Title: PGY Series Specialized Piston Rod Seal
Abstract:
The PGY Series is an advanced, compact piston rod seal engineered for reliable, long-life performance in demanding hydraulic and pneumatic systems. Its unique multi-component, unitized design integrates superior sealing and robust anti-extrusion capabilities into a single, space-efficient assembly, ensuring system integrity under high pressure, dynamic motion, and challenging environmental conditions.
1. Introduction
Ensuring zero leakage and reliable operation in hydraulic and pneumatic cylinders requires a robust and adaptive sealing solution. The PGY Series piston rod seal is designed to meet these challenges by combining an optimized sealing lip profile with an integrated anti-extrusion element, delivering exceptional performance and durability in a compact format.
2. Design & Core Features
The PGY Series features a unitized, dual-material structure engineered for optimal performance:
Primary Sealing Element: Composed of a high-performance elastomer, such as wear-resistant polyurethane (PU) or temperature-stable fluorocarbon rubber (FKM). Its precision lip geometry ensures a stable sealing interface with minimal friction and excellent fluid film control.
Integrated Anti-Extrusion Support: A rigid engineering plastic or metal ring, seamlessly bonded or mechanically assembled, provides critical support to the sealing lip. This prevents deformation and gap extrusion under high pressure, especially in applications with large radial clearances.
Optimized Dynamic Profile: The asymmetrical sealing profile is designed primarily for pressure from the internal side (system side), promoting efficient sealing and return of lubricating film during the rod retraction stroke.
3. Performance Advantages
High-Pressure Stability: Capable of handling continuous high pressures and pressure surges due to its integrated rigid support.
Outstanding Leakage Control: Delivers near-zero leakage performance across a wide pressure range, including low-pressure and static conditions.
Low & Consistent Friction: Optimized contact reduces breakout and running friction, enabling smooth operation, high efficiency, and precise cylinder control.
Enhanced Durability: The combination of abrasion-resistant materials and anti-extrusion design significantly extends service life, even in contaminated or demanding environments.
Easy Installation: The pre-assembled unit simplifies installation, reduces the risk of incorrect assembly, and saves space in the sealing gland.
4. Material Options
Standard (General Purpose): Polyurethane (AU/EU) for excellent wear resistance and mechanical strength.
High-Temperature / Chemical Resistant: Fluorocarbon Rubber (FKM) for aggressive fluids and elevated temperatures.
Wide-Temperature / Oil Resistant: Hydrogenated Nitrile Rubber (HNBR) for broad fluid and temperature compatibility.
5. Primary Applications
The PGY Series is ideally suited for demanding piston rod sealing in:
Heavy-Duty Hydraulic Cylinders (construction, agricultural, and forestry machinery)
Industrial Hydraulic Systems (presses, machine tools)
High-Performance Pneumatic Cylinders
Applications requiring reliable sealing in compact gland designs
6. Conclusion
The PGY Series specialized piston rod seal provides a robust, high-performance, and space-efficient sealing solution. Its integrated anti-extrusion design and material versatility make it a reliable choice for enhancing system reliability and longevity in a wide range of demanding dynamic applications.
Original text from: pneumatic seal https://www.bszzseal.com/
