The Graco 119636 Piston Wiper delivers precision sealing and extends the service life of your airless sprayer, ensuring smooth operation when applying professional coatings. Crafted from durable materials, this replacement part minimizes wear and maintains consistent performance under heavy workloads. Perfect for maintenance routines, it optimizes pump efficiency and prevents fluid bypass for reliable coating results every time. Its precision tolerance reduces overspray and ensures consistent flow across varying viscosities.
Designed to replace part 198303, this piston wiper supports high-pressure filtration systems and reduces downtime with fast installation. Compatible with popular Graco models like the Ultra Max II 1895 and more, it ensures your equipment stays ready for any project. Keep your sprayer operating at peak performance and achieve flawless finishes with minimal maintenance.
$9.76The Graco 119636 Piston Wiper (Replaces part #198303) is engineered to optimize seal integrity within high-pressure pump systems used in advanced airless sprayer platforms. This precision module acts as a contaminant barrier, scraping residual coatings and particulate matter from the piston rod before reentry into the primary chamber. It maintains optimal pump efficiency across extended duty cycles, ensuring consistent fluid delivery for professional coatings applications. Integrating seamlessly with OEM manifolds, the design features tolerances measured in thousandths of an inch for repeatable performance. By preventing abrasive particles from entering the fluid pathway, the wiper significantly extends overall pump and seal service intervals while supporting robust high-pressure filtration processes.
Featuring a multi-radius lip profile and stepped wiping geometry, this replacement unit employs an advanced synthetic elastomer compound specifically formulated for surface adherence and rapid debris evacuation. The geometry creates a hydrodynamic sealing interface that balances rod lubrication against contaminant exclusion, maximizing piston cycling performance and delivering extended seal longevity. As an integral component in high-pressure filtration systems, the module mitigates build-up at inlet ports and reduces downtime associated with abrasive particle ingress, ultimately preserving the integrity of downstream check valves and seat assemblies under sustained 3,000–4,000 psi operating conditions.
In industrial spraying, automotive refinishing, and large-scale architectural coating operations, the 119636 wiper supports continuous production workflows. When paired with an airless sprayer, it ensures smear-free substrate coverage by maintaining consistent fluid pressure and eliminating backflow contamination. Within professional coatings environments, its robust design tolerates cyclic temperature excursions from –20 °C to +80 °C and repeated exposure to solvent-based, waterborne, and two-component formulations. Field technicians appreciate its drop-in compatibility, which reduces mean time to repair and aligns with preventive maintenance strategies focused on minimizing unscheduled service intervals in high-throughput finishing lines.
Constructed from a proprietary blend of nitrile-butadiene elastomer (NBR) with a polyether urethane backing, the component exhibits excellent abrasion resistance and chemical stability against common coating solvents. Reinforced with a PTFE-infused wipe lip, the element offers a low dynamic friction coefficient (<0.15) against polished stainless-steel rods, ensuring minimal actuation torque. Precision molding maintains radial tolerance within ±0.003 in (±0.076 mm), preserving consistent extrusion thickness throughout the circumference. The design enhances seal longevity by distributing rod loading evenly and preventing localized material fatigue under repetitive high-pressure pulsations typical of professional finishing applications.
Comprehensive laboratory evaluations include cycle life testing exceeding 200,000 reciprocation strokes at 3,500 psi and ambient temperature. Pressure burst trials demonstrate structural integrity beyond 5,000 psi, while extended soak tests in 25% solids coatings mixture validate chemical resistance and dimensional stability. High-pressure filtration assessments confirm that the module reduces particulate ingress by over 90% when integrated upstream of the main valve pack. Additional metrics track frictional wear rates below 0.02 mm³ per million cycles, underscoring its role in maintaining consistent fluid dynamics and pump efficiency in demanding spray environments.
For optimal performance, technicians should install the component with a calibrated torque tool, aligning the wiper lip flush to the gland housing to prevent extrusion under load. Periodic inspection during scheduled maintenance intervals enables early detection of wear patterns and ensures uninterrupted coating operations. Minimal lubrication with silicone-based service fluid can further reduce dynamic friction without compromising hydrostatic sealing. The design’s modular footprint and drop-in form factor simplify field replacement, reducing machine downtime and sustaining continuous, high-quality results in demanding industrial and commercial finishing applications.
In summary, this precision-engineered replacement module delivers exceptional wear resistance, contamination control, and sustained pump efficiency for professional spraying systems. Its rigorous material selection and validated performance metrics guarantee reliable operation within high-pressure filtration networks, making it an indispensable component for advanced finishing workflows.
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