The PPD-type piston rod seal is a precision-engineered, double-acting piston seal specifically designed for compact pneumatic cylinders. Its miniature cross-section and advanced geometry make it the ideal choice for space-constrained applications where reliable performance cannot be compromised.
Compact Design, Powerful Performance
The PPD seal represents intelligent miniaturization. Its small cross-sectional profile enables installation in tight spaces where conventional seals simply cannot fit—perfect for standard cylinders, small-bore actuators, and thin-profile pneumatic systems.
Smarter Than Ordinary Seals
What makes the PPD seal different? Its specialized geometry delivers two critical advantages over conventional O-rings:
No Twisting: The unique design prevents rolling and twisting during operation, ensuring consistent sealing performance cycle after cycle.
Tracks Misalignment: Exceptional eccentric tracking properties maintain sealing integrity even when pistons experience side loads or minor misalignment—a common reality in real-world applications.
Material Options
Material Temperature Range Best For
NBR (Nitrile) -20°C to +80°C Standard pneumatic applications, excellent wear resistance
FKM (Fluorocarbon) -5°C to +150°C High-temperature environments, chemical resistance
Operating Parameters
Maximum Pressure: 1.0 MPa (10 bar)
Maximum Speed: ≤ 1.0 m/s
Media: Compressed air (lubricated, non-lubricated, or dry air)
Installation: Easy mounting on one-piece pistons
Why Choose PPD?
Balanced Performance: Engineered for the perfect balance between durability and low friction—delivering millions of reliable cycles.
Dual-Pressure Capability: Works effectively regardless of pressure direction, simplifying design and reducing complexity.
Interchangeable Design: Housing dimensions fully compatible with PSD series seals, offering design flexibility and simplified inventory.
Wear-Resistant Compound: Precision-formulated NBR provides exceptional abrasion resistance for long service life.
Versatile Compatibility: Performs reliably in lubricated, non-lubricated, and dry air applications (with initial assembly lubrication).
Installation Tips
Easily mount by stretching over one-piece pistons into the groove
Chamfer all sharp edges to prevent seal damage
For dry air operation, always apply initial lubrication during assembly
Standard Sizes
Available in metric diameters from 5.4 mm to 160 mm, with complete interchangeability to PSD series dimensions.
Typical Applications
Standard Cylinders: General automation and industrial systems
Small Bore Cylinders: Precision equipment and instrumentation
Thin Cylinders: Space-constrained applications
Industrial Automation: Pick-and-place units, grippers, assembly equipment
The PPD Piston Seal delivers big performance in a small package—precision-engineered for compact pneumatic systems where reliability, longevity, and space efficiency matter most.
Original text from: pneumatic seal https://www.bszzseal.com/
