Erosion Feeders Are Dry Chemical Feed Systems
Chlorine erosion feeders or flow through chemical feed systems, are feeders that operate on a stream of water which makes contact with the dry chemical located inside. The stream of water causes the dry chemical to erode and dissolve into the flowing water. Proper operation of a dry chemical feeder, depends on a few concepts! These concepts include:
There are some erosion dry chemical feeders, that use a mechanical gate or rotating screw to move the granules into the path of the flowing water.
It is during this process, that the granules are dissolved in the water which is then fed into your swimming pool.
Dry chemicals not only come in granular form. They can also be purchased in tablet form which come in various sizes and shapes. Dry erosion feeders that use the larger size chlorine tablets (3 inch), have a plate installed inside that prevents the tablets from being completely submerged in water.
This separation plate has holes that allows the stream of water to hit the bottom of the tablets; thus, causing them to slowly erode and dissolve. You can find this concept or type of erosion design in a PPG Power Base chlorination system. An example of one is pictured below.
Using venturi injectors to operate erosion feeders
Some times a dry chemical erosion feed system is installed and operated on the pressure side of your circulation pump.
If this is the case, operation of the chemical feeder will depend on a venturi effect (vacuum) to operate.
A venturi system is one that creates a vacuum pressure as water (fluid) passes through it.
The output or discharge side of your dry chemical feed system is connected to the suction port of the venturi system.
During this process, the chemical solution will be sucked into the flow of circulation for your pool or spa.
The effectiveness of erosion feeders
At this point, the erosion of a tablet is gradually wearing away in the chemical feeder. If you decide on using this type of pool sanitizing system, the effectiveness of your system will depend on these four basic factors...
Maximizing the effectiveness of your erosion feeders
Observing or reading the instructions and operators manuals that come along with your feeder, will help you maximize its full potential. These manuals will show you how to properly install the feeder and properly control it as well. From your operators manual you will be able to determine the pool or spa size...that your feeder/s is capable of treating.
As a swimming pool operator/owner, it is vital that you understand the safety information that is provided by the manufacturer on your erosion device.
This my friend...will eliminate any potential risks to you or someone else. If you have erosion feeders that are improperly operated, there is a great chance that they could...God forbid...rupture or explode.
This is a very dangerous situation which could occur when you or some other attendant is around. This could send the lids as well as pieces of pipe flying through the air. This can cause serious injuries or death.
During the operation of your erosion feeder the flow of the water must be carefully adjusted. This is how you will maintain the proper amount of disinfectant going to your swimming pool or spa water system. There are some commercial erosion systems that are installed with one or more flow regulating valves. Some State code regulations may require you to have a flow meter install as well.
Dry chemicals that are commonly used in erosion feeders.
As I mentioned earlier, dry chemicals not only come in granular form. They can be brought in solid tablet form as well. These chemical tablets can either be solid chlorine releasing or bromine releasing. Emphasis are put on these type of tablets, because they are the most commonly used ones in an erosion feed system. Hence the names chlorinator feeder and Bromine feeder.
Types of erosion feeders for your pool or spa treatment
There are various types of dry chemical feeders that are available for spa and swimming pool sanitation. Examples of some of these devices are as follows:
Problems associated with pressure to vacuum erosion feeders
Installing this type of chemical feed system, will cause certain draw backs. For instance, most of the pool chemicals being fed to your swimming pool may cause deterioration. This deterioration is usually seen in your circulation equipment such as...
If you utilize probes to measure the chemical levels in your swimming pool, you must ensure that they are not giving you a false reading. You want to be concern about this because water that has just being chemically mixed...can give a false reading when it passes the head of your probes.
Specialized mechanical dry chemical erosion feeders
In some chemical feed systems, pool chemicals are metered into what is called a chemical feed tank. The metering process is accomplished by a screw mechanism which is either a mechanical gate or shutter type device. Again the output or discharge of this type of system is drawn into your pool circulation line by a venturi injection (vacuum) system or by a booster pump.
When using mechanical dry erosion feeders, the tank has to be properly sized. This will allow your pool chemicals the time needed to properly dissolve or erode. The correct size feeder will also allow better delivery of the chemicals to your swimming pool or spa. There are many different types of designs for a dry chemical feed system; hence, you always want to install the one that is right for the amount of water you are treating.
Fact: You want a feed system that you can afford and at the same time, one that will properly maintain your pool water chemistry. The safety of your pool bathers is your responsibility; therefore, you have to make sure that your swimming pool water is properly sanitized at all times. So protect your swimmers...try using dry chemical erosion feeders.
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