Prestrainers
Our Model
Conmetal Pre-strainers are built to offer solutions in the pressing process and make this stage more efficient. For this purpose, robust, low-maintenance, and long-lasting screw conveyors are designed and built, offering a 10-year lifespan if maintained and operated according to the Conmetal operation and maintenance manual. They are manufactured in accordance with the CEMA standard, adapted to Conmetal’s experience.
Features
The Conmetal pre-straining system is designed according to the fish flow to be processed, based on mass balances for the required process speed. They are primarily manufactured for capacities ranging from 10 to 50 tons/hr of raw material.
These Pre-strainers are more resistant to corrosion and are also composed of one or two cylinders depending on the processing capacity.
Inside, they feature perforated screens to drain the water contained in the fish after the cooking process. This allows the cooked fish to advance, moved by a screw conveyor, through the perforated screen of the cylinder, draining the water from the fish.
By draining a significant portion of the water from the fish, a more efficient press operation is achieved, as the fish enters the press with less water and exits with moisture levels below 50%, leading to better costs in the drying stage.
The new Conmetal Pre-strainer model is manufactured entirely from AISI 304 stainless steel.
- Improved corrosion resistance
- More robust operation
- Improved cleaning and hygiene
- Greater water drainage.
- Good sealing system to prevent vapor leakage
Custom-made
We have two models in our catalog. If you need a larger industrial prestrainer, contact us
Uses in different industries
Wine
Chemical
Pulp & Paper
Mining
Steel
Energy
Primarily designed for the fishing industry. The CONMETAL Cooker is equipment for continuous operation with indirect heating, with capacities ranging from 10 tons/hr to 60 tons/hr of raw material.
Both the cylinder and the rotor are heated with boiler steam.
The equipment is manufactured in the form of a horizontal cylinder, through which the raw material is conveyed by means of a rotor, configured as a screw conveyor. The screw flights are stamped and have been specially designed to achieve cooking in a shorter residence time, thus better preserving the protein qualities of the product.
The CONMETAL Cooker is also designed for easy chemical cleaning. We also have reconditioned equipment, subject to availability verification at our plant.
Pre-strainers


Our equipment is fed into perforated mesh cylinders by a screw that moves the cooked fish inside the cylinder. This is driven by an internal screw conveyor, allowing it to advance and drain the water content from the fish.
At the cylinder outlet, the cooked fish is fed into the fish press to continue with the fishmeal production process.
There are two models and capacities of Conmetal pre-strainers: a single-screw model with a capacity ranging from 10 to 20 tons/hr of raw material. The second model is the double-screw, with a capacity ranging from 30 tons/hr to 50 tons/hr.
Our equipment features inspection covers on the top and sides along its entire length, and a good sealing system to prevent vapor leakage. Additionally, there is a valve at the bottom to evacuate material and water when cleaning is required.
They are easy to clean and have low maintenance costs.