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3M Series 2.0 Type 21 Adapter connects C.A. Technologies spray equipment to the 3M PPS (Paint Preparation System), so paint liners, lids, and the spray gun work together as a closed system. This adapter mounts the PPS lid directly to the spray gun, tying the liner bag and filter to the gun in one assembly for a controlled spray setup. As paint is dispensed through the adapter, the PPS liner bag collapses, allowing the gun to operate at any angle during real-world spraying. With this design, only the spray gun and adapter need to be cleaned after use, which reduces cleanup steps and keeps focus on spraying rather than handling extra mixing cups and filters.
This C.A. Technologies CA91-573 adapter mounts between the spray gun and the 3M PPS Series 2.0 cup system, tying the gun body to the PPS lid and liner assembly. The four-point connection between adapter and lid provides a stable interface, helping the cup stay aligned while the gun is moved, angled, or rotated during spraying. The quarter-turn lid-locking system used with this adapter allows the lid to be locked or released quickly, which is useful when changing out liner bags or switching materials. With the larger fluid passage opening designed into the Series 2.0 adapter and lid, material flows more freely from the PPS cup into the gun, supporting higher throughput in typical spray workflows. By relying on disposable liner bags and filters, this adapter focuses cleaning on the spray gun and adapter surfaces that contact material.
The 3M PPS Paint Preparation System uses liner bags that sit inside standard hard cups, and this Type 21 adapter is the link that fastens that system to the spray gun. Paint is mixed directly in the liner bag, using measurements printed on the standard hard cup to guide ratios, so material preparation happens in the same container that will go on the gun. Once the PPS lid with integrated filter is placed on the cup, the adapter connects the lid to the spray gun, so paint is filtered right before entering the gun passage. As paint is drawn through the adapter, the liner bag collapses, which allows spraying at any angle without uncovering a pickup or vent, so overhead or tight-angle work can proceed without changing the way the cup is held.
This PPS layout means the adapter becomes the fixed bridge between the disposable components and the gun, allowing liner bags and filters to be discarded after use while the adapter and gun are retained. The direct filter-to-adapter connection helps maintain a clean flow path into the spray gun, supporting consistent spray quality as the bag empties. Because the system eliminates separate mixing cups and filters, material stays in one closed path from mixing through spraying, reducing handling steps around the booth or shop.
The four-point connection between the Series 2.0 adapter and lid adds stability where the cup meets the spray gun, which matters when moving around large parts, doors, or panels that require frequent gun repositioning. This more secure engagement helps keep the cup seated when the gun is angled or rotated. The quarter-turn lid-locking system used with this adapter allows the PPS lid to be secured or removed with a short rotation, reducing the time needed when changing liner bags between colors or materials. For shops handling multiple small batches, that quick-turn action keeps the gun back in service faster after each change.
The larger fluid passage opening in the adapter and lid increases the available cross-section for material flow into the gun, supporting higher output when using settings or techniques that rely on more material delivery. This can shorten passes over larger surfaces where coverage rate matters. Since the PPS standard hard cups have measurements printed directly on the plastic, material can be measured and mixed accurately in the same cup that will attach through this adapter to the spray gun, streamlining the path from mix to spray. With liner bags and filters treated as disposable in the PPS system, this CA91-573 adapter remains a central reusable part of the setup, so maintaining it and the gun keeps the overall system ready for repeated daily use.
The 3M Series 2.0 Type 21 Adapter works with the 3M PPS (Paint Preparation System), creating a closed paint system that connects the PPS cup, liner, and filter directly to the spray gun.
The adapter mounts between the spray gun and the 3M PPS lid, using a four-point connection and quarter-turn lid-locking system so the cup assembly locks securely to the gun during spraying.
The larger fluid passage opening in the Series 2.0 adapter and lid allows more material flow into the spray gun, supporting higher output when faster coverage or heavier application is desired.
The collapsing PPS liner bag feeds paint through the adapter as volume drops, allowing the spray gun to function at any angle, which supports overhead, vertical, or low-position spraying.
In the PPS system, liner bags and filters are disposable, so cleaning focuses on the spray gun and the adapter surfaces that contact material, keeping cleanup concentrated on reusable components.
Standard PPS hard cups have measurements printed on the plastic, so materials can be measured and mixed accurately in the same cup that will mount to the spray gun through the adapter.
The 3M Series 2.0 Type 21 Adapter from C.A. Technologies ties the spray gun directly into the 3M PPS closed paint system, using the CA91-573 design to support stable mounting, quick quarter-turn lid changes, and increased material flow for demanding spray work.