Stainless steel cartridges from Sun are suitable for use in harsh environments such as marine, offshore and washdown applications. External parts are made of stainless steel, with adjustment screws, where needed, of grade 5 titanium. All corrosion-resistant valves have been qualified by a 1000 h salt spray test to ASTM B117-03. All corrosion-resistant valves feature Sun's floating style cartridge construction, which eliminates potential cartridge binding and minimises torque sensitivity. The valve performance and external dimensions will be the same as Sun's standard products.
All valves fit existing Sun cavities and are rated to 350 bar working pressure at all ports. Internal working components are heat treated and made from carbon and alloy steels.
Sun also manufactures a Tri-Grip Handknob Kit with plastic and stainless steel parts that has equivalent corrosion protection. This handknob is only available as a kit and is used with all Series 1, 2, 3 and 4 valves with the L adjustment.
Manifolds, either catalogued or custom, are available in 6061 aluminium or specially-ordered in anodised aluminium, nickel-plated ductile iron or stainless steel. It should be noted that zinc-plated manifolds should not be used with the corrosion-resistant cartridges.