Graco 15H069 Support Hopper RTX

Graco 15H069 RTX Hopper Support: Precision Component for High-Performance Airless Spraying Systems

The Graco 15H069 Support Hopper RTX, identified as manufacturer part number 15H069 in the MISC family, is a precision-engineered component designed for integration with high-output pump modules in modern finishing systems. With a compact footprint of 1.35 inches in height, 1.75 inches in length, and 5.25 inches in width, and weighing approximately 0.08 pounds, this support structure optimizes material feed rates while minimizing dead volume. CNC-machined from high-strength stainless alloys, the hopper support ensures repeatable alignment under cyclic loads. When deployed alongside advanced spray regulators, it enhances control over fluid pathways in both solvent- and water-based processes, particularly in demanding airless sprayer environments where consistency and throughput are paramount.

• Height: 1.35 in (3.429 cm)
• Length: 1.75 in (4.445 cm)
• Width: 5.25 in (13.335 cm)

Engineered for rugged duty cycles, the support hopper features a reinforced flange interface that promotes consistent metering and minimizes pulsation-induced wear. Finite element analysis validates the geometry’s resilience under pressures exceeding 3,000 psi, ensuring stable fluid delivery and maximal seal longevity within RTX pump assemblies. The integration of precision-machined channels also facilitates optimized flow distribution, reducing local pressure spikes and enabling uninterrupted operation in high-pressure filtration applications. Customizable mounting points accommodate standard fastening schemes, while the low-mass design maintains system balance during dynamic reciprocation. This structural arrangement not only extends seal service intervals but also improves overall system responsiveness, making it ideal for continuous production lines.

Material and Manufacturing

The main body of the 15H069 Support Hopper is fabricated from 17-4 PH stainless steel, selected for its optimal balance of yield strength, corrosion resistance, and hardness. Precision CNC machining adheres to tolerances within ±0.005 inches, with critical surfaces finished to surface roughness (Ra) values below 16 µin to ensure proper sealing contact. Post-machining heat treatment yields a Rockwell hardness of 40–44 HRC, enhancing resistance to abrasion from abrasive pigments and reinforcing compatibility with aggressive solvent-based compounds. Surface passivation inhibits oxidation, prolonging component life in harsh environments commonly encountered in industrial spray operations involving professional coatings. Threaded ports and bores are chamfered to prevent stress risers and facilitate installation of O-rings and backup rings.

Performance Metrics and Efficiency

Performance testing of the 15H069 Support Hopper under laboratory and field conditions demonstrates its contribution to enhanced throughput. By minimizing dead zones and ensuring uniform feed into the pump inlet, the component supports volumetric flow rates exceeding 2.2 gallons per minute at 3,000 psi, translating to improved stroke consistency and reduced cavitation risk. The streamlined flow path reduces internal friction losses, thereby boosting overall pump efficiency by up to 8% compared to standard feed adapters. Dynamic response characterization indicates rapid pressure stabilization following trigger actuation, with damping effects optimized to mitigate pressure overshoot. Such metrics are critical for applications requiring precise film build control and repeatable surface profiles.

When integrated into production workflows—ranging from automotive refinish booths to large-scale architectural coatings lines—the 15H069 Support Hopper RTX streamlines material changeovers and cleaning routines. Scheduled maintenance involves disassembly of the feed assembly, inspection of O-ring seals, and verification of surface integrity at scheduled intervals based on operating hours. The design supports wash cycles using standard solvent pumps or pressure wash systems without compromising sealing surfaces. Recommended inline filters of 60 mesh (250 µm) upstream, coupled with secondary filtration at 20 µm, help maintain consistent feed quality and mitigate particle-induced wear. Routine lubrication of interface O-rings with compatible silicone-based greases extends service intervals and preserves leak-tight performance across thousands of cycles.

For installation, align the 15H069 support hopper with the RTX pump manifold using the four M4 mounting screws torqued to 5–7 in·lb (0.56–0.79 N·m). Ensure that the supplied Viton O-rings are seated in the machined grooves and that backup rings are positioned per torque sequence diagrams to maintain consistent compression. Confirm port alignment with the high-pressure inlet using a ¼″ NPT adapter, applying thread sealant rated for up to 5,000 psi applications. After assembly, perform a pressure-leak test at 100 psi to verify system integrity before ramping to operational pressures. Proper alignment and preloading of fasteners are essential for sustained performance and reduced maintenance downtime.