Ensure reliable performance in demanding applications with the Graco 156593 O-Ring Packing. Designed to seal critical components in proportioners like ProMix™ Easy and Xtreme Mix™ 185, this precision-engineered seal protects against leaks under intense pressure. Integrate this pump part into your setup to optimize maintenance schedules and minimize downtime on job sites. Compatible with a variety of Graco systems, it delivers consistent results for continuous operation in high-pressure filtration scenarios, elevating your productivity in any airless sprayer setup.
Manufactured from durable elastomer materials, the 156593 packing ensures long-lasting resilience against chemical exposure and abrasive media often found in industrial spraying operations. Whether servicing ProMix™ II proportioners or hybrid cover-mounted pumps, this O-ring is engineered to maintain optimal sealing under continuous cycles. By incorporating this component into preventive maintenance routines, technicians can uphold the integrity of spray systems and achieve consistent finish quality across various applications, especially when applying professional coatings.
$19.64Graco 156593 O-Ring Packing is a precision engineered sealing element designed to maintain leak-free performance under demanding flow conditions. Found in Graco ProMix™ Easy, Xtreme Mix™ 185, and ProMix™ II proportioners as well as cover-mounted feed pump assemblies, this O-ring ensures consistent pressure retention and fluid separation in advanced mixing circuits. Manufactured to tight tolerances, it supports consistent stroke cycles and prevents cross-contamination of resinous materials. When integrated into a high-volume airless sprayer configuration, the 156593 O-Ring optimizes spray pattern stability and system responsiveness at varying pressure levels.
Designed for robust fluid handling, the 156593 packing ring operates effectively in pressure regimes exceeding 3000 psi, interfacing seamlessly with advanced high-pressure filtration units to maintain contaminant-free flows. Its geometry minimizes dead volume, which reduces purge times and enhances circulation efficiency. By maintaining stable seal contact without excessive friction, it contributes directly to pump efficiency and reduces motor load during intermittent and continuous duty cycles. This efficiency improves energy utilization in large-scale spray and proportioning operations. In conjunction with inline pulsation dampeners, this O-ring minimizes pressure spikes, enabling stable dosage control in cyclic operations. Its compatibility with alternative backup rings allows custom high-viscosity filtration modules to operate without bypass.
The O-ring’s material chemistry features a nitrile-based elastomer blend with optimized shore A hardness, offering a working temperature range from -30 °C to 120 °C. The vulcanization process and smooth inner bore finish minimize extrusion risks, even when exposed to solvent-borne and waterborne chemistries. The controlled durometer ensures minimal shape deformation over extended service intervals, directly impacting seal longevity in high-cycle applications. Its resilience under thermal cycling prevents permanent set and maintains radial compression over millions of actuation events. Testing per ASTM D2000 confirms compatibility with a range of solvents including acetone, xylene, and aliphatic glycols, and resistance to aliphatic amines and low molecular weight alcohols. Nitrogen pressurization aging tests show minimal modulus change after 500 hours at elevated temperatures.
In complex mixing and spray systems, consistent seal performance is vital for delivering uniform coating thickness and color accuracy. The 156593 O-Ring Packing is widely deployed in industrial paint lines, adhesive dispensers, and injection molding feed systems. It supports the precise metering of two-component materials, enabling formulators to achieve exact ratios essential for critical structural and corrosion-resistant formulations. When integrated into modular manifold blocks, the O-ring supports custom channel geometries and quick-change valve cartridges, enabling rapid color and material changeovers. This flexibility reduces downtime during batch transitions in automotive, aerospace, and marine coating lines, enhancing overall throughput for professional coatings.
Installation of the 156593 component requires adherence to precise gland tolerances and appropriate lubrication protocols. Technicians should apply a thin film of compatible grease—free of silicone—to ease seating and minimize friction during initial cycles. Calibration of gland compression torque ensures consistent radial pressure without overstressing the elastomer. Regular inspection intervals aligned with pump maintenance schedules help detect early signs of wear, such as shallow surface abrasions or slight extrusion. Replacing the O-Ring before critical tolerance thresholds are exceeded prevents unplanned downtime and preserves overall system integrity.
Performance metrics for this O-Ring include a dynamic friction coefficient below 0.20 in cyclic use, a volumetric leakage rate under 0.01 cc/min at 2500 psi, and a compression set of less than 15 % after 72 hours at 100 °C. These values support high-demand industrial environments where equipment uptime and fluid purity are paramount. By selecting the Graco 156593 O-Ring Packing, engineers optimize pump-driven proportioning rigs with improved continuity of system pressure, enhanced service intervals, and reduced maintenance overhead, ensuring reliable productivity across diverse coating and mixing applications.
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