Graco 115141 Spring Compression

Precision Compression Spring for Graco 115141: Advanced Load Control and Durability in High-Pressure Fluid Systems

The Graco 115141 Spring Compression is engineered for high-performance fluid delivery systems, offering precise preload control in sealing and pump assemblies. Manufactured from quenched and tempered high-carbon steel, its compact 0.300 in diameter and 1.950 in length geometry fits tight pump chambers while maintaining consistent coil spacing and end squareness. Finite element validation confirms linear load-deflection up to 15 lbs preload, corresponding to a spring rate of 21.5 lb/in over 0.7 in deflection. Surface phosphate treatment enhances corrosion resistance and reduces friction, supporting seal longevity in professional coatings and abrasive environments. This component also improves acoustic performance in airless sprayer modules through vibration damping optimization.

• Coil OD: 0.300 in; Free length: 1.950 in
• Spring rate: 21.5 lb/in; Max load: 15 lbs
• Material: High-carbon steel alloy; Hardness: HRC 45–50

Design precision of the 115141 spring compression element is achieved through tight manufacturing tolerances: wire diameter ±0.002 in, coil pitch ±0.010 in, and free length ±0.020 in. End coils are ground flat and squared to ensure uniform load distribution against pistons and seal seats. Controlled shot peening imparts compressive residual stresses, boosting fatigue resistance for over two million cycles at working loads. Phosphate conversion coating, 3 µm thick, reduces metal-to-metal wear and supports lubrication film retention. Finite element analysis confirms stress peaks remain below yield limits under 3,000 psi fluid backpressure. This process yields reliable pump efficiency and minimal spring set .

Installation requires precise alignment within pump housings. The spring seats in a calibrated groove to maintain consistent preload, yet a radial misalignment of 0.005 in can alter force characteristics by 7%. Operators should verify concentricity within 0.003 in using go/no-go gauges. During maintenance, inspect after 500,000 cycles and replace based on cycle count and cumulative pump runtime. Lubrication with compatible fluorocarbon grease prevents galling at temperatures up to 200 °C, preserving seal interface integrity. Integration with high-pressure filtration modules ensures abrasive particles cannot erode coil surfaces, thereby extending component and seal construction life. Optimal assembly torque settings maintain consistent spring compression without overstressing the material .

Performance testing demonstrates the Graco 115141 spring compression provides less than 0.5% load variation after 100,000 cycles at 15 lbs preload and 3,000 psi fluid pressure. Temperature fluctuation tests from -20 °C to 120 °C show spring rate stability within 1%. Harmonic vibration analysis records a 20% reduction in resonant amplitude when integrated into pump modules, enhancing acoustic characteristics. Compliance with ISO 9001 certification ensures repeatable dimensional accuracy and quality traceability. Precise pressure regulation studies indicate drift less than 0.3% over extended operations, critical for uniform coating applications. These metrics confirm consistent seal longevity and pump efficiency under continuous-duty operation. The compression spring’s predictable load-deflection curve supports precise pressure control in advanced fluid handling systems.

The core material is a high-carbon steel alloy microalloyed with chromium and vanadium, achieving a tensile strength of 200 ksi and elongation above 12%. Quenching and tempering cycles are tightly controlled to maintain hardness between HRC 45 and 50. Shot peening introduces compressive stress up to 428 MPa at the surface, dramatically improving fatigue life. Surface phosphate coating of 2–5 µm thickness reduces friction coefficient to below 0.15 and provides corrosion resistance. Each batch undergoes nondestructive eddy current testing to detect subsurface imperfections. This materials engineering foundation ensures robust performance in harsh chemical and abrasive environments encountered in spray coating equipment.

In OEM integration, the compact dimensions of the Graco 115141 spring compression enable fitting within limited space pump heads, particularly in airless sprayer configurations. Its linear response time supports rapid pressure recovery during high-cycle coating operations. Engineers utilize its predictable hysteresis characteristics to calibrate dispensing nozzles and maintain uniform professional coatings thickness. Coupling with multi-stage high-pressure filtration protects the spring from particulate ingress, preserving micro-coil geometry. Maintenance cycles align with standard pump overhauls, streamlining service schedules. Through integration into high-flow pump modules, this spring contributes to improved equipment effectiveness and reduced maintenance costs over operational lifecycles. This spring’s compatibility with existing Graco pump platforms accelerates time-to-market for new fluid delivery designs.

The Graco 115141 Spring Compression is a critical component for high-pressure fluid delivery, combining precise spring rate, durable metallurgical properties, and consistent performance metrics. Advanced manufacturing and material treatments yield exceptional seal longevity and pump efficiency in continuous-duty coating systems. Its integration versatility spans from airless sprayer modules to robotic dispensing valves, ensuring reliable preload control across diverse industrial applications. Finite element fatigue modeling and rigorous quality inspections guarantee a robust lifecycle exceeding two million compression cycles. Overall, this spring sets a standard for precision load control in professional coatings and high-pressure filtration environments.