CPA SERIES TO GENERANT SERIES ACVDescription The DCV Series’ unique Floating Acetal Copolymer Disc design allows for a positive bubble tight seal with as low as one inch of water crack pressure. Rated for service up to 500 Psig, the DCV Series is available with many standard elastomer seal options, making it a versatile choice for many low pressure applications. DCV Series valves can be ordered cleaned for Oxygen service.