J D Neuhaus said the hoist is aimed at companies looking to meet the NORSOK, a Norwegian petroleum industry standard, which covers offshore cranes, power-driven winches and hoists.

The NORSOK requires companies to use an emergency device for safely lowering loads in the event of a cut in the main power supply.

J D Neuhaus said its EH monorail hoists with lifting capacities ranging from 25 to 60USt may now be equipped with the safe lowering device as an added option.

This new device can be added to existing fail-safe disc brakes intended to stop the load if mains power fails. Together the breaks and the safety unit stop the load and enable safe lowering.

The unit contains a separate pressurized air reservoir tank normally kept at a mains air pressure of 6 bar.

Included is a controller designed for positive two-handed use, which the company designed to allow operators to lower loads in a controlled movement.

One button can activate normal and emergency lowering operations. The second button turns on the integrated safety brake permitting the safe controlled lowering of the load.

The ‘checkvalve-protected’ air reservoir, containing enough air to lower a load in an emergency, is topped up through the course of normal hoist operations.

Hoists and cranes in hazardous areas are suitable for use with the device as it is designed for explosive environments, meeting Ex ratings as well as hoists in humid, dusty, high or low temperature environments (from -20°C to +70°C).

The company can supply the hoist with Det Norske Veriras certification, spark protection and higher Ex rating, overload protection, rack and pinion drive, two-speed trolley travel control and filter silencers.