Generic selectors
Exact matches only
Search in title
Search in content

Benefits of Using Vacuum Breakers

Check All Valve
Valves 101: Low-Pressure Relief Valves Check-All Valve

Benefits of Using Vacuum Breakers

When unwanted air develops in a closed vessel or pipeline, vacuum breakers provide a simple, dependable way to relieve it. A vacuum breaker allows air to enter a system to replace a change in volume that may occur during the stream-to-condensate phase change. They can be used to prevent contamination from backflowing in fluid handling systems and protect equipment against collapse or implosion.

It’s a simple concept. The vacuum breaker will not allow air to escape from the pipeline. When the pressure in the barrel—which naturally wants to suck in outside air because of the cooling—is enough to overpower the spring, the check mechanism moves in with the spring and allows the outside air into the barrel. This prevents the implosion of the barrel. There are different spring tensions for different strengths of vessels.

Vacuum breakers provide tight enclosures with tension response, provide large air venting capacity, and are designed for easy installation and long service life. An optional air release valve can be piped to the side of the valve to release trapped air during pipeline operation—slowly exhausting the air that was admitted into the pipeline. The slow release of air prevents the sudden rejoining of separated columns in a pipeline and the associated pressure surges, or water hammer.

The vacuum breaker seals against positive pressure keeping the check mechanism in the closed position. With a light spring cracking pressure (spring setting), the check mechanism will begin to open at very low vacuum conditions providing immediate protection. When positive pressure is restored in the pipe or tank, the valve will automatically close and seal tightly. The vacuum breaker is mounted at critical pipeline high points, penstocks, or tanks and allows for rapid inflow of atmospheric air to reduce vacuum conditions in piping systems.

In general, low-pressure relief valves (such as spring-loaded check valves) can serve dual roles as vacuum breakers. A tank is a common application where a check valve would be installed at the top of the piping to relieve the vacuum when the tank is being pumped down.

Another application where check valves can function as vacuum breakers is when there is a dramatic change in piping elevation. Vacuum relief valves can also be installed in vacuum systems in order to pull a specific amount of vacuum. There could be some thermal applications where the media can change from very hot temperatures to very cold temperatures, and the differences in volume between temperatures is an instance that may require a vacuum breaker to relieve that vacuum when it is created as a result of a variance in temperature.

Engineering check valves since 1958, Check-All® Mfg. Co. is an outstanding source for all your check valve, vacuum breaker, and low-pressure relief applications. For more information, please visit https://www.checkall.com/2020/08/26/what-is-a-check-valve-used-for/

Related Articles

Related Whitepapers

How to Transfer Hazardous Chemicals

Most chemicals are either toxic, volatile, or highly corrosive and are therefore to be handled with care. Chemicals can pollute and harm the environment and…

High-Pressure Machine Tool Coolant Pumps with Superior Handling of Abrasive Fines and Metal Particles

Compact, Seal-less Pumps Reduce Costs, Improve Cutting Performance and Boost Productivity The use of high-pressure cooling for machine tool operations has increased significantly in recent…

10 Essentials for Selecting a Double Diaphragm Pump

In almost all factories you can find at least a couple of air-operated double diaphragm pumps. Not always in the heart of the process, and…

Verderflex Dura 65 Datasheet

Verderflex Dura 65 Peristaltic Hose Pump Designed for applications such as Metering, Dosing, and Transfer duties (strong advantages on sludges, slurries and abrasives) Benefits Class-leading…

Comments

Leave a Reply

Your email address will not be published. Required fields are marked *

Sign up for our Newsletter!

Select list(s) to subscribe to


By submitting this form, you are consenting to receive marketing emails from: Empowering Pumps & Equipment, 2205-C 7th Street, Tuscaloosa, AL, 35401, http://www.empoweringpumps.com. You can revoke your consent to receive emails at any time by using the SafeUnsubscribe® link, found at the bottom of every email. Emails are serviced by Constant Contact