Graco 118591 Washer Back-Up: Precision Seal Support
Compatible Machines
- Graco Mark V Electric Airless Sprayer
- Graco Mark X Gas Airless Sprayer
- Graco ProMix 2KS Sprayer
- Graco XM 5500 Industrial Sprayer
- Graco GH 833 High-Pressure Sprayer
Key Features
- Precision-milled to ±0.005 mm for consistent fit
- Corrosion-resistant alloys with fluoropolymer inner layer
- Supports O-ring seals in high-pressure pumps up to 3000 psi
- Reduces friction and wear for longer pump life
- Compatible with diverse coating materials including latex and epoxy
Description
The Graco 118591 Washer Back-Up is engineered to protect O-ring seals and ensure consistent pump performance in high-pressure airless sprayers. Its robust construction minimizes wear, prevents seal extrusion, and maintains fluid integrity, making it ideal for professional coating applications.
Installation & Maintenance
- Press-fit installation with calibrated tolerance ring or piloted adapter
- Apply low-friction, high-temperature grease to washer and O-ring surfaces
- Inspect every 5000 operating hours or 6000 cycles
- Replacement ensures uninterrupted operation and extended maintenance intervals
Frequently Asked Questions
It supports O-ring seals in high-pressure pumps, preventing extrusion and reducing wear for reliable pump operation.
Compatible with a wide range of coatings including latex, epoxy, and solventborne materials.
Recommended inspection is every 5000 operating hours or 6000 cycles, with replacement as a preventative measure for uninterrupted service.
