Introducing the Graco 17H873 Pump Cylinder, engineered to optimize performance on heavy-duty airless sprayer setups. This rugged replacement component delivers consistent pumping power for demanding applications, ensuring fast delivery of professional coatings with uniform finish quality. Crafted from hardened stainless steel for extended service life, it excels in continuous use and precise finish on vertical surfaces or overhead projects. Refer to the Graco Sprayer Parts Diagram to verify compatibility with your equipment and maintain a seamless workflow when performing routine maintenance or component swaps.
Upgrade your rig with confidence using this essential part in your arsenal of Graco Airless Spray Guns. Perfect for contractors who need reliable performance under continuous heavy loads, it supports sustained high-output operation and minimizes downtime on-site. Enhance efficiency on every job while preserving the integrity of your airless spraying system.
The Graco 17H873 Pump Cylinder stands as a pivotal component in high-pressure airless sprayer systems employed in professional coatings and large-scale architectural finishing. Designed as a direct replacement for the TexSpray Mark X and TexSpray 7900 HD ProContractor models, this cylinder assembly is engineered for sustained operation under continuous high-pressure cycles. Precision machined from premium stainless steel alloy and finished to sub-micron surface roughness levels, it ensures optimal graco pump kit integration, minimizing mechanical wear and maximizing pump efficiency. Advanced dynamic seal platforms deliver enhanced seal longevity, while compatibility with a broad range of fluids and additive chemistries supports versatile coating formulations. This engineering marvel balances acidic resistant surface treatments with robust mechanical strength to meet demanding contractor specifications across multiple applications.
Installation of the 17H873 cylinder is facilitated by precision alignment to the pump block and streamlined port configurations that support rapid maintenance turnover. Inner chamber sealing surfaces are engineered for minimal friction and to accommodate high-viscosity coatings in demanding construction or industrial environments. Compatibility with industry-standard fluid path components integrates seamlessly with high-pressure filtration modules to prevent particulate ingress and maintain consistent output pressure. Maintenance professionals will appreciate the straightforward access to O-ring grooves and port interfaces that reduce downtime and enhance overall pump efficiency.
In rigorous bench tests, the 17H873 cylinder demonstrates sustained output pressures exceeding 3300 psi with cycle rates up to 60 strokes per minute under continuous load. Empirical data shows volumetric efficiency above 95 percent across a wide viscosity range, ensuring precise material deposition for professional coatings applications. Dynamic testing under simulated field conditions validates consistent rod velocity and minimal pressure fluctuation per cycle, critical for uniform spray patterns in airless sprayer operations. These metrics underscore the cylinder’s role in high-demand scenarios where pump efficiency and repeatable output are paramount. The integrated graco piston rod coupling withstands radial misalignment without compromising seal integrity.
Manufactured from ASTM A479 grade 316 stainless steel, the 17H873 cylinder body resists corrosion and abrasive wear in solvent-based and waterborne coating systems. Internally, advanced electroless nickel plating on critical contact surfaces improves hardness to HRC 58–62, reducing micro-embrittlement and extending seal longevity. All machined surfaces undergo precision honing to achieve Ra 0.2 μm or finer, optimizing fluid film retention and minimizing galvanic interactions. The cylinder end caps and port flanges are stress-relieved via controlled thermal cycling to maintain geometric stability under 5000 psi peak pressures.
In operation, the 17H873 cylinder interfaces with system manifolds equipped with high-pressure filtration cartridges to eliminate contaminants above 5 microns. Computational fluid dynamics analysis confirms laminar-to-turbulent transition zones are minimized within the port geometry, reducing cavitation risk at peak pressures. Precision port alignment aligns directly with standard pump suction assemblies and graco spray hose connectors to ensure seamless fluid transfer. Flow simulations under variable viscosity profiles show pressure drop across the cylinder remains under 150 psi at 2 gallons per minute, supporting stable spray fan widths in professional coatings applications.
Routine maintenance of the 17H873 cylinder focuses on periodic seal inspections and lubrication schedules to maximize operational life. Specified fluorocarbon O-rings and PTFE backup rings resist chemical attack from a wide spectrum of solvent- and water-based coatings. Detailed service manuals recommend extraction of the cylinder assembly every 5000 cycles for dimensional verification and surface integrity assessment. Proper torque sequencing on housing bolts ensures uniform compression of dynamic seals, directly impacting seal longevity and preserving consistent pump efficiency in high-demand airless sprayer applications.
Through integration in TexSpray Mark X and HD ProContractor pump assemblies, the Graco 17H873 Pump Cylinder delivers a reliable foundation for industrial and commercial spraying operations. Its balance of material robustness, precise machining tolerances, and advanced surface treatments contributes to long service life and uninterrupted production cycles. Operators benefit from predictable performance during large-area coating tasks, while maintenance teams appreciate accessible design features for rapid refurbishment. By aligning with stringent engineering standards for high-pressure filtration and dynamic load handling, the 17H873 underscores Graco’s commitment to excellence in airless application technology.
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