Graco 104633 Valve, Pilot – Precision Pilot Control Valve for Industrial Systems
Compatible Machines
- Graco plural-component spray systems (e.g., XM series)
- Graco air-actuated finishing equipment with pilot-valve controls
- Graco large-capacity fluid dispensers using pilot-valve manifolds
- Graco automated coating rigs employing remote pilot-valve actuation
Product Description
The Graco 104633 Valve, Pilot is a finely engineered pilot-actuated control valve designed to manage high-precision actuation in fluid-handling and spray systems. It enables remote or automated signals to trigger main fluid valves or actuators, thereby supporting repeatable and accurate system behaviour under demanding industrial conditions.
Key Features
- Pilot-actuated design allows small control signal to operate a larger valve or actuator.
- Robust construction engineered for high-cycle and high-duty environments.
- Optimised for integration within manifolds or control modules in plural-component systems.
- Improves system responsiveness by minimizing actuation lag and enhancing control fidelity.
- Service-friendly design allows easier maintenance and replacement in complex installations.
Technical Specifications
| Specification |
Details |
| Part Number |
104633 |
| Component Type |
Pilot Control Valve |
| Intended Use |
Actuation of main fluid valves or systems via pilot signal |
| Typical Installation |
Integrated in manifolds or air control modules |
| Operating Environment |
High-cycle industrial fluid/spray systems |
Applications
The Graco 104633 Valve, Pilot is ideal for large scale finishing applications, plural-component spray machines, and high-throughput fluid handling installations where precise valve actuation, minimal response time and reliable switching are critical. It supports remote control of system flows, enabling efficient start/stop cycles and enhancing overall equipment uptime.
Performance Advantages
- Provides consistent and repeatable actuation of main valves or pumps.
- Reduces manual intervention by enabling automated pilot control.
- Minimizes system lag and improves responsiveness under variable load.
- Extends system life by using a dedicated pilot valve instead of over-driving main valve components.
- Enhances safety and reliability in high-volume industrial spray and fluid systems.
Maintenance Tips
During routine service, inspect the pilot-signal lines for leaks, ensure the valve body is free of contamination, and verify that the actuation signal properly transitions the valve state. Replace the pilot valve if actuation becomes sluggish, if internal ports show wear, or if the valve fails to drive the main actuator reliably.
Frequently Asked Questions
A pilot valve like the 104633 receives a lower-force control signal and uses it to actuate a larger main valve or actuator, enabling remote or automated system control with precise timing and reduced wear.
It is compatible with Graco industrial spray and fluid-handling systems that use pilot-valve control modules, plural-component manifolds and other remote actuation configurations — refer to the “Compatible Machines” list above for examples.
Install the pilot valve inline with the signal line to the main valve actuator, ensure all ports are clean, verify correct orientation, and test actuation without load before full-system activation.
Replace the valve if actuation becomes inconsistent, if the pilot doesn’t reliably shift the main valve, or if internal leakage or jamming is detected during system operation.
