Valves - diaphragms

PTFE diaphragms

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Overview

PTFE diaphragms

Polytetrafluoroethylene (PTFE) offer the ultimate chemical resistance and purity. Our PTFE diaphragms are extremely chemically resistant, often used with heptane and methyl chloride.

All our diaphragms are laser-etched with cure dates and batch numbers, ensuring that they are completely traceable.

Features and benefits

  • Not really an elastomer; has cold flow issues that can result in leaking
  • Relatively higher cost to other materials
  • Currently only available for our tank valves
  • All our diaphragms are laser-etched with cure dates and batch numbers, ensuring that they are completely traceable

Technical summary

Diaphragm variant(s)Bellows 
Compatible actuatorsModified AJS 
Compatible valvesRadial 
Material specificationPolytetrafluoroethylene 
StandardsASME BPE, RoHS 

Technical Summary table lists features available within the range. See ‘Technical specifications’ tab for model specific information.

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Specifications

Technical specifications

PTFE diaphragms
ColourWhite 
Diaphragm variant(s)Bellows 
Parylene treatmentNo 
Operating temperature-85 °F to 300 °F (-65 °C to 150 °C)  
Max. operating pressure4.5 
Max. operating pressure50 psig
Compatible actuatorsModified AJS 
Compatible valvesRadial 
Shelf life5 years
Material specificationPolytetrafluoroethylene 
StandardsASME BPE, RoHS 
Certification and compliance21 CFR 177.1550, ADCF, BSE/TSE free, USP <87>, USP <88> Class VI 

Materials of construction

Virgin PTFE 8AX
Inserts304 SS

Documentation

Brochures

  1. ASEPCO weirless radial diaphragm valves (US).pdf
    PDF - 605.5kb

Datasheets

  1. PTFE diaphragms datasheet (US).pdf
    PDF - 235.5kb

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