How Does Spray Foam Equipment Work?
Generally speaking, spray polyurethane foam (SPF) is applied using commercially available high-pressure, plural-component proportioning technology. Alternatively, SPF can be applied using low-pressure, two-component pressurized kits, or single-component cans for smaller applications.
SPF equipment is integral to the entire process of applied spray foam: from transferring the components out of the 55 gallon material drums, to properly heating and pressurizing the materials, to pumping them through hoses, to finally mixing and spraying the components.
The two components that combine to make spray polyurethane foam (SPF) (Side A: isocyanate, and Side B: polyol resin) are typically supplied in 55-gallon drum sets, which must be shipped and stored according specific procedures. Once in use on the job site, they are transferred from the drums to the proportioning machine via specialized transfer pumps.
Spray foam machines have two metering, or proportioning, pumps (one for each component) that heat and proportion the isocyanate and polyol in a 1:1 ratio. The two materials move through the machine (commonly referred to as a proportioner) starting at the proportioning pumps, through the primary heaters, through the heated hoses, and out to the spray gun. The isocyanate and polyol resin materials are kept separated through the entire system until they come together in the spray gun, where they are mixed and spray-applied to the target substrate.
Read more: Spray Foam Equipment Guide