PTFE O-Ring with Locking Collar

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PTFE O-Ring with Locking Collar

The PTFE O-Ring with Locking Collar is a precision-engineered sealing component specifically developed for glass fittings, coupling systems, and modular process assemblies. It combines the exceptional chemical inertness of PTFE with an integrated locking collar that ensures accurate positioning and secure retention during assembly.

Unlike standard O-rings, the locking collar prevents axial movement, twisting, or displacement, making it ideal for applications where alignment accuracy, repeatability, and sealing reliability are critical.

Design & Construction

• This sealing element consists of:
• A PTFE sealing ring that forms the primary leak-tight interface
• A mechanically formed locking collar that locates the O-ring precisely on the glass end

The collar acts as a positive stop, ensuring that the O-ring seats correctly every time, even during vertical assembly or repeated handling.

Material & Chemical Resistance

• Material: 100% PTFE (Polytetrafluoroethylene)
• Chemical Compatibility:
• Strong acids and alkalis
• Halogenated compounds
• Organic solvents
• High-purity and reactive media

Because only PTFE contacts the process fluid, these O-rings are suitable for corrosive, toxic, or contamination-sensitive applications.

Key Technical Features

• Locking Collar Geometry:
  Ensures correct axial positioning and prevents seal migration during flange tightening
• Precision Dimensional Fit:
  Manufactured to match glass OD, bore size, and coupling geometry
• Sealing Performance:
  Designed for vacuum and low-to-moderate pressure systems, dependent on mating hardware
• Thermal Stability:
  PTFE performs reliably from cryogenic temperatures up to elevated operating ranges (within system design limits)
• Low Friction Surface:
  Minimizes damage to glass sealing faces during assembly and disassembly
• Durability & Reusability:
  Resistant to chemical attack, aging, and wear, suitable for repeated installations

Installation & Handling Advantages

• Prevents Misalignment during coupling assembly
• Reduces Operator Error in manual installations
• Improves Assembly Speed in modular systems
• Maintains Consistent Seal Position across multiple cycles
• Protects Glass Components from uneven loading

The locking collar is especially beneficial where uncontrolled gasket movement could lead to leaks or glass stress.

Typical Applications

• Glass-to-Glass Coupling Assemblies
• Glass-to-Metal Transitions
• PTFE Bellow & Flexible Connections
• Laboratory & Pilot Plant Equipment
• Chemical & Pharmaceutical Processing Units
• Vacuum Systems and Mild Pressure Pipelines

Industries Served

• Chemical Processing
• Pharmaceutical Manufacturing
• Research & Pilot Plants
• Fine Chemicals & Specialty Chemicals
• Glass Pipeline & Reactor Systems

Compatibility & Customization

• Available in multiple DN sizes
• Designed to integrate with:
• Glass couplings
• Backing flanges
• Bellows flanges

Custom dimensions or profiles can be supplied to match specific glassware standards

Why Choose PTFE O-Rings with Locking Collar?

• Higher sealing reliability than standard PTFE O-rings
• Improved alignment and repeatability
• Reduced leakage risk
• Extended service life in aggressive environments
• Ideal for precision glass systems