Graco 122486 O-Ring Packing 013

High-Precision Graco 122486 O-Ring Packing 013 for Industrial Pump Sealing Applications

Overview

The Graco 122486 O-Ring Packing 013 series represents a precision-engineered sealing solution tailored for high-pressure pump environments and fluid handling systems. Developed for demanding industrial contexts such as chemical processing, painting and coating lines, and oil and gas transfer, this O-ring packing module integrates seamlessly into piston and diaphragm pump assemblies. Critical design considerations address dynamic reciprocating motion, extreme temperature fluctuations, and abrasive media exposure. Engineered to maintain consistent compression set and extrusion resistance, the seal assembly enhances airless sprayer performance across a spectrum of modern finishing equipment. Its streamlined geometry reduces frictional losses and contributes to optimized flow paths, making it indispensable for professional coatings operations that demand uniform film thickness and minimal downtime. Integration with Graco TR1 and TTi models allows direct retrofits. The seal stack resists extrusion through IP8 rated bleeder valves and supports sub-micron interfacial film thickness. Engineered for compliance with FDA food-grade standards.

• Custom elastomeric polymer blends for compatibility with solvents, resins, and waterborne formulations
• Precision tolerance control (±0.02 mm) for consistent axial compression and radial sealing
• Modular O-ring packing stack design for rapid maintenance and interchangeability

Material Composition

Manufactured from a proprietary nitrile rubber compound, the Graco 122486 packing features enhanced chemical resistance and low-temperature flexibility. Additive packages incorporated into the elastomer matrix deliver improved UV and ozone resistance, mitigating premature embrittlement in outdoor and high-altitude installations. The packing stack employs alternating O-ring and wear ring profiles to balance sealing resilience and dynamic stability. Elastomer hardness targets 75±5 Shore A with tensile strength above 15 MPa and elongation over 200%. Compression set remains under 10% after 72 hours at 100 °C. Chemical compatibility matrix covers acids, alkalis, solvents such as toluene and MEK. Compatibility testing under ASTM D2000 protocols validates the product’s suitability for a broad range of hydraulic fluids, lubricants, and specialty solvents used in architectural and automotive professional coatings applications. These materials ensure minimal swell and maintain dimensional integrity, even under sustained cycles in high-pressure filtration loops or recirculation systems.

Performance Metrics

Rigorous testing under ISO 9001 quality management reveals the 122486 packing’s capacity to withstand pressures up to 3,500 psi and temperatures ranging from -40 °C to 150 °C. Dynamic friction coefficients remain below 0.12 in reciprocating assemblies, reducing energy loss and transient vibration. Leakage testing under ISO 5599-1 yields less than 0.01 mL/min per seal at 3,000 psi. Mean time between failures (MTBF) exceeds 2,000 hours in 120 strokes-per-minute operation. The seal assembly endures over one million operational cycles with less than a 5% change in leak rate when evaluated per API 674 standards. In droplet-size analysis for spray applications, the optimized seal clearance contributes to consistent atomization and minimal overspray. Field data confirm notable improvements in pump efficiency across both gear and piston pump platforms, translating to lower power consumption and extended service intervals. Acoustic emission monitoring confirms low chatter and stable performance under cyclic loads.

Design Details

The Graco 122486 employs a tandem seal configuration with a back-up ring to prevent extrusion under high differential pressures. Cross-sectional profiles are machined to an exacting 0.5 mm lip thickness, ensuring uniform radial contact and low breakaway torque. Tight dimensional tolerances facilitate quick upgrades in existing pump housings, eliminating the need for bore rework. Thermal expansion coefficients are matched between housing alloy and elastomer to minimize thermal cycling stress. Manufactured via precision compression molding, each seal component undergoes CNC machining to achieve Ra <0.4 µm surface finish. Post-mold curing in autoclave ovens ensures crosslink density uniformity. 100% laser scanning gauge inspection verifies profile accuracy. Combined with dynamic balancing in rotor-stator clearances, the design extends seal longevity in abrasive or particulate-laden fluids. Modular assembly allows for incremental performance upgrades by substituting wear-resistant inserts without full seal replacement.

Usage Insights

For optimal installation, technicians should verify gland parallelism and apply a thin layer of compatible lubrication to the O-ring surfaces to prevent twist and roll. Torque values on gland bolts are specified per Graco service manuals to maintain uniform compression across the packing stack. Routine inspection intervals of 500 operating hours are recommended, focusing on extrusion lips and backup ring wear. When decommissioned, the component can be inspected for hardness changes using Shore A durometer readings, ensuring that material properties remain within design limits. Storage guidelines call for 12-month shelf life in climate-controlled environments (20 °C, 40% RH). Installers should use parallel bore gauges and spanner wrenches sized to 22 mm nuts. Color-coded packaging reduces installation errors. Maintain a 10% spare inventory for critical pumps. Proper disposal follows standard elastomer recycling practices. With this level of engineering detail, the Graco 122486 O-Ring Packing 013 delivers repeatable performance in critical fluid control and metering systems.