The Graco 115078 O-Ring Packing ensures reliable performance and leak-free operation in your pump assemblies. Designed for compatibility with Graco airless systems, this precision replacement delivers consistent flow and helps extend service life under demanding conditions. Ideal for professional coatings applications, the packing is molded from premium elastomers that resist wear and abrasion, maintaining seal integrity over repeated cycles. Upgrade your maintenance routine with this essential component for any airless sprayer.
Engineered for use in high-demand environments, this O-Ring packing provides durability under high-pressure filtration cycles and helps minimize downtime. The compact and robust .15 inch profile ensures a snug fit within Graco pump housings, while resistance to chemicals and temperature fluctuations guarantees consistent operation. Whether you’re servicing spray rigs or integrating into preventive maintenance kits, this OEM-quality seal balances performance and longevity. Trust Graco’s meticulous engineering to support your coating workflows with precision and reliability.
$6.3The Graco 115078 O-Ring Packing serves as a critical sealing component within fluid handling assemblies, engineered to deliver maximum service life under demanding operating conditions. Manufactured from high-performance elastomeric compounds and precision-molded to millimeter tolerances, this packing is optimized for integration within pump and valve systems supporting professional fluid transfer equipment. Its compact profile, including a nominal height of 0.15 inch, length of 2 inches, and a width of 1.95 inches, ensures seamless installation in confined spaces. In industrial operations reliant on corrosion-resistant materials and consistent pressure control, the O-ring helps sustain reliable flow dynamics while contributing to enhanced pump efficiency, making it an ideal choice for advanced high-pressure coating circuits utilizing an airless sprayer platform.
The Graco 115078 O-Ring Packing is fabricated from a specialized fluorocarbon-elastomer blend that achieves exceptional chemical resistance and mechanical strength across a broad spectrum of working fluids. Its polymer matrix is optimized to withstand aggressive solvent-based paints, epoxy resins, and silicone emulsions, making it ideally suited for demanding professional coatings processes. By balancing resilience with low compression set properties, the compound maintains dimensional integrity even after extended exposure to cyclic temperature fluctuations and abrasive particulates. Additionally, the material complies with ISO 3601 dimensional standards for consistent form and fit across production lots. This advanced elastomer exhibits minimal swelling and high modulus retention, ensuring robust sealing performance in dynamic pump environments where contamination control and fluid purity are critical to overall system reliability.
In high-pressure fluid delivery setups, the O-ring has been validated through accelerated life testing to exceed 100,000 dynamic cycles at pressures up to 5000 psi. Experimental data show that leak rates remain below 1.0x10-3 ml/min under static loading conditions, while dynamic friction coefficients stay within the 0.15–0.20 range to minimize wear. This ensures consistent flow control and pressure stability in applications featuring high-pressure filtration modules and precision metering valves. Thermal degradation assessments indicate stability from -40°C to 150°C, and compatibility trials with waterborne and solvent-based media confirm negligible permeation. Cycle ramp testing under simulated operational loads confirms fatigue resistance aligned with ISO 9001 protocols.
Engineered for seamless integration, the O-ring’s controlled hardness of 70 Shore A allows for precise gland loading and uniform contact stresses across pump head surfaces. CAD-driven mold technologies ensure dimensional tolerances within ±0.02 mm, aligning perfectly with Graco pump bores and sealing grooves. Finite element analysis has been employed to model compression profiles, stress distribution, and potential distortion under transient pressure surges, informing the final cross-sectional geometry. Controlled cooling and post-mold treatments minimize internal stress development and variability. The low-profile rectangular cross-section maximizes sealing surface area while minimizing extrusion risk, thus enhancing longevity and maintaining high volumetric efficiency. Attention to microscopically smooth surface finishes further reduces friction and contributes to consistent seal performance throughout maintenance cycles.
Optimizing seal life requires routine inspection protocols and proper lubrication with compatible silicone or perfluorinated grease to prevent adhesion and hardening. Service guidelines recommend replacing the O-ring packing following any evidence of torque spike anomalies or visible nicks on seal edges. Recommended cleaning uses neutral pH detergents to preserve compound integrity over cycles. By adhering to scheduled preventive maintenance intervals, equipment operators can achieve extended seal longevity while minimizing unplanned downtime. The component’s robust construction tolerates multiple maintenance cycles without compromising sealing integrity, thereby reducing spare parts inventory and supporting uninterrupted operation in high-demand production lines.
When deployed in Graco air motor-driven diaphragm pumps or piston-style fluid end modules, the 115078 O-Ring Packing provides reliable sealing under alternating pressure cycles and rapid reciprocation. Its tight compression set characteristics facilitate fast reassembly and consistent bead shapes in finishing equipment, contributing to uniform film build when spraying lacquers, primers, or topcoats. Coupled with advanced manifold filters, the O-ring ensures stable backpressure and prevents media bypass, enhancing system responsiveness. It integrates seamlessly into robotic painting cells and multi-axis dispensing systems. Engineers specify this packing in configurations requiring precise fluid metering for industrial painting rigs and automated dispensing lines, leveraging its proven track record in heavy-duty and precision-oriented manufacturing applications.
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