All technical papers are available in PDF and compressed formats (Recommended for Mac/Safari users).
Hoist Drum Rotation Indicators
The system consists of three different components for each hoist: a transmitter, a driver and an indicator. The system is bi-directional and extremely precise. The system can be installed on any or all of the hoists on a crane...more.
Hoist Lowering Dynamic Braking and Speed Control
The dynamic brake valve is attached to the motor without the use of hoses as required by API Specification 2C for hydraulic cranes. Its primary purpose is as a safety device to prevent gravity from running away with vertically-suspended loads. This is accomplished by applying positive pressure in the downward direction to slightly pilot open the dynamic brake valve. (The dynamic brake valve requires positive pressure from the power source to release-also an API Specification 2C requirement)...more.
Seatrax SB Series Platform Utility Cranes
- Proven Safety Features
- API Type E kingpost design. No "Rotek"-type slew bearings or attachment bolts that can fail needed. The crane is permanently welded to the platform topsides.
- Integral anti-two-block feature. No hanging weights, boom-mounted valves or hoses required.
- Cable-suspended boom ensures smooth and safe lowering of the boom.
- External fail-safe drum brakes on Seatrax hoists. Geartrain failures need not result in loss of the load...more.
Seatrax Counter-Luffing Boom Stops
With the growth of the oil and drilling industries moving toward deep water offshore operations, more supplies and larger equipment are stored on location. Many platforms and rigs continue to lose storage and working space. This lack of space combined with platforms' increasing size, requires cranes be equipped with longer booms that must work at closer radii to maximize the use of available deck space.
To solve these problems, Seatrax uses its patented boom stop. The hydraulic boom stop offers several advantages over conventional spring hard boom stops, which include...more.
Name That Crane
We often get inquiries along the lines of, "We need a 100-ton crane." So, what exactly is a "100-ton" crane? This can mean many different things to many different people, which is why we need a common term of reference. To define this term, we need to look at a little background.
The Offshore Oil & Gas industry was established in 1954 with the first fixed platform installed near Morgan City, Louisiana in the Gulf of Mexico. The only cranes available for use on these early platforms were existing land-based construction machines, such as crawler cranes. The designation system the offshore industry used was the same one as used to identify construction equipment in the United States. That designation system was developed by the American Power Crane and Shovel Association prior to WWII and has been used to classify or "name" mobile construction cranes since that time. This system uses a naming convention based on tonnage....more.
Redundant Boom Limit System
The electric boom angle limit system is simply designed to use a solenoid valve to redirect the joystick signal from the control valve to the tank. This system incorporates sensors on the boom base to override the boom hoist hydraulic controls.
When the boom comes in contact with the boom rest or boom stops, the sensors send an electrical signal to a solenoid valve. The solenoid valve is installed in the hydraulic signal line between the standard boom kick-out and the boom hoist control valve....more.
Constant Tension Device-"Wave Follower"
Seatrax offers a constant tension device appropriately called a Wave Follower. The Wave Follower allows an operator to attach large loads in heavy seas by reducing of risk of damage to the crane, load or supply vessel. The Wave Follower accomplishes this goal by allowing the hoist line to "yo-yo" at a low back tension prior to liftoff from the supply boat deck...more.
Seatrax Boom Tip Rollers
To provide increased boom protection, Seatrax engineers have developed the new boom tip rollers, a solution that not only shields the boom and wire rope from damage but also makes crane operation easier...more.
Life Cycle Cost Comparison: Seatrax SB Series Utility Cranes vs. Conventional Box Boom Cranes
This technical paper compares Seatrax's SB Series utility cranes to conventional box boom cranes...more.
NEC vs. IEC Hazardous Area Classification
This technical paper compares NEC vs. IEC Area Classifications...more.
Brake Actuator Pushrod Pin
Seatrax has developed a new pushrod pin with secondary retention to increase reliability of its brake actuator...more.
This technical paper compares Seatrax's equipment protection to our competitors'...more.