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| Selection of Butterfly Valve |
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| Rubber Materials |
Abbreviation |
ASTM Code |
| Natutal Rubber |
NR |
AA |
| Nitrle Rubber |
NBR |
BF , BG , BK , CH |
| Ethylene propylene Rubber |
EPDM |
AA , BA , CA , DA |
| Polyacrylate Rubber |
ACM |
DF , DH , EH |
| Epichlorohydrin |
ECO |
CE |
| Vamac (Ethylene/Acrylic) |
E/A |
EE |
| Polychloroprene |
CR |
BC , BE |
| Urethane Rubber |
PU |
BG |
| Styrene butadiene copolyme |
SBR |
AA |
| Silicone Rubber |
SI |
FC , FE , GE |
| Hydrogenate Nitrile |
HNBR |
DH |
| Butyl Rubber |
IIR |
BA |
| Polybutadiene |
BR |
AA , BA |
| Polyisoprene |
IR |
AA |
| Hypalon Polyethylene |
CSM |
CE |
| Fluoro Carbon FPM |
HK |
Rubber |
| Fluorinated Silicone Rubber |
FLS |
FK |
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| A+ : Excellent |
A : Good |
B : Suitable |
C : Limited |
D : Poor |
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| Item |
NR |
IR |
SBR |
BR |
IIR |
EPDM |
CR |
NBR |
PU |
CSM |
ACM |
ECO |
VAE |
SI |
FPM |
| Tensile Strength |
A+ |
A |
A |
C |
C |
C |
A |
A |
A+ |
A |
D |
C |
A |
D |
A |
| Elongation |
A+ |
A+ |
A |
C |
A |
A |
A |
A |
A+ |
A |
D |
D |
D |
A+ |
D |
| Rebound Resistance |
A+ |
A+ |
C |
A+ |
D |
A |
A+ |
A |
A+ |
C |
C |
C |
C |
C |
C |
| Tear Resistance |
A+ |
A |
C |
C |
C |
C |
A |
A |
A+ |
C |
D |
C |
C |
D |
C |
| Abrasion-Resistance Resistance |
A+ |
A+ |
A+ |
A+ |
A+ |
A |
A |
A |
A+ |
A |
C |
C |
A |
D |
C |
| Mpact Strength Resistance |
A+ |
A+ |
A+ |
A |
A |
A |
A+ |
A+ |
A+ |
A |
C |
A |
C |
D |
C |
| Gas Impermeability Resistance |
C |
C |
C |
C |
A+ |
C |
A+ |
A |
A |
A |
C |
A+ |
A |
D |
A |
| Oxygen Resistance |
C |
C |
C |
C |
A+ |
A |
A |
C |
A |
A+ |
A |
A |
A+ |
A+ |
A+ |
| Ozone Resistance |
D |
D |
D |
D |
A |
A+ |
A |
D |
A |
A+ |
A |
A+ |
A+ |
A+ |
A+ |
| Weathering Resistance |
C |
C |
C |
C |
A+ |
A+ |
A |
C |
A |
A |
A |
A |
A+ |
A+ |
A+ |
| Flame Resistance |
D |
D |
C |
C |
A+ |
A+ |
A |
D |
A |
A+ |
A |
A |
A+ |
A+ |
A+ |
| Heat Resistance |
D |
D |
C |
C |
A |
A+ |
A |
C |
C |
A |
A |
A |
A |
A+ |
A+ |
| Low Temperature Resistace |
A |
A |
C |
A |
C |
A |
C |
C |
A |
C |
D |
A |
A |
A+ |
A |
| Oil and Fuel Resistance |
D |
D |
D |
D |
D |
D |
B |
A |
A |
B |
A |
A |
C |
C |
A+ |
| Animal and Vegetable Oil Resistance |
C |
C |
C |
C |
A |
A |
A |
A+ |
A |
A |
A+ |
A+ |
C |
B |
A+ |
| Alcohol Resistance |
A |
A |
A |
A |
A |
B |
A+ |
A |
B |
A+ |
A |
A |
A |
A |
A |
| Alkaline Resistance |
C |
C |
C |
C |
A+ |
A |
A+ |
A |
D |
A+ |
D |
B |
A |
D |
B |
| Acid Resistance |
B |
B |
B |
B |
A |
A |
A |
A |
D |
A |
C |
C |
C |
C |
A |
| Aliphatic-solvent Resistance |
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| Aliphatic |
D |
D |
D |
D |
D |
D |
A |
A+ |
A |
A |
A+ |
A |
C |
D |
A+ |
| Aromatic |
D |
D |
D |
D |
D |
D |
C |
B |
D |
C |
C |
A |
D |
D |
A+ |
| Oxygen Ated-solvent Resistance |
A |
A |
A |
A |
A+ |
A+ |
D |
D |
D |
C |
D |
D |
C |
C |
D |
| Water Resistance |
A+ |
A+ |
A |
A+ |
A+ |
A+ |
A |
A |
C |
A |
D |
A |
A |
A |
A |
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| A Brief Introduction To Our Materials |
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(SBR) Styrene-butadiene rubber : Excellent to aging, heat, and abrasion, more oil resistance than NR. Suitable for Tires, Rollers, hose, Medical, Bushes… |
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(BR) Butadiene rubber : Excellent to abrasion, low temperature, suitable for rubber shoes,tubes,regrigerating engineering.. |
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(CR) Choroprene rubber : Excellent to heat resistance, good weather / ozone resistance, it is Non-self-ignition mateial, take away from fire. Suitable for automotive component, hose, aerespace parts. Parts used at low temperature. |
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(NBR) Nitrile–butadiene rubber: Excellent to oil / heat / abrasion resistance. Suitable for oil seals, rollers, electro conductive items…. |
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(EPDM,EPM)ethylene-propylenediene copolymer : Excellent to weather / ozone resistance. Excellent elastic and it is water and steam resistance. Suitable for automotive, brake item, water tube, vibration absorbers…. |
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Silicone rubber : Good Ozone, weather resistance. Physical very stable even temperature change from 60 to 250 degree C, suitable for electronic parts, medical items, cooking bowl… |
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(FKM) Viton : Excellent to chemical/ high heat / ozone resistance. Good to lubrication, solvent, and weather resistance. Suitable for automotive industries and various gasket, o-rings, seals for diverse industries. |
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