The following chart is for typical applications at moderate cycles and is based on a combination of laboratory results and field testing. System fluid selection and contamination can significantly affect performance. Since real world usage can vary widely, ACC INC cannot guarantee the acceptability of any particular system or the expected life of an elastomer product.
The use of compatible clean fluids is highly recommended. Proper filtration is necessary. High temperature applications should use oil coolers. Low temperature applications require fluid that is in a liquid state.
|BLADDER MATERIAL SPECIFICATIONS
|RUBBER COMPOUND||CODE||PEAK RANGE (F)||OPTIMAL RANGE (F)||PERMEABILITY||HARDNESS SHORE (A)||TENSILE (PSI)||ELONGATION (%)
|BUNA-NITRILE||N/A||-10 TO 220||35 TO 160||.39||60||2000||400|
|LOW TEMP BUNA-NITRILE||L||-60 TO 200||-25 TO 145||2.05||50||1500||400|
|EXTREME LOW TEMP NITRILE||X||-80 TO 200||-25 TO 145||2.10||60||1500||400|
|BUTYL||B||-45 TO 200||35 TO 160||.22||60||1500||400|
|ETHYLENE-PROPYLENE (EPR)||E||-55 TO 330||35 TO 250||2.25||60||1500||400|
|FLUORO-ELASTOMER (FKM)||V||0 TO 350||35 TO 350||1.72||65||1300||400|
|HYDRIN/ECO||H||-40 TO 275||-||.23||60||1300||400|
PEAK: Upper value is based on elastomer vendor data. Lower value is based on ASTM D-1053.
OPTIMAL: Based on good hydraulic practices. Extended operation beyond these temperatures may shorten the life of the bladder.
PERMEABILITY: Based on ASTM D-1434 at 73° F. Units x 10-8 cm2/sec • atm.
OTHER PHYSICAL PROPERTIES: Values are nominal and are based on laboratory results.
There are thousands of chemical compounds that have been tested with bladder elastomers. An up to date compatibility chart of the most popular fluids can be found here using our rubber compatibility tool. Please contact our sales department for additional assistance in determining the proper elastomer for your application.