Valves - diaphragms

Viton diaphragms

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Overview

Viton® diaphragms

Viton® is a class of fluoropolymer elastomer (synthetic rubber) and is well known for its excellent heat, acid and chemical resistance. The performance of fluoroelastomers in aggressive chemicals depends on the grade of the elastomer.

There are three grades of Viton we currently use for our viton diaphragms:

  • Viton A the most commonly used version of Viton, but should not be used with most ketones, esters or extended steam exposure.
  • Viton A (SR) Steam resistant version of Viton A, performs well in conditions with extended steam
  • Viton GF is more chemically resistant than Viton A and offers good steam resistance. However, it should not be used with most ketones and esters.

Features and benefits

  • All our diaphragms are laser-etched with cure dates and batch numbers, ensuring that they are completely traceable
  • Excellent heat and chemical resistance
  • Steam resistant version available
  • Not suitable for use with ketones and esters

Technical summary

Diaphragm variant(s)Bellows, Straight 
Compatible actuatorsAJS, AKS 
Material specificationFluoropolymer elastomer, Peroxide cured F-type gum polymers, Steam resistant Viton A 
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

Viton A diaphragmsViton A (SR) diaphragmsViton GF diaphragms
ColourCream Black Black 
Diaphragm variant(s)Bellows, Straight Bellows, Straight Straight 
Parylene treatmentNo No No 
Operating temperature range -20 to 177 °C-20 to 177 °C-20 to 177 °C
Operating temperature range -4 to 350 °F-4 to 350 °F-4 to 350 °F
4.8 4.8 4.8 
Max. operating pressure70 psig70 psig70 psig
Compatible actuatorsAJS, AKS AJS, AKS AJS, AKS 
200 200 
2000 2000 
Shelf life4 years4 years4 years
Material specificationFluoropolymer elastomer Steam resistant Viton A Peroxide cured F-type gum polymers 
StandardsASME BPE, RoHS ASME BPE, RoHS ASME BPE, RoHS 
Certification and complianceADCF, BSE/TSE free, FDA 21CFR177.2600, USP <87> ADCF, BSE/TSE free, FDA 21CFR177.2600, USP <87> ADCF, BSE/TSE free, FDA 21CFR177.2600, USP <87> 

Materials of construction

Synthetic rubber compound, Viton® A Cream Fluoropolymer Elastimer, Viton® A Steam Grade 42563, Viton® GF 17340
Inserts304 SS

Literature

Brochures

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

Datasheet

  1. Viton A Diaphragms datasheet (US).pdf
    PDF - 204.1kb
  2. Viton A (SR) Diaphragms datasheet (US).pdf
    PDF - 201.3kb
  3. Viton GF Diaphragms datasheet (US).pdf
    PDF - 207.4kb

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