For various reasons, water from high-level tanks on site is pumped to low-level tanks using centrifugal pumps; how can siphoning be prevented?
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For various reasons, water from high-level tanks on site is pumped to low-level tanks using centrifugal pumps; how can siphoning be prevented? Centrifugal pump with a flow rate of 100 cubic meters per hour and a head of 20 meters; suitable for ordinary water at normal temperature
The outlet is equipped with an electromagnetic air inlet valve that operates in sync with the pump’s shutdown; turning on this electromagnetic valve when the pump stops will suffice
Siphoning in the pipeline indicates that it is inserted below the liquid level; a hole to prevent siphoning can be installed above the liquid level. A check valve is installed at the pump outlet to prevent backflow, which could cause the impeller to rotate in the reverse direction and become loose.
At a high position on the pump outlet pipe, install a surge vent and valve (at a height above the high liquid level in the tank), which should be opened when the pump is stopped.
At a high position on the pump outlet pipe, install a surge vent and valve (at a height above the high liquid level in the tank), which should be opened when the pump is stopped.
This post was last edited by qugd on 2022-3-8 at 11:37. It’s not easy to create a siphon effect, but it’s much easier to break one; all that’s needed is to install a section of pipe with holes on the pump’s outlet pipe, with the holes being located above the highest liquid level in the lower tank. The drain fixtures on site can then be used to carry away the water that leaks through those small holes
I don’t understand what this question is asking – preventing siphoning? Afraid that the pipe will automatically pump water from a lower level to a higher one – is there such a thing?
I think what the original poster is trying to say is that when the pump stops, water will not leak downstream on its own from the pump outlet; rather, it is transporting water from a higher level to a lower one. If the pipeline design can be optimized on-site, then it’s possible to use gravity flow instead of pumps.
There should be valves on the pipeline; by closing those valves, water leakage can be stopped. The hole you mentioned might not be effective – when filling the fish tank, the outlet pipe isn’t sealed either, so air can get in. However, air cannot reach the higher parts of the pipeline and disrupt the siphon effect, so it’s necessary to create an opening at the water inlet side
The location of that hole needs to be above the liquid level at the water inlet
This type of design is quite rare. If siphoning can be achieved, it seems that the purpose of using this water pump isn’t very significant – wouldn’t it be enough to install a level control valve on the inlet pipe of the low-level tank and use siphoning to draw water in? It also saves electricity; this is how irrigation is carried out in many rural areas.