Fish graders and fishpumps

Subcategories

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  Elevators

  Archimedean Screw Conveyor for Aquaculture
  

  🔧 Technical Description

  • Operating Principle:
    The elevator consists of a helical screw partially or fully enclosed in an inclined tube or trough. When the screw rotates, it continuously moves the contents (water + fish/eggs) upward.

  • Materials:

    • Structure: stainless steel or reinforced plastic (corrosion resistant)

    • Screw: stainless steel or composite materials

    • Casing: sometimes made of PVC or high-density polyethylene

  • Typical Dimensions:

    • Length: from 1 to 10 meters depending on the application

    • Inclination: between 30° and 45°

    • Diameter: depends on the flow rate and size of the fish

  🐟 Aquaculture Applications

  • Live fish transfer: from grow-out tanks to sorting stations, trucks, or processing units

  • Water lifting: for feeding tanks or recirculation systems

  • Transport of eggs or fry: thanks to the smooth, continuous movement that reduces stress and injury

  ✅ Advantages

  • Animal welfare-friendly: low turbulence, gentle handling

  • Reliable and durable

  • Moderate energy consumption

  • Easy to clean and maintain

  ⚠️ Considerations

  • Proper rotation speed to avoid injuring fish

  • Inclination and diameter must be adapted to the species and life stage

  • Regular maintenance to prevent clogging and buildup

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  Fish pumps

  A fish pump is a device designed to gently transfer live fish from one tank to another, or to grading systems, transport trucks, or processing units, minimizing stress and physical damage. It is essential in intensive or semi-intensive aquaculture operations.

  Technical Features

  • Operation: suction and discharge system, usually via Venturi effect or specially adapted centrifugal pump

  • Flow rate: varies by model, typically between 50 and 500 m³/h

  • Fish size: suitable for both fry and market-size fish (e.g. salmon, trout, seabass, seabream)

  • Discharge height: up to several meters depending on setup

  • Controls: often equipped with variable speed drives for flow adjustment

  Advantages

  • Gentle handling: reduces injuries, scale loss, and stress

  • High efficiency: handles large volumes quickly

  • Easy integration: fits into existing farming systems

  • Compatible with automatic sorting and weighing systems Available Options

  • Materials resistant to saltwater (stainless steel, technical plastics)

  • Remote control / automation

  • Water lubrication systems to reduce friction

  • Loading/unloading hoppers

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  Fish graders

  A fish grader is an essential device in aquaculture farms used to sort fish by size. Grading is crucial to optimize growth, reduce cannibalism, and organize fish batches for sale, vaccination, or transfer.

  Technical Features

  • Operating principle: fish are guided over adjustable ramps or grids, or moved by conveyors through calibrated openings

  • Grading capacity: up to several tons per hour depending on the model and species

  • Number of size grades: typically 2 to 6, adjustable mechanically or electronically

  • Suitable for: fry, juveniles, and market-size fish

  • Materials: stainless steel, marine-grade aluminum, food-safe plastics

  Advantages

  • Fast and accurate sorting, with minimal handling stress

  • Improved productivity: better batch management

  • Gentle handling: reduced injuries and losses

  • Easily integrated into automated or mobile grading lines

  Available Options

  • Manual or automatic feeding (via pump, screw, or conveyor)

  • Motorized adjustment of sorting openings

  • Mobile sorting table or wheeled chassis

  • Integrated washing system, ergonomic design for operators

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  Sorting table

  The fish sorting table is equipment used to sort fish by size, weight, or physical condition. This device is essential in aquaculture farms to optimize batch processing before transferring fish to tanks, selling, or processing. It also helps to reduce fish stress while ensuring fast and efficient sorting.

  Technical Features

  • Structure: typically made of stainless steel or corrosion-resistant food-grade plastic

  • Dimensions: adjustable table depending on specific aquaculture needs (customizable length and width)

  • Sorting system: table inclination, vibrations, or rollers to guide fish into designated compartments or chutes

  • Capacity: sorting several tons per hour, depending on the model

  • Feeding: manual or automatic (via conveyor, Archimedes screw, or pneumatic system)

  Advantages

  • Fast and accurate sorting, minimizing handling and stress

  • Adjustable system for different fish sizes, from fry to adults

  • Ease of use and maintenance, with integrated cleaning systems

  • Labor savings and time optimization

  • Improved fish quality through careful sorting and efficient batch management

  Available Options

  • Electronic control or simple control panel to adjust sorting parameters

  • Adjustable vibrations or modular ramps depending on fish size and type

  • Inclined or flat tables depending on aquaculture needs

  • Integrated washing system for optimal hygiene after each sorting process

  • Mobile chassis for flexible use at different workstations