The Difference Between Polyurea Spray Machines and Spray Foam Machines

Selecting the appropriate equipment is essential for any business that relies on spraying material to create insulation or coating projects. The ability to do an activity efficiently depends on the tools or equipment used; therefore, it is essential to know the various types of spray machinery that can do the task effectively.

Equipment for coating and spray machines does not have the same capability to work with specific materials and requires using a different pressure for the application. Most high-pressure equipment can be interchangeable, regardless of whether it’s employed to spray polyurea or foam; however, lower-pressure machines tend to be employed to spray foam. The correct material spread for coatings should be above 1850-3500 psi, and foam application is possible with machines that range from 800-2000 psi. However, the caveat is that lower-pressure machines can spray foam, but only when using long hoses since they require higher pressure to spread the material efficiently.

Air-Driven and Pneumatic Machines

Aero-driven or pneumatic equipment has been used for over 60 years, although the technology has advanced far in general effectiveness. The technology behind these machines is founded on a simple two-component system comprising two pumps with an air motor that operates within the limits of a certain pressure ratio. A machine’s pressure rating measures how much material it can distribute according to fluid pressure. For example, if its pressure ratio is 25, it can give 25 psi of pressure for each pound of air pressure applied.

If the host is big enough to distribute the required material, pneumatic systems can distribute the application consistently. It’s not surprising, therefore, that this type of technology has been used for many years and is extremely reliable. However, the main downside is that it doesn’t allow pressure to be effectively controlled, which puts the operator responsible for monitoring the foam to ensure proper application and application.

When businesses start, pneumatic equipment is often the best option because of its simplicity and lower cost. As the business grows up, larger jobs will need more efficient equipment.

Hydraulic machines

In the 70s hydraulic technology utilized hydraulic power to run chemical proportioning pumps. It is often used for the application of polyurea coatings and dual-component foam. Some systems contain a valve that allows directions for the sprayer to shift. The quick changeover of the pump is the most desirable characteristic, leading to little pressure loss as the direction change occurs.

Because the chemicals employed in spray foam must be mixed before application, The hydraulic application permits more effective monitoring techniques to ensure that the mix of chemicals is even and consistent throughout the application. Suppose the system can detect improper mixing or improper operation. In that case, the system shuts down automatically to avoid poor product distribution, allowing the operator to fix the issue rather than applying the wrong product.

Polyurea and foam chemicals are required for an optimum temperature of between 100 to 180 degrees F. Primarily, heaters warm the chemicals to required temperatures, and the hoses heated by them maintain the temperature set point to ensure the highest quality foam is added through these high-end hydraulic systems.

For applications requiring large areas, like coating large rooftops, using the hydraulic device for spray foam has proven to be extremely efficient, with the highest heat output and efficiency.

Electric Machines

Electric spray systems provide outstanding performance when high throughput is required in a coating and spray foam application task and are ideal for those looking for polyurea equipment to sell.

Electric machines can be advantageous due to their ability to maintain consistent pressure while activated. The spray or coating applicator is turned on to maintain the proper stall pressure levels even when the machine is turned on but is not in operation.

Motor control technology ensures that both mixing pumps have the same volume of fluid pressure and regulates the motor’s electric current. Pumps and applicator orifices are alike in size. Therefore, the two pressures on the pumps have to be similar to ensure a 1:1 chemical ratio. Modern technology will stop operation if pump pressures begin to drop out of sync and begin to lose equilibrium, preventing an individual from spraying poor foam or coating and causing an error notifying the user of the reason behind the shutdown.

The heating component of electric machines is also extremely useful. To function, the electrical spray foam systems heat the chemicals until they reach their required heating point using huge primary heaters. Although most contractors depend on hoses to keep the product’s temperatures when sprayed in colder temperatures, they can cause insulated hoses to cool and cause them to have to be warmed up before retaining heat. If the machines had been off for a prolonged time before the hoses reached the point that they could keep the temperatures necessary for heat retention, an enormous amount of time could have been lost.

Electric systems are reliable and can have long longevity if properly maintained. These systems have been proven to last from 15-20 years. They’re an investment, and maintenance can be costly, but they will be more affordable than purchasing a fresh piece of machinery.


If you’re looking for either used or new polyurea spray equipment available for sale, there are plenty of options suitable for all kinds of projects in this. If you want to purchase an available polyurea spray machine, look into options like the PMC polyurea machine and the Graco polyurea device. Suppose you want spray foam insulation, too; think about Graco and PMC foam machines.

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