The Graco 123739 Flared Fitting Seal offers a precision-engineered connection designed for durability in demanding industrial fluid handling tasks. Ideal for use with a airless sprayer. This specialized component ensures a secure seal in high-volume spray equipment, reducing the risk of leaks and maintaining consistent performance. Crafted from top-grade materials for long-lasting service life. Performance comes backed by Graco’s trusted engineering heritage.
Whether upgrading industrial spray lines or enhancing specialty applicators, the Graco Flared Fitting Seal integrates seamlessly into professional setups, offering superior leak prevention and easy maintenance. Its robust construction stands up to abrasive chemicals and challenging environments, making it essential for applications requiring professional coatings and refined material delivery. The unique flared design supports efficient flow, while compatibility across Graco pump systems guarantees optimal function. Trust this fitting seal to uphold operational efficiency and extend equipment lifespan under continuous, high-pressure filtration scenarios.
$16.17This document details the Graco 123739 Flared Fitting Seal, engineered for exceptional sealing integrity in compact fluid circuits with rigorous dynamic requirements. The unique flared interface geometry ensures uniform compression of the PTFE-based sealing element, minimizing micro-leakage under extreme cycling. Precision machining of stainless steel components yields consistent concentricity and optimized surface finish, reducing wear and improving thermal stability. The compact 0.3 x 0.6 x 0.6 inch footprint integrates seamlessly into tight manifolds or cartridge housings within a high-flow design, supporting advanced pump assemblies such as the airless sprayer series commonly used in industrial finishing and lubrication systems.
The Graco 123739 incorporates a flared seal fitting design meeting ISO 8434-1 standards, using a 45-degree conical compression face to produce a uniform radial contact profile. The male and female bodies are machined from bar-stock stainless steel 316L with tolerances of ±0.025 mm, followed by electropolishing to achieve surface roughness below 0.4 µm. A carbon-reinforced PTFE composite serves as the primary sealing element, offering enhanced wear resistance, chemical compatibility, and low friction. Secondary support includes a fluorocarbon backup ring to prevent extrusion under pressure spikes. Thread profiles are available in 1/8" NPT or custom metric pitches, enabling integration into both North American and global fluid power architectures. This configuration excels in delivery systems for professional coatings that demand cleanliness and repeatability.
Independent testing confirms the 123739 sustaining 5000 psi continuous operating pressure, with a burst threshold exceeding 10 000 psi. Cyclic fatigue life surpasses one million cycles at 2500 psi with zero detectable leakage. Static leakage rates remain below 0.1 cc/min per VDMA 24364 standards. The flow coefficient (Cv) is optimized to reduce pressure drop, while withstanding viscosity ranges from 10 to 2000 cP. Temperature resistance spans –40 to +121 °C without dimensional drift. The assembly is compatible with inline sensor ports and withstands dynamic pressure pulses in high-pressure filtration environments, ensuring stable performance in critical recirculation loops and high-turnover spray headers.
For optimal reliability, tighten the flared fitting to 15–20 in·lb torque using a calibrated torque wrench. A light coating of silicone-based grease on the seal lip prevents dry-start abrasion. Apply Loctite 567 PTFE sealant sparingly on external threads to secure non-critical joints, avoiding contamination of the sealing chamber. Inspect sealing faces for scratches or corrosion, and check backup rings for deformation during routine service. Recommended maintenance intervals are six months under heavy cycling or annually in moderate systems. Cleaning protocols include solvent flushes and ultrasonic baths to remove resin, pigment, or particulate build-up without damaging the PTFE composite. Always replace seals exhibiting extrusion or lip roll.
The Graco 123739 flared seal fitting is specified across multiple industries, including automotive paint booths, aerospace composite layup stations, polymer processing reactors, and food-grade lubrication circuits. In hydraulic intensifiers and piston pumps it contributes to improved pump efficiency, reducing power consumption by up to 5% through minimized leakage and friction. Its compact size allows installation in injection molding manifolds, test-stand calibrations, and sampling ports without increasing footprint. The fitting also integrates seamlessly into high-capacity recirculation skids and mobile pressure washer units, offering engineers extended seal longevity and reduced downtime in both bench-top and field service configurations.
By combining flared geometry, precision-machined stainless steel, and a high-performance PTFE composite seal, the Graco 123739 flared fitting achieves industry-leading durability and leak control in restrained spaces. It supports elevated operating pressures, wide temperature swings, and rigorous chemical exposure without sacrificing dimensional stability or increasing maintenance frequency. Its design aligns with aerospace, automotive, and industrial finishing workflows, providing streamlined integration into existing pump networks. Whether deployed in airless sprayer modules, high-pressure filtration assemblies, or OEM fluid power systems, this fitting delivers consistent, high-efficiency performance and superior system lifetime in the most demanding scenarios.
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