Choosing a 2K Sprayer? Start With the Material
Choosing a 2K or plural-component spraying system should start with the material, not simply the pump. Two-component coatings can differ in viscosity, solids content, mixing ratio, and application requirements, so the equipment needs to be selected around the specific material and process.
A practical selection flow is simple: material → mixing ratio → pressure and flow → spraying equipment.
Start With the Material
Before selecting a sprayer, understand what you are going to apply. Check the material’s viscosity, solids content, required mixing ratio, recommended application method, and operating conditions.
This becomes especially important with high-viscosity and high-solids materials. Cosmostar positions the SD100 series for high-viscosity fluids and high-solid coatings, including epoxies, polyurethanes, and high-solids polyurethane coatings.
The goal is not to find the most powerful sprayer. It is to find equipment that matches the material requirements.
Check the Mixing Ratio
For a plural-component system, the mixing ratio is a fundamental specification. Component A and Component B need to be delivered according to the ratio required by the material manufacturer.
For example, the Cosmostar SD100 X30 uses a two-lower design with a 1:1 mixing ratio. Cosmostar describes the system as providing mixed and proportioned material on demand.
Not every 2K material uses a 1:1 ratio, so the material specification should always come first when selecting the pump configuration.
Then Look at Pressure and Flow
Once the mixing ratio is established, the next consideration is pressure and flow.
The SD100 X30 has a 30:1 fluid-to-air pressure ratio, a maximum fluid working pressure of 3,000 PSI (210 bar), a maximum air input pressure of 100 PSI (7 bar), and a maximum volume flow rate of 23.4 LPM (6.18 GPM).
These are equipment ratings, not universal operating settings. Actual operating conditions still depend on the material, spray tip, hose configuration, and requirements specified for the application.
Pressure and flow therefore need to be considered together rather than treated as isolated numbers.
Why Material Viscosity Matters
Viscosity affects how a material moves through the fluid path. A higher-viscosity material can place different demands on the pumping and delivery system than a lower-viscosity material.
This is one reason equipment selection should consider the complete fluid path, including the material supply, pump, hose, spray gun, and spray tip.
For the SD100 X30, Cosmostar specifically identifies high-viscosity fluids and high-solid coatings among the intended fluid categories.
Look at the Complete Fluid Handling System
A plural-component pump does not work in isolation. The material still has to travel through the system before reaching the surface.
A typical process looks like:
Component A + Component B → Pumping & Proportioning → Fluid Delivery → Spray Gun → Application Surface
Each stage needs to be compatible with the material and the application requirements.
Hose dimensions, fittings, spray tips, and material supply conditions can all become part of the equipment-selection discussion. Looking only at the pump specification can therefore give an incomplete picture of the application setup.
Where SD100 X30 Fits
The Cosmostar SD100 X30 is a 1:1 plural-component pump designed around applications involving plural-component materials. Cosmostar lists applications including plural-component materials and foam insulation, with typical fluids handled including epoxies, polyurethanes, and high-solids polyurethane coatings.
Its main pump uses a 10-inch ATLAS air motor, with a 30:1 pressure ratio and 1:1 mixing configuration. The system is also designed for gravity feed, which Cosmostar notes may eliminate the need for separate feed pumps in suitable setups.
These specifications give the SD100 X30 a defined position within a plural-component fluid handling system, particularly where the application calls for a 1:1 configuration.
A Better Way to Select a 2K Sprayer
Instead of starting with a product catalog, work backward from the material.
First, identify the material characteristics. Then confirm the required mixing ratio. After that, determine the required pressure and flow. Finally, make sure the entire fluid path—from material supply to spray tip—is compatible with the application.
This approach is more useful than asking which sprayer has the highest pressure.
The better question is:
Does this system match the material and the application requirements?
For a 1:1 plural-component application, the Cosmostar SD100 X30 provides a defined equipment configuration: 1:1 mixing ratio, 30:1 pressure ratio, up to 3,000 PSI fluid working pressure, and up to 6.18 GPM flow rate.
In industrial coating, the right equipment starts with understanding what you are trying to spray. Start with the material, then build the system around it.
For your 2K or plural-component spraying requirements, contact sales@cosmostar.net for inquiries and to discuss the equipment setup for your material and application.