How does a vacuum breaker work?

Due to the formation of a vacuum, it can damage the equipment; therefore, a vacuum breaker must be installed to introduce air into the system and break the vacuum condition.

If a safety valve is installed in the reverse direction, isn’t it just a vacuum breaker?

I’m stunned; it’s the first time I’ve seen such an interpretation!

This post was last edited by Chemical Gas Purification on 2010-11-9 05:06. A vacuum breaker is an important device used in large and medium-sized lift pump stations to interrupt the flow in the siphonic discharge channel, thereby ensuring the safe operation of the main machinery. It uses the pressure difference between the internal and external atmospheres in the siphonic water discharge channel as its power source; through the action of the double-door lever and the pressure-balancing mechanism, the valve cover can seal to prevent air leakage, as well as open and close automatically, achieving coordinated operation among the double-door lever, the pressure-balancing mechanism, and the electrical interlock. The siphon effect is caused by the gravitational forces between liquid molecules and differences in potential energy; in other words, it utilizes pressure differences in the water column to push water upward before it flows back to lower levels. Since the water surface at each end of the tube is under different atmospheric pressures, water flows from the side with higher pressure to the side with lower pressure, until the atmospheric pressures on both sides are equal and the water levels in the container become the same. At that point, the flow of water stops. The siphon effect can be used to quickly draw water out of a container. The siphon is an ancient human invention – as early as the 1st century BC, people had already created a peculiar type of siphon. In fact, the siphon effect is not entirely caused by atmospheric pressure; it can also occur in a vacuum. The force that pushes liquid upward is the cohesive force between molecules within the liquid. During a siphon effect, more liquid flows out of the tube than flows into it, resulting in an imbalance in gravity on either side, which allows the liquid to continue flowing in one direction. As liquid rises up the tube, the pressure decreases. If the tube is very tall, the pressure drops to such an extent that bubbles (composed of air or other gases) form inside the tube. The maximum height at which a siphon can function is determined by the formation of these bubbles. Bubbles break the continuity of the liquid, reducing the force between gas molecules at either end of the bubble to zero, thereby disrupting the siphon effect; therefore, the tube must be filled with water. Under normal atmospheric pressure, the siphon functions better than in a vacuum, as the atmospheric pressure acting on both ends of the tube increases the pressure throughout the siphon.

Vacuum breakers are primarily used in water supply pipelines; when negative pressure is generated in the system, they can draw in air promptly to prevent backflow and contamination due to siphoning. It seems that right now there’s only the OR brand

Vacuum breakers are primarily used in water supply pipelines; when negative pressure is generated in the system, they can draw in air promptly to prevent backflow and contamination due to siphoning. It seems that right now there’s only the OR brand