The TRANSVAC® pump system was designed by ETI to transfer fragile and sensitive materials suspended in water without damage. Minimizing damage in fish translates directly into more profits from every fish you load, unload or process.

ETI offers a complete range of TRANSVAC® pumps for installation on board vessels and docks, as well as portable systems. ETI is the world’s leading supplier of damage-free fish pump systems. with more than 1000 TRANSVAC® delivered worldwide.


Principles of Operation

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The TRANSVAC® consists of an inclined tank with a separate inlet and outlet (exit). Both the inlet and outlet have check valves (swing-checks). The inlet check valve allows water and fish to enter the tank, while the exit check valve allows fish and water to flow out of the tank. The tank is supplied alternately with vacuum and pressure. Both vacuum and pressure are developed by a liquid ring pump. Under vacuum, the tank exit seals and fish and water are drawn into the tank through the suction hose which is attached to the inlet. When the tank is full, the vacuum is stopped and pressure is applied to the tank. This pressure causes the exit check valve to open and the mix of fish and water to empty from the tank via a discharge hose attached to the exit connection. When the tank is empty, a vacuum is again applied to the tank and a new transfer cycle begins.


Transvac® Features

High Durability - All TRANSVAC® models are manufactured from the highest quality materials for optimum durability and dependability.

Soft (Top) Entry - ETI patented feature that allows the inlet check valve to operate shut without interference from the fish in the suction circuit preventing fish damage.

Soft Exit - Fish exit the pump via a smooth one piece outlet connection which has no uneven joints or surfaces to inflict damage to the fish.

Anti-Flood Device - One of the many safety features designed into all TRANSVAC® pumps. This prevents over-filling the tank and damaging the liquid ring pump.

Air Relief Valve - Prevents the pump from causing a surge of air after completing the discharge of fish and water. If a pump does not have such a device, the processing line can be damaged and the pumping system can experience safety problems.

Nickel-Enriched Liquid Ring Pump Materials - TRANSVAC® systems feature nickel- enriched iron components in the liquid ring pumps. This material is formulated for use in highly corrosive environments (e.g. sea water) and has a proven life span 3 to 4 times that of standard cast iron components