The PNY-type piston rod seal is a precision-engineered, wear-resistant packing element specifically designed for pneumatic cylinder rods. Its standout feature? Exceptional eccentric tracking—the ability to maintain a perfect seal even when the rod runs off-center or experiences side loads.
The Misalignment Master
Real-world pneumatic cylinders rarely run perfectly true. Rod deflection, side loads, and normal wear can cause misalignment that compromises ordinary seals. The PNY seal is engineered specifically to handle these challenges. Its optimized geometry actively tracks rod movement, maintaining sealing integrity where conventional seals would leak.
One Seal, Any Air System
What makes the PNY truly versatile? It performs reliably across all common pneumatic conditions:
Lubricated air – Standard industrial systems
Non-lubricated air – Minimal lubrication
Dry air – Completely oil-free applications
One seal for every application. Simplified design. Reduced inventory.
Material Options
| Material | Temperature Range | Best For |
|---|---|---|
| NBR (RN729) | -20°C to +80°C | Standard applications, excellent wear resistance |
| FKM [RF905] | -5°C to +150°C | High-temperature environments, chemical resistance |
Operating Parameters
| Parameter | Specification |
|---|---|
| Maximum Pressure | 1.0 MPa (10 bar) |
| Maximum Speed | 1.0 m/s |
| Media | Compressed air (lubricated, non-lubricated, dry) |
| Installation | Directional—correct orientation essential |
Why Choose PNY?
Forgives Misalignment: Engineered specifically for rod applications requiring tolerance of off-center operation
Universal Compatibility: One seal works in lubricated, non-lubricated, and dry air systems
Long-Life Compound: Precision-formulated NBR provides exceptional abrasion resistance
Temperature Versatility: NBR for standard duty, FKM for demanding high-temperature environments
Globally Trusted: Proven design for standard cylinder applications worldwide
Installation Guidelines
Installation orientation is critical—pay attention to direction
Split groove designs may be necessary for one-piece installation
Avoid excessive lubricant in the seal’s valley during assembly
Standard Size Range
Available in metric rod diameters from 16 mm to 70 mm:
| Rod Dia. | Housing Dia. | Height | Part Number (Std) |
|---|---|---|---|
| 16 mm | 24 mm | 5.2 mm | PNY-16K |
| 20 mm | 28 mm | 5.2 mm | PNY-20K |
| 25 mm | 33 mm | 5.2 mm | PNY-25K |
| 32 mm | 42 mm | 6.5 mm | PNY-32K |
| 40 mm | 50 mm | 6.5 mm | PNY-40K |
| 50 mm | 60 mm | 6.5 mm | PNY-50K |
| 63 mm | 73 mm | 6.5 mm | PNY-63K |
High-temperature FKM versions available for select sizes.
Typical Applications
Standard Pneumatic Cylinders: General automation and industrial systems
Lubrication-Free Systems: Oil-free operation for cleanliness
High-Cycle Equipment: Packaging, assembly, continuous automation
Temperature-Sensitive Applications: Standard or high-temp environments
The PNY Piston Rod Seal delivers forgiving performance in a precision package—engineered specifically for pneumatic rods where misalignment happens and reliable sealing cannot.
Original text from: pneumatic seal https://www.bszzseal.com/
