Operators of ocean-going vessels, such as this liquefied natural gas carrier, demand components that are corrosion resistant, strong, and, especially, reliable. Not surprisingly, then, components like the stainless steel explosion-proof proportional valves have found widespread use in such applications.

Hydraulic components on ocean freighters carrying volatile materials must not only stand up to the corrosive effects of salt water, but also pose no risk of starting a fire or explosion. The solution, then, generally calls for explosion-proof valves made of stainless steel.

In the liquefied natural gas carrier shown, stainless steel valves from Atos Spa, Sesto Calende, Italy, typically exceed 800-hrs salt spray testing. This line of discrete (on-off) and proportional stainless steel valves have ISO mounting surface patterns, for compact system design. The valves are also explosion proof and certified to ATEX 94/9/CE II 2G Ex d IIC T6 for zone 1 and 2 and to UL 1203 — Class I Div 1 Groups C & D. Size 06 valves conform to Safety Integrated Level 3 according to IEC 61508.

These valves are especially well suited to the tough demands of offshore equipment — often, for actuating ball valves, butterfly valves, gate valves, and globe valves widely that control flammable fluids and other substances. Standard electrohydraulic components are rated for operation at temperatures down to –20° and are available for operating temperatures down to –40° C.

Intrinsically safe discrete solenoid valves are also used in marine equipment operating near explosive environments. The intrinsically safe feature uses a low-power electrical supply. To limit input current, the valve’s solenoids are powered through certified safety barriers to avoid possible electrical surges or thermal effects that could trigger an explosion. These valves conform to certification according to ATEX 94/9/CE - II 1G Ex IIC T6 for zone 0, 1, and 2.

For more information on Atos stainless steel, explosion proof, and intrinsically safe valves, visit www.atos.com.