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What is a vacuum breaker?


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2015-07-17 17:38:15
2015-07-17 17:38:15

A vacuum breaker is a mechnical device used to avoid backflow or a negative pressure in a plumbing system.

It typically consists of an air valve with a spring holding it closed. When the pressure within the system is positive, the valve remains closed. When the pressure is negative (less than atmospheric), the negative pressure overcomes the force of the spring holding the valve closed and the it opens, typically allowing normal atmospheric air to enter the system, thereby eliminating the negative pressure. Otherwise, the negative pressure might cause backflow of the plumbing system.



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That would depend on the application as there are many uses and shapes and specifications for a vacuum breaker

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A vacuum breaker does not allow back flow into the potable water system A syphon breaker is normallly installed on a tank that there is a possibility of the tank imploding

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air circuit breaker is use air to break acircuit and its used in low tention side only ..vacuum circuit breaker side vacuum was used to break a circuit its used in high tention

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A vacuum circuit breaker is a high-voltage circuit breaker whose contacts separate within a vacuum dielectric. The vacuum contributes to extinguishing the resulting arc because ionisation cannot take place while the arc is stretched between the separating contacts.

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"Air" and "Vacuum" describe how the breaker extinguishes the arcing current. An Air breaker opens far enough that the dielectric strenght of air is enough to extinguish the arc. A vacuum breaker's contacts are in a vacuum. Oil breakers use oil. SF6 breakers use SF6 gas to extinguish the arc.

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