Seatrax Inc. Offshore Cranes Hydraulic System Types

All technical papers are available in PDF and compressed formats (Recommended for Mac/Safari users).

back to top

Seatrax High-Pressure Filtration Package

Seatrax has developed a high-pressure filter package available for cranes equipped with variable or fixed displacement hydraulic systems.

Compatible with the existing hydraulic filtration system.

Provides a separate filter for the main/auxiliary, boom and slew pumps.

Installation requires only common hand tools.

...more

back to top

Main Return Line Filter Package

Seatrax has incorporated a low-pressure, large main return line filter as a standard component on all cranes. This filter package is available as an after-market retrofit kit for older Seatrax cranes equipped with the smaller dual filters on the return lines...more.

back to top

Closed vs. Open Loop Safety Considerations

High pressure, variable displacement piston hydraulic systems provide the best performance, efficiency and component life for use in high duty cycle offshore cranes. Piston hydraulic circuits are available in two configurations, closed circuit and open circuit. The following information details the safety and ramifications of closed and open circuit hydraulic systems as applied to hoisting and slewing operations of offshore cranes...more.

>

back to top

Seatrax Hydraulic Options

Three standard hydraulic options are available to power Seatrax marine cranes:

High flow, high pressure, variable displacement piston pumps

Medium flow, high pressure, variable displacement piston pumps

Medium flow, medium pressure, fixed displacement external gear pumps...more.

back to top

Seatrax Electro-Hydraulic Cranes Prime Mover Packages

The Seatrax Electro-Hydraulic Prime Mover Packages are equipped with high pressure, variable displacement hydraulic systems. The standard electric motor sizes are 250 HP, 300 HP, 400 HP, 500 HP, 600 HP and 800 HP (dual motors are also available). Seatrax cranes with electro-hydraulic prime movers are operating in a wide variety of offshore environments including the North Sea, Gulf of Mexico, South America, Southeast Asia and Nova Scotia...more.

back to top

Fixed vs. Variable Displacement Hydraulic Systems

An offshore crane mounted on a fixed structure typically operates for 150-300 hours per year, and a crane used to support drilling operations typically accumulates 3,000-5,000 hours per year. The fixed displacement gear type hydraulic system works well for many years on fixed platform applications given the low cumulative hours...more.

All technical papers are available in PDF and compressed formats (Recommended for Mac/Safari users).
back to top	Seatrax High-Pressure Filtration Package Seatrax has developed a high-pressure filter package available for cranes equipped with variable or fixed displacement hydraulic systems. Compatible with the existing hydraulic filtration system. Provides a separate filter for the main/auxiliary, boom and slew pumps. Installation requires only common hand tools. ...more
back to top	Main Return Line Filter Package Seatrax has incorporated a low-pressure, large main return line filter as a standard component on all cranes. This filter package is available as an after-market retrofit kit for older Seatrax cranes equipped with the smaller dual filters on the return lines...more.
back to top	Closed vs. Open Loop Safety Considerations High pressure, variable displacement piston hydraulic systems provide the best performance, efficiency and component life for use in high duty cycle offshore cranes. Piston hydraulic circuits are available in two configurations, closed circuit and open circuit. The following information details the safety and ramifications of closed and open circuit hydraulic systems as applied to hoisting and slewing operations of offshore cranes...more. >
back to top	Seatrax Hydraulic Options Three standard hydraulic options are available to power Seatrax marine cranes: High flow, high pressure, variable displacement piston pumps Medium flow, high pressure, variable displacement piston pumps Medium flow, medium pressure, fixed displacement external gear pumps...more.
back to top	Seatrax Electro-Hydraulic Cranes Prime Mover Packages The Seatrax Electro-Hydraulic Prime Mover Packages are equipped with high pressure, variable displacement hydraulic systems. The standard electric motor sizes are 250 HP, 300 HP, 400 HP, 500 HP, 600 HP and 800 HP (dual motors are also available). Seatrax cranes with electro-hydraulic prime movers are operating in a wide variety of offshore environments including the North Sea, Gulf of Mexico, South America, Southeast Asia and Nova Scotia...more.
back to top	Fixed vs. Variable Displacement Hydraulic Systems An offshore crane mounted on a fixed structure typically operates for 150-300 hours per year, and a crane used to support drilling operations typically accumulates 3,000-5,000 hours per year. The fixed displacement gear type hydraulic system works well for many years on fixed platform applications given the low cumulative hours...more.