All technical papers are available in PDF PDF Icon and compressed formatsZip (Recommended for Mac/Safari users).
Hoist Drum Rotation Indicators

back to top

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.

 

 

 

 

 


PDF Icon Compress

Closed vs. Open Loop

back to top

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.

 

 

 

 


PDF Icon Compress

Utility Cranes

back to top

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.

 

PDF Icon Compress

Counter-Luffing Boom Kick-Out

back to top

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.

 

 

 

PDF Icon Compress

Name That Crane

back to top

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.


PDF Icon Compress

Redundant Boom High Angle Limit System

back to top

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.

 

 

 

PDF Icon Compress

Wave Follower

back to top

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.

 

 

 

 


PDF Icon Compress

Boom Tip Rollers

back to top

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.

 

 

 

 

 

 

PDF Icon Compress

SB vs. Conventional Box Boom

back to top

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.

 

 

 

 

 

 

PDF Icon Compress

NEC vs. IEC

back to top

NEC vs. IEC Hazardous Area Classification

This technical paper compares NEC vs. IEC Area Classifications...more.

 

 

 

 

 

 

 

PDF Icon Compress

Brake Actuator Pushrod Pin

back to top

Brake Actuator Pushrod Pin

Seatrax has developed a new pushrod pin with secondary retention to increase reliability of its brake actuator...more.

 

 

 

 

 

 

 

PDF Icon Compress

Equipment Protection

back to top

Equipment Protection

This technical paper compares Seatrax's equipment protection to our competitors'...more.

 

 

 

 


PDF Icon Compress