In hydraulic and pneumatic systems, sealing elements are key components to ensure the stable operation of the system. Pan-seal and Gly Ring are two common high-performance sealing elements. Although their names are similar, their structures, working principles and application scenarios are significantly different. This article will introduce the characteristics, differences and respective application fields of Pan-seal and Gly Ring in detail.
1. What is Pan-seal?
1.1 Definition
The Pan-seal (English name Metallic Spring Seal or Bellow Seal) is a high-precision sealing element, usually composed of a metal spring (such as stainless steel) and a sealing material (such as polytetrafluoroethylene PTFE). Its design enables it to achieve stable sealing in harsh environments such as high pressure, high temperature, and chemical corrosion.
1.2 Structural features
Metallic spring: provides elasticity and support force to compensate for the wear of the sealing material.
Sealing material: usually PTFE (polytetrafluoroethylene), which has chemical resistance, low friction coefficient and high temperature resistance.
1.3 Working principle
The elastic effect of the metal spring makes the sealing material always close to the sealing surface, while the PTFE material fills the sealing gap to prevent leakage. It is suitable for both static and dynamic sealing, especially in high pressure and high temperature environments.
1.4 Application Scenarios
Hydraulic system: hydraulic seals for high pressure and high temperature.
Aerospace: sealing requirements under extreme temperatures and pressures.
Chemical industry: high-performance seals resistant to chemical corrosion.
Heavy machinery: dynamic seals for heavy equipment.
2. What is a Glyd Ring?
2.1 Definition
Glyd Ring is a combined seal ring, usually composed of polytetrafluoroethylene (PTFE) and elastomers (such as rubber O-rings). It is designed to have low friction and good wear resistance in dynamic sealing.
2.2 Structural Features
PTFE body: provides low friction and chemical resistance.
Elastomer (O-ring): provides radial pre-compression force to ensure sealing performance.
2.3 Working Principle
The elastomer (O-ring) compresses the PTFE body to fit the sealing surface, thereby achieving sealing. It is suitable for dynamic sealing with high pressure and high-speed movement.
2.4 Application scenarios
Hydraulic system: used for high-pressure and high-speed hydraulic sealing.
Pneumatic system: used for sealing of pneumatic equipment.
Engineering machinery: used for dynamic sealing and high-friction environment.
Cylinder seal: widely used in cylinders.
3. The difference between Panseal and Gley Ring
Characteristics Panseal Gley Ring
Structure Metal spring + PTFE sealing material PTFE body + elastomer (O-ring)
Working principle Metal spring provides elastic support, PTFE fills the gap Elastomer provides compression force, PTFE fits the sealing surface
Main materials PTFE + metal spring PTFE + elastomer (rubber O-ring)
Applicable environment High pressure, high temperature, chemical corrosion High pressure, high speed dynamic seal
Application scenarios Hydraulic system, aerospace, heavy machinery Hydraulic system, pneumatic system, engineering machinery
Cost High (due to metal spring and precision manufacturing) Moderate (materials and manufacturing processes are simpler)
4. Misunderstandings
When discussing Panseal and Gley Ring, some misunderstandings often occur:
Panseal is not an O-ring: Panseal is a composite sealing element composed of metal spring and PTFE, which is completely different from a simple O-ring seal.
Gly Ring is not a C-ring or mechanical seal: Gly Ring is a sealing ring composed of PTFE and elastomer, which has nothing to do with C-ring or mechanical seal.
5. Summary
Both Pan Seal and Gly Ring are high-performance sealing elements, but their structures and working principles are different, so they are applicable in different scenarios:
Pan Seal: Through the combination of metal spring and PTFE, it is mainly used in extreme environments (such as high pressure, high temperature, chemical corrosion).
Gly Ring: Through the combination of PTFE and elastomer, it is mainly used for dynamic sealing (such as hydraulic and pneumatic systems).
When selecting sealing elements, it is necessary to make appropriate choices based on the specific working environment, pressure, temperature and movement conditions.
Post time: Jan-18-2025