Marine Type Approvals held for these valves: American Bureau of Shipping, Bureau Veritas, DNV, Germanischer Lloyd, Lloyds Register. Overflow and control valves made of gunmetal with spring made of spring steel with anti-rust protection with flange connections. With EPDM (ethylene propylene diene monomer rubber) seal suitable for water, neutral and non-sticking liquids, compressed air and neutral gases. Set pressure: 0.5 – 10 bar. Ranges of adjustment: 0.5 – 2 bar (not DN65 and larger), 1,5 – 6 bar, 1,5 – 5,5 bar (DN100), 5,5 – 10 bar (not DN65 and larger), Available seals: EPDM, FKM. Also available in Stainless Steel : series 431.