Underwater clamshell grabs and orange peel grabs

Underwater clamshell grabs and orange peel grabs

Discover the complete range of amphibious clamshell grabs and orange peel grabs that we offer you, ready to be completely submerged and to handle materials such as: mud, sludge, sand, rubble, stones, husks...

Underwater orange peel grabs

Electrohydraulic orange peel grabs prepared to be completely submerged.

Complete supply

For projects that need a complete handling solution, Credeblug offers complementary material to its underwater machine range:

  • Underwater plug: for a fast and simple connection between grab and cable reel (IP 67).
  • Electric cable reel: synchronization betwenn the machine and winding velocities with a constant torque applied to the necessary cable length in every case.
  • Control panel: it incorporates all the indicators and necessary safety elements for grab´s control and operation.
  • Chain hoist: single rail, with double speed components in its movements and variable speed drive incorporated for the longitudinal and transversal travelling movements.

Design and simulation

  • Our design office develops each design according to F.E.M. 1001 Section I:1998, UNE-58132 and UNEEN 13155 using the latest 3D and CAD/CAM tools.
  • Each new design is validated and optimised using Finite Elements Analysis technique in the way to analyse fatigue effects and warranty 2.000.000 cycles for components´ and machines´ working life.

Electro-hydraulic system functioning

Motor reversal Electrically operated valve
Wire quantity: 4 Número de hilos necesarios: 7
Pump type: Piston pump (fix flow) TPump type: Gear pump (fix flow)
Piston pump (fix flow)


  • Structure manufactured in S355 J2G3 rolled steel (elastic yield 510-610 N/mm2).
  • All the models are supplied completely prepared for their immediate running including the electrical installation and complete internal wiring.
  • • In addition to the cleaning combs and draining holes (included), it is possible to install interchangeable manganese wear resistant teeth (up to 500 HB) into grab´s valves in the way to improve machine´s penetration into the material.

Anticorrosive treatment

The whole underwater BLUG range is protected from the corrosion through the application of 2 EPOXI RUSTPREVENTIVE - ZINC PHOSPHATE 50 microns priming coats cured with polyamide and 3 coats´ finish of PAINTING TAR-EPOXI in black colour, cured with 2 components´ polyamide and a thickness of 50 microns/each.

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