The Fietz Group manufactures bellows made of PTFE. Bellows are flexible, pleated components used to accommodate movement, expansion, vibration, or misalignment in piping systems or machine structures – even under particularly demanding chemical or thermal conditions.
The Fietz Group manufactures bellows according to your drawings or specifications.
Fietz bellows are frequently used in medical technology, the food processing industry and mechanical engineering.
Important: There are different pleat types:
machined round pleats – these bellows have increased pressure resistance
stamped pleats – higher strokes possible, suitable for lower pressures
Excellent chemical resistance
PTFE reacts with virtually no common chemicals – even strong acids, alkalis, or solvents do not attack it.
Wide temperature range
Typically usable from approximately –200 °C to +260 °C.
Very low coefficient of friction
Low adhesion, easy to clean.
Ageing-resistant
No embrittlement due to UV radiation or weathering.
A PTFE bellows consists of a thin-walled, pleated PTFE structure.
The pleat geometry allows for:
• Axial movements – extension/compression
• Lateral movements – lateral deflection
• Angular deflection
In many applications, PTFE bellows are combined with stainless steel or plastic support rings to increase pressure resistance.
• Chemical industry – acid and alkali lines
• Pharmaceutical and food industry – sterile, easy to clean, FDA-compliant
• Semiconductor manufacturing – high purity, no contamination
• Medical technology – gas and liquid transport without contamination
• Laboratory equipment – corrosive media, aggressive cleaning
• No corrosion
• No migration of plasticizers
• Wider temperature and chemical resistance range
• High purity – no abrasion into the medium
Our team of application engineering and materials experts looks forward to hearing from you and assisting you with:
