How to prevent siphoning between two storage tanks? !
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There are two storage tanks, one small and one large; a check valve is installed in front of the small tank. The liquid level in the large tank is higher than that in the small tank – how can siphoning be prevented? Can adding a vent valve prevent siphoning? ! Add elbow? ! Thank you. . . . .
The key is how the large and small storage tanks are connected. If it’s just a simple bottom connection and one still feels uneasy even with a check valve, adding a vent pipe in the middle at a height higher than the highest point will definitely be effective. If the outlet of the large storage tank is at the top but is submerged below the liquid level inside the tank, the method remains the same. The problem is that the vent pipe isn’t controlled by a valve; does this affect other operations?
What is the principle behind a Gagen vent pipe? !
A break siphon is added at the top of the liquid connection line between Tank 1 and Tank 2, leading to the top of Tank 1.
What’s the principle behind this? Is it related to atmospheric pressure? !
Under what circumstances can siphoning occur?
What are the pressure specifications for the two tanks? ? ? ? ? ? ? ? ? ? ?
It’s just a broken siphon; the gas phases are connected. You should at least know what causes a siphon effect, right? It’s due to the pressure difference; once the gas phases are connected, it’s like a U-tube, and the liquid levels at both ends will be equal, so no siphoning occurs. Also, when liquid is introduced into a storage tank, it is usually inserted below the liquid level at the bottom of the tank; similarly, a vent hole must be provided in the gas space at the top of the inlet pipe, for the same reason
The large tank is 4.5m, and the small tank is 2.2m.
Two methods: 1. Install vent valves on the tops of both tanks, as well as self-acting control valves, to ensure that the pressure inside the two tanks is equal. 2. Add vapor equilibrium tubes to the tops of the two tanks.
I would like to ask the experts: are there any requirements regarding the diameter of the gas phase tube used to break a siphon effect? Is it related to the water flow rate?