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

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 ‘Specifications’ tab for model specific information.

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Performance

Performance

Flow Coefficient (under standard configuration)
Tank Valve Size CV KV
0.5" 4.3 5.0
1.0" 15.8 18.3
2.0" 72.0 83.2
3.0" 170.0 196.5

Performance

Flow Coefficient (under standard configuration)
Tank Valve Size CV KV
0.5" 4.3 5.0
1.0" 15.8 18.3
2.0" 72.0 83.2
3.0" 170.0 196.5

Performance

Flow Coefficient (under standard configuration)
Tank Valve Size CV KV
0.5" 4.3 5.0
1.0" 15.8 18.3
1.5" 48.0 55.5
2.0" 72.0 83.2
3.0" 170.0 196.5

Specifications

Technical specifications

Viton A diaphragmsViton A (SR) diaphragmsViton GF diaphragms
Tank valve sizes0.5", 0.5" Extended, 1.0", 2.0" 0.5", 1.0", 2.0", 3.0" 0.5" Extended, 1.0", 1.5" Extended, 2.0", 3.0", 3.0" Extended 
ColourCream Black Black 
Diaphragm variant(s)Bellows, Straight Bellows, Straight Straight 
Parylene treatmentNo No No 
Operating temperature range -20 °C to 177 °C-20 °C to 177 °C-20 °C to 177 °C
Operating temperature range -4 °F to 350 °F-4 °F to 350 °F-4 °F to 350 °F
Compatible actuatorsAJS, AKS AJS, AKS AJS, AKS 
Actuator typeManual, Pneumatic Manual, Pneumatic Manual, Pneumatic 
Curing agentBPA BPA Peroxide 
Steaming required prior to installationNo No No 
ASME BPE appendix K SIP cycle rating200 200 200 
Total actuations during SIP cycle testing2000 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 
CertificationADCF, BSE/TSE free, FDA 21CFR177.2600, USP <87>, USP <88> Class VI ADCF, BSE/TSE free, FDA 21CFR177.2600, USP <87>, USP <88> Class VI ADCF, BSE/TSE free, FDA 21CFR177.2600, USP <87>, USP <88> Class VI 

Materials of construction

DiaphragmSynthetic 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 (EN).pdf
    PDF - 600.3kb

Datasheet

  1. ASEPCO diaphragms datasheet (EN).pdf
    PDF - 234.5kb

Order Information

Product codes

Code Product

VG05

Radial diaphragm extended .5" Viton A Cream

VT05

Radial diaphragm .5" Viton A Cream Straight

VT10

Radial diaphragm 1" Viton A Cream Bellows

VT20

Radial diaphragm 2" Viton A Cream Bellows
Code Product

VA05

Radial diaphragm .5" Viton "A" - steam grade Black Straight

VA10

Radial diaphragm 1" Viton "A" - steam grade Black Straight

VA20

Radial diaphragm 2" Viton "A" - steam grade Black USP Straight

VA30

Radial diaphragm 3" Viton "A" - steam grade Black Straight
Code Product

VF10

Radial diaphragm 1" Viton "GF" Black Straight

VF20

Radial diaphragm 2" Viton "GF" Black Straight

VF30

Radial diaphragm 3" Viton "GF" Black Straight

VFE17

Radial diaphragm extended 1.5" Viton "GF" Black

VFE30

Radial diaphragm extended 3" Viton "GF" Black

VGF05

Radial diaphragm extended .5" Viton "GF" Black

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