Hydraulic cylinders used on shipboard machinery or used in shipyards must endure very difficult conditions including hot and cold temperature extremes, exposure to salt water, driving rain, ice, as well as dirt and many other forms of contamination. That is an extremely abusive environment for hydraulic actuators. Cylinders used in the conditions must be designed and manufactured with these well in mind if they are to survive and work reliably. In addition, many hydraulic cylinders used on ships and harbor cranes are very large bore and very long stroke. Their large size makes frequent repair or replacement simply out of the question. Other marine cylinders are mounted in a ship's machinery that is very difficult to reach. All these factors makes reliability a primary concern for marine cylinders.
Hyco has a great deal of experience in building marine grade hydraulic cylinders that thrive under those trying conditions. Hyco marine grade cylinders are constructed with chrome plated rods that are rated to withstand a 200-1000 hour salt spray test. Marine cylinder bodies are coated with epoxy paint to maximize corrosion resistance. For more difficult applications, Hyco can build marine cylinders with stainless steel piston rods for additional corrosion resistance. For maximum corrosion protection, we can even manufacture cylinders with all stainless steel construction. We have built both standard rod cylinders and multistage telescopic cylinders for marine use. Harbor crane applications including luffing cranes, container loaders, swing cylinders, and more. Shipboard applications include shipboard luffer cranes, hatch cover cylinders, ramp cylinders, gate cylinders, steering actuators, and more.
The Hyco large bore, long stroke rod cylinder shown above operates as a Shipboard Crane Cylinder.
The Hyco marine cylinders shown above are coated with white epoxy paint to resist corrosion. This will ensure a long trouble free service life under harsh marine conditions. These particular actuators operate as Gate Cylinders. | 
