Spra-Cube UE Ultra Efficiency Paint Arrestors

Name: UE Ultra Efficiency
Brand: RTT Finishing Solutions

Ultra Efficiency Cube Filter. Difficult Coatings. High Volume.

The RTT Spra-Cube Ultra Efficiency (UE) Series is the highest-efficiency model in the Spra-Cube lineup, engineered for high-volume finishing systems that use paints and coatings difficult to filter with standard filter products. Using the same 20″ × 20″ × 15″ extended-surface cube geometry as the SE and HE, the UE delivers the highest average removal efficiency in the Spra-Cube family – 99.48% – confirmed by independent testing from LMS Technologies, Inc. It is purpose-built for operations where filter media performance is critical and standard efficiency products fall short.

The UE achieves an initial pressure drop of 0.05 in. wg on a clean filter – matching the HE – and rises to 0.09 in. wg at full load, a modest increase that keeps airflow and fan performance stable throughout the service life of the filter. Paint holding capacity is 3,798 grams (8.3 lb.), slightly below the SE and HE at 8.7 lb., reflecting the tradeoff between the higher-density filter media required for ultra efficiency performance and raw holding capacity. Constructed from multiple layers of RP’s proprietary paper Paint Arrestor media and synthetic backings.

Features

Extended-surface cube design: 20″ × 20″ × 15″ three-dimensional geometry
Multiple layers of RP proprietary paper Paint Arrestor media with synthetic backings
Initial pressure drop (clean filter): 0.05 in. wg
Final pressure drop (loaded filter): 0.09 in. wg
Paint holding capacity: 3,798 grams = 8.3 lb.
Average removal efficiency: 99.48%
Designed for high-volume systems using paints and coatings difficult to filter with standard products
Highest removal efficiency in the Spra-Cube lineup
Tested by LMS Technologies, Inc.

Benefits

Capture the highest percentage of paint overspray in the Spra-Cube lineup – 99.48% average removal efficiency under independently tested conditions.
Filter coatings that standard filter products struggle with – the Spra-Cube UE is specifically engineered for paints and coatings that are difficult to arrest with medium or high efficiency media.
Maintain consistent airflow as the filter loads – the pressure differential between clean (0.05 in. wg) and fully loaded (0.09 in. wg) remains low and manageable, keeping fan performance stable throughout the service life.
Extend filter service intervals beyond flat pad filter alternatives – the 8.3 lb. paint holding capacity far exceeds W-Series flat pad filters, reducing changeout frequency on high-volume lines.
Fit the same booth frame as the Spra-Cube SE and HE – the 20″ × 20″ × 15″ cube dimensions are identical across all three Spra-Cube series, allowing direct substitution without structural modification.

Test Data

Performance testing was conducted by LMS Technologies, Inc. under the following conditions:

Test Parameter	Value
Paint Description	High Solids Baking Enamel (S.W. #1 Permaclad 2400, red)
Paint Spray Method	Conventional Air Gun at 40 PSI
Spray Feed Rate	143 grains/min. (135 cc./min.)
Air Velocity	150 FPM
Initial Pressure Drop (Clean Filter)	0.05 in. wg
Final Pressure Drop (Loaded Filter)	0.09 in. wg
Paint Holding Capacity	3,798 grams = 8.3 lb.
Average Removal Efficiency	99.48%

Testing conducted by LMS Technologies, Inc.

Spra-Cube Series Comparison

All three Spra-Cube models share the same 20″ × 20″ × 15″ extended-surface cube geometry and fit the same booth frame without structural modification. Choose based on your efficiency requirements and coating type.

Specification	Spra-Cube SE Medium Efficiency	Spra-Cube HE High Efficiency	Spra-Cube UE Ultra Efficiency
Performance
Avg. Removal Efficiency	98.81%	99.41%	99.48%
Paint Holding Capacity	3,941 g / 8.7 lb.	3,941 g / 8.7 lb.	3,798 g / 8.3 lb.
Pressure Drop
Initial (Clean Filter)	0.02 in. wg	0.05 in. wg	0.05 in. wg
Final (Loaded Filter)	0.03 in. wg	0.06 in. wg	0.09 in. wg
Pressure Differential	0.01 in. wg	0.01 in. wg	0.04 in. wg
Physical
Cube Dimensions	20″ × 20″ × 15″	20″ × 20″ × 15″	20″ × 20″ × 15″
Construction	Multi-layer RP paper + synthetic backings	Multi-layer RP paper + synthetic backings	Multi-layer RP paper + synthetic backings
Booth Frame Compatible	Yes	Yes	Yes
Best For
Ideal Application	High-volume lines where maximum holding capacity and lowest cost per changeout is the priority	High-volume lines requiring above-average efficiency without sacrificing service interval length	High-volume systems using paints and coatings that are difficult to filter with standard products

“In my opinion, the most important thing to consider when buying equipment is having a partner who can get the job done. Anyone can sell you something, but RTT had the willingness to make sure it all came together and did exactly what we needed it to do.”

“RTT provided the right-side downdraft solution and saved us significant costs by eliminating the need for an in-ground pit. The booth has performed great, and our painters are very happy with it.”

“Our plant will enjoy increased output, less rework, improved drying times, fewer delays and fewer defects, while helping to create a highly efficient and employee-friendly workplace.”

3000 Standard

The 3000 Standard RP Arrestor Series offers reliable overspray capture for general coating applications - compatible with multiple spray methods and built with eco-conscious, degradable materials.

3100 Standard High Capacity

The 3100 Standard High Capacity RP Paint Arrestor Series is built for high-production environments and compact booths - optimized for heavy, tacky coatings and slower-drying finishes.

3200 Spra-Gard High Efficiency

The 3200 Spra-Gard High Efficiency RP Arrestor Series provides durable, single-stage overspray capture for most applications with a polyester-backed design. Available in pads or rolls.

3300 Spra-Gard High Efficiency

The 3300 Spra-Gard High Efficiency RP Arrestor Series offers peak overspray capture with high-density polyester backing, delivering superior, single-stage performance for most applications.

3400 Spra-Gard High Capacity High Efficiency

The 3400 Spra-Gard High Capacity High Efficiency RP Arrestor Series delivers peak efficiency and extended service life - purpose-built to reduce downtime in high-production environments.

3600 Spra-Gard High Capacity High Efficiency

The 3600 Spra-Gard High Capacity High Efficiency RP Arrestor Series delivers 3200 Series efficiency with extended filter life, engineered for high-production operations where uptime is critical.