Hydraulic equipment for Spanish fishing boat

A complete Marco system was manufactured and supplied by Técnicas Hidráulicas in Spain, including the new Purse Davit SK-230. This new design substitutes the classic hanging blocks by fixed reclining blocks with two return blocks in the centre of the davit.

This offers a larger distance between the side blocks for easier ring releasing operation, while keeping perfect alignment of purse wire in perpendicular direction to the purse winch due to the centre blocks.

According to Técnicas Hidráulicas, this reduces all efforts and provides a longer lifecycle to the cable and the components involved in cable guidance. In addition, thanks to the fixed blocks, there is an improvement of the safety and comfort for the ring releasing operator. Two sets were realised with a pursing time of 17 minutes on each.

The fishing and deck machinery set included the following equipment:

· One Marco purse seine winch, model WS-586, performing 1000hp, with three drums with independent drives. Each drum performs a total pull of 52 tonnes and main drum can store 4200m of cable of 28mm. As new feature, forward and main drum include three step series/parallel system, improving winch performance and pursing times;

· One control console for the complete manoeuvre, fabricated in stainless steel with proportional oil piloted controls. For the purse winch it includes independent controls for each drum, three step series/parallel selectors, three speed selectors, render controls, clutch-brake controls, air brake regulators and gauges; and

· One electro-hydraulic power unit consisting of four each 250kW electric motors, each with two vane double pumps driven through elastic couplings. Three are main units and the fourth one remains for back-up. Pumps are interconnected in such way that back-up unit can automatically substitute any of the main units, driving at full load with any three motors.