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| DOC9063L
Ocean Master 1000
In a fish handling system, where the pump is working without liquid separator, the piping can be critical.
The pipe pos 6 will be a combination of a discharge and a suction pipe and the design of this pipe is very
important.
Figure below shows a standard setup. When the pump is discharging, the tank pipe pos 6 will carry a
mixture of air and water, which is the sealing water supplied to the pump. When the 4 way valve pos 2
change position this pipe becomes the suction pipe and water that is in the pipe will enter the pump. In
normal situation a small vibration will follow when the pump is injected with water on the suction side.
It is important to keep a high velocity > 30 m/s in this pipe and design it as short as possible without
“water traps”. The velocity can be calculated based on the nominel flow and the pipe diameter.
Another and safer solution is to place the 4 way valve closer to the fish tank as illustrated below.
3.1 Piping
DOC1627418_2
3.2 Service liquid adjustment - Pressure method
In order to get the correct water pressure to the pump it is recommended to build the supply line as
illustrated below. For correct service liquid supply, the pressure needs to be adjusted to between 0,6 and
0,8 bar(g) when the pump is running unloaded.
DOC1627418_3
