Graco 15C226 U‑Cup Seal
The Graco 15C226 U‑Cup Seal is a durable dynamic seal designed to prevent fluid leaks in reciprocating or rotating applications. With its U‑shaped profile, it delivers reliable sealing while maintaining smooth motion and long-term service life.
Compatible Machines
- Graco piston pumps requiring dynamic fluid seals
- Graco diaphragm or bellows pumps that use U‑cup packing
- Graco fluid control systems with U‑cup style sealing
Key Features
- U‑shaped lip design for high-pressure sealing
- Elastomer material for flexibility and resilience
- Precision molded for consistent dimension and fit
- Low friction profile enables smooth operation
- Designed for dynamic (reciprocating or rotating) service
Benefits
- Reduces fluid leakage, increasing system efficiency
- Enhances pump life by minimizing wear during motion
- Improves reliability under high-pressure and high-cycle conditions
- Simplifies maintenance with a robust, replaceable seal
Technical Specifications
| Part Number | 15C226 |
| Type | U‑Cup Seal |
| Seal Profile | U‑shaped dynamic lip |
| Material | Elastomer (chemical-resistant) |
| Service | Reciprocating or rotating shafts |
| Operating Conditions | High pressure, high cycle |
| Installation Direction | Seals in one direction only — verify orientation |
Installation Tips
- Verify the correct orientation of the U‑cup lips — wrong direction can lead to leakage.
- Lubricate the seal lightly with compatible lubricant before installation.
- Avoid using sharp tools during installation to prevent damaging the lip.
- If installing over sharp or rough surfaces, slide the seal carefully to avoid cuts.
Why Choose the 15C226?
This U‑Cup Seal is ideal for high‑duty Graco fluid systems where reliable dynamic sealing is critical. Its robust design and quality material help provide leak protection, smooth operation, and extended component life in demanding industrial applications.
Frequently Asked Questions
The U‑cup lips must face the fluid source. Installing it backward can cause leakage.
It’s best to apply a very thin film of lubricant (e.g., Krytox 203GPL) to the seal before installation to ensure proper seating.
Using sharp tools can damage the sealing lips, causing leaks or seal failure. Handle the seal gently during installation.
