AtmosphericVacuum Breaker

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Vacuum breakers allow air to enter a system in order to “break the vacuum.” In a heat exchanger, the vacuum is caused by condensing steam which inhibits condensate drainage.

The WVBSS Series Vacuum Breaker is used on heat exchangers, air coils, jacketed kettles, pressing machines, boiler feed water tanks, sparge system, water line or anywhere else an unwanted vacuum can occur. It is a very important item in any steam system as it allows for the proper drainage of condensate by releasing or "breaking" vacuums that may be formed during steam condensation. It is also important to use on a tank when liquid is being pumped out. An unwanted vacuum can stop the pumping action as well as collapse a tank.

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Soupape casse vide & respiration, Pressure / vacuum relief valves re designed for protect tanks, vessels or systems from excess pressure or vacuum.

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The WVBSS Vacuum Breaker is used on heat exchangers, air coils, jacketed kettles, pressing machines, boiler feed water tanks, sparge systems, water lines, or anywhere else an unwanted vacuum may occur. The WVBSS allows air to enter the steam or liquid system in order to “break the vacuum” caused by the condensing of steam or draining of liquid from a system. The elimination of vacuum is necessary to allow proper drainage of liquid from process systems.

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Temperature Set Point Achieved (Steam Flow Reduced; Since Only Required to Maintain Temperature) Once the set temperature is achieved, a signifificantly less amount of steam is required to maintain the temperature of the product inside the jacketed kettle. The steam supply valve will modulate to a near shut-off condition, dropping the pressure, and the kettle may be operating in vacuum. This action will impede the discharge of condensate as the pressure in the jacket will be less than atmospheric. Therefore, a vacuum breaker is required to allow air to enter the jacket and equalize the pressure. This then allows drainage of condensate through the steam trap by gravity.

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Drainage of liquids from storage tanks will also cause an undesirable vacuum which inhibits flow or can possibly collapse tank or vessel.

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The Vacuum Breaker functions like a simple check valve. Outside air is allowed to enter the system through the air inlet. However, when steam or water try to escape, the vacuum breaker closes off tightly.

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