Misting System Pressure Requirements
There are essentially three levels of pressure requirements for a misting system, and the one you choose will depend on your needs and budget.
Low-Pressure Misting System
Low-pressure misting systems operate at a pressure of 40 to 60 PSI (pounds per square inch). They work at city water pressure, meaning that low-pressure misting systems can be connected directly to a garden hose or tap.
The main advantage is that low-pressure misting systems are more affordable since you don’t need a dedicated pump. It will also reduce the ambient temperature by about 20 degrees Fahrenheit, making it perfectly effective.
On the downside, low-pressure misting systems form large water droplets compared to other misters, which means that you will have more moisture in the air and on surfaces around you, and the area will also take a bit longer to cool.
Mid-Pressure Misting System
Mid-pressure misting systems have a pressure ranging between 160 and 250 psi. Therefore, they require a dedicated pump and a system with finer nozzles.
The advantage of a mid-pressure system is that its droplets are much finer than those of a low-pressure system. Though the temperature benefit will remain largely the same, the droplets should not leave any residual moisture on surfaces if everything is sealed and set up correctly.
A High-Pressure Misting System
High-pressure misting systems have an average pressure of about 1000 PSI, but they can range anywhere from 750 to 1500 PSI. The higher the pressure, the finer the water droplets will be.
High-pressure misting systems provide optimal results. The fact that the water droplets are so fine means that you get many benefits:
- The system can cool the area by as much as 30 degrees Fahrenheit.
- Cooling starts within just a few seconds rather than a few minutes.
- They leave no residual moisture on surfaces.
However, the system is the most expensive of the three. Not only do you need a powerful pump, but you also have to get hoses, joints, and nozzles rated for the pressure you need; otherwise, they will burst and leak.
A Comparison Of The Pressure That Misting Systems Need
This simple table will help you to identify the type of pressure pump you need for your misting system
40 to 60 psi
160 to 250 psi
750 to 1500 psi
How Much Pressure Should A Dairy Farm Misting System Have?
Many factors affect this:
- How much average temperature and humidity is on your farm? You should ideally determine this on an hourly basis to account for variances.
- How much direct sunlight are your cattle under? More sunlight requires more cooling.
- Do you have other cooling systems in place?
Misting systems are ideal for dairy farms where the average temperature is above the normal body temperature for cattle. If the temperature isn’t much higher, a low-pressure misting solution should work (between 40 and 60 PSI). However, opting for a mid-pressure system of 160 to 250 PSI is better to avoid residual moisture.
If you are in a scorching climate, spending more and installing a high-pressure system is a good idea. It’s unbelievable how much of a difference 750 to 1500 PSI makes.
Why Is The Pressure Of A Misting System Important?
Misting systems work by spraying water droplets into the air. It should not be the actual water that cools the area; instead, the hot air should evaporate the water, absorbing some of the heat and resulting in a cooler environment.
With this in mind, if you can feel the water droplets, the system is not doing its job correctly. That’s why a low-pressure system will be less effective than a mid or high-pressure system. Because more pressure leads to finer water droplets, they can evaporate much faster and cool down the area more effectively.