SILKSTREAM ADVANTAGES:

HIGHER QUALITY PRODUCT - With the SILKSTREAM™, fish are transferred in one smooth and continuous movement. They do not come in contact with any hard surfaces during transfer. Live fish are transferred damage-free and nearly stress-free. In that regard, they tend to maintain their quality. Higher quality is reflected in a higher market value. Fish transferred with a standard vacuum pump are crowded together into the tank and then exit through a discharge hose. These systems tend to increase the stress level of the fish. Poorly designed vacuum systems, can even cause physical damage to the fish.

HIGH CAPACITY FLOW - The SILKSTREAM™ transfers fish continuously at a high rate. The system can easily and safely transfer 4.0 Kg (8.8 lbs) salmon at the rate of 8000 per hour. Sea Bream, with an average weight of 300-500 grams, can be transferred at the rate of 30,000 per hour. The flow is continuous in the system, maintaining a high flow rate in the fish suction hose. For this reason, the fish do not have to be crowded to the extent required when using a standard vacuum pump. The suction flow in a vacuum pump stops movement when it shifts from suction to discharge, (or shifts from one tank to the other, in a twin tank system). This suspended flow in the fish suction hose, allows fish to swim back out of the hose. Therefore, fish must be crowded more drastically to maintain a good flow, with a vacuum pump. Excessive crowding normally causes stress in the fish.
 

LABOR SAVINGS - Transferring fish with the SILKSTREAM™ generally requires only two people. Manual methods of transferring live fish are both very labor intensive and time consuming.

 

SILKSTREAM™ APPLICATIONS: 

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Automated Harvesting - The SILKSTREAM™ can be used to quickly harvest large amounts of live fish thus reducing labor costs and improving fish quality.

 

Grading - SILKSTREAM™ fish transfer systems produce excellent results when adapted for use with both manual and mechanized grading systems. In the Mediterranean,  SILKSTREAM™ is used to transfer Sea Bass and Sea Bream directly to a mechanized grader.

Cage to Cage transfers - Moving fish from one cage to another is easy work with a SILKSTREAM™. The fish suction hose is simply placed in one cage and the dewatering box is directed to discharge into the receiving cage.

Lice Removal - The acceleration a salmon undergoes as it passes through the SILKSTREAM™ head has proven effective at dislodging/removing up to 85% of the sea lice on salmon. The lice are then collected, from the dewatering lines with bag filters, to prevent their return to the pens.

Counting - Fish can easily be counted manually or automatically with electronic counters after passing through the SILKSTREAM™ system. The system delivers fish nearly one at a time for accurate counts.

PRINCIPLE OF OPERATION:

The SILKSTREAM™ system consists of a hydraulic or diesel driven water pump, the flow head and a dewatering/decelerator unit (bazooka). Water is drawn, by the primary water pump and propelled through the flow head. Inside the flow head, the primary water is forced through a gap, around the full (360°) interior circumference of the head, and over a coanda surface which creates a continuous jet suction effect. The fish suction hose is attached to the suction side of the flow head. Suction created in the flow head draws fish and water into the system in a smooth and continuous fashion. After passing through the flow head, fish and water are directed through a "bazooka" (primary dewatering system), where much of the primary water is expelled. The fish and a regulated quantity of water continues on from the "bazooka" to the system end point (i.e. a grader, sorter or dewatering box). The fish and water are dispersed and slowed at the discharge point. The remaining water is also removed by the end point handling equipment. It is important to note that fish move through the entire system without passing through pump impellers or any other moving mechanical parts.