 DIN 1.4408