Graco 104632 Valve, Piloted – High-Precision Control for Industrial Spray Systems
Compatible Machines
- Graco industrial air-powered proportioning pump systems
- Graco large-capacity airless sprayer rigs
- Graco automated finishing and coating equipment
- Graco mobile spray assemblies with remote pilot-control valves
Product Description
The Graco 104632 Valve, Piloted is a robust 3-way control valve engineered for precise fluid regulation in high-pressure, industrial spray systems. Its pilot-actuated spool mechanism enables rapid response to changing load conditions, delivering reliable performance in demanding environments.
Key Features
- 3-way pilot-operated spool: Enables pump unload, recirculation or bypass control with minimal delay.
- Durable construction: Machined body with hardened internals withstands high-cycle, high-pressure use.
- Optimised flow paths: Minimises pressure drop and helps maintain stable fluid delivery.
- Flexible integration: Designed for manifold or block-mounted installation in spray systems.
- High-end performance: Tailored for continuous production use, including pigment-laden or solvent-rich fluids.
Technical Specifications
| Specification |
Details |
| Part Number |
104632 |
| Valve Type |
Pilot-actuated 3-way control valve |
| Port Sizes |
½-in line ports, ⅛-in pilot signal port |
| Construction Material |
Hardened steel body, polished internal flow channels |
| Typical Usage |
High-pressure spraying, pump unload, recirculation, bypass control |
Applications
The Graco 104632 Valve is ideal for industrial finishing lines, mobile spray rigs and OEM fluid-handling systems where fast switch-over, accurate pressure control and consistent fluid delivery are required. It supports complex circuits for coating application, fluid transfer and high-flow pumping systems.
Performance Advantages
- Enables tight control of pump unload cycles and fluid recirculation.
- Reduces system energy loss through optimised spool design and low leak paths.
- Improves finish consistency by stabilising flow and pressure under varying conditions.
- Minimises maintenance downtime thanks to durable materials and service-design spool cartridge.
- Supports high-build coatings and demanding fluid chemistries without sacrificing reliability.
Maintenance Tips
During service, ensure the pilot line remains free of debris, inspect the spool and seals for wear, and verify the valve cycles fully open and close. Replace worn components promptly to maintain trigger responsiveness and system integrity.
Frequently Asked Questions
“Piloted” means the valve uses a smaller control signal (pilot) to actuate a larger main fluid spool, allowing remote or hand-gun triggered switching with less wear and faster response.
It is compatible with air-powered proportioning and spray systems that require a 3-way pilot-actuated valve with ½-in line ports and an ⅛-in pilot port—commonly found in Graco spraying assemblies.
Make sure the pilot port is connected correctly, ensure line ports are tight and leak-free, and that the valve cycles properly under system pressure. Clean installation ensures long life and proper function.
Replace it if the valve shows sluggish response, internal leakage, pilot failure, or if fluid delivery becomes inconsistent. Early replacement avoids damage to downstream components and ensures consistent finish quality.
