Glass to Glass PTFE Vacuum Bellows

Glass to Glass PTFE Vacuum Bellows

Glass to Glass PTFE Vacuum Bellows are high-performance flexible connectors designed specifically for vacuum service in glass pipeline and glass reactor systems. These bellows connect two rigid glass components while allowing axial movement, angular deflection, and misalignment, without compromising vacuum integrity.

Manufactured from high-purity PTFE, these bellows are engineered to prevent glass stress, joint cracking, and vacuum leakage that commonly occur in rigid glass connections under thermal or mechanical load.

Vacuum-Optimized Design

Glass-to-glass vacuum bellows are specially constructed to withstand external atmospheric pressure acting on the bellows under vacuum conditions. Design features include:

• Controlled convolution geometry to resist collapse under vacuum
• Uniform wall thickness for mechanical stability
• Optional internal vacuum support sleeve for larger diameters
• Distance locking bolts to prevent over-compression or elongation
• This ensures long-term dimensional stability and consistent flexibility during vacuum operation.

Material Construction

• Bellows Material: PTFE (Polytetrafluoroethylene)
• Surface Properties:
• Non-stick
• Non-contaminating
• Low gas permeability

Chemical Resistance:

• Strong acids & alkalis
• Organic solvents
• Corrosive vapors

Mechanical & Functional Features

• Full Vacuum Compatibility
  Maintains structural integrity under high and full vacuum
• Thermal Expansion Compensation
  Absorbs expansion and contraction between glass segments
• Misalignment Absorption
  Accommodates minor axial and angular installation deviations
• Vibration Isolation
  Reduces transmission of vibration to fragile glass joints
• Integrated Sealing Performance
  No additional gaskets required; bellows convolution provides sealing

Connection Configuration

• Connection Type: Glass flange to glass flange
• Mounting Hardware:
• Matching bellow flanges
• Nut-bolt sets
• Distance locking bolts (standard for vacuum duty)

Flange Drilling:

• Standard glass flange patterns
• Custom drilling on request

Technical Data – Typical

Parameter	Specification
Bellows Material	PTFE
Application	Vacuum / Low Pressure
Vacuum Rating	Suitable for full vacuum
Pressure Rating	Low to moderate (design dependent)
Temperature Range	As per PTFE limits
Nominal Sizes	DN 25 to DN 300
Movement Type	Axial & angular
Sealing Method	Integral PTFE bellows sealing
Internal Support Sleeve	Optional (DN ≥ 80 recommended)

Typical Applications

• Glass vacuum pipelines
• Distillation columns under vacuum
• Evaporation systems
• Glass reactors and receivers
• Laboratory and pilot plant vacuum setups
• Chemical and pharmaceutical vacuum processes

Industries Served

• Chemical Processing
• Pharmaceutical Manufacturing
• Research & Development Laboratories
• Fine Chemicals & API Production
• Specialty Glass Equipment Systems

Customization Options

• Custom DN sizes and effective lengths
• Vacuum-reinforced convolution designs
• Internal vacuum support liners
• Flange drilling as per customer standard

Why Choose Glass to Glass PTFE Vacuum Bellows?

• Designed specifically for vacuum glass systems
• Protects fragile glass connections
• Excellent chemical and thermal resistance
• Leak-tight, flexible, and durable
• Essential for safe vacuum operation