EPDM rubber seal for door
Rubber diaphragm is mainly used in flow, pressure, differential, liquid level, constant temperature volume thermal compensation valve, regulating valve, automatic mechanical servo device, switch and counter.
Main materials are SBR,NBR and EPDM !
properties | nitrile | natural | EPDM | neoprene | viton | silione | butyl | SBR |
Abbreviation | NBR | NR | EPDM | CR | FKM | VMQ | IIR | SBR |
Hardness shore A | 40-95 | 40-95 | 40-90 | 40-90 | 40-90 | 20-80 | 40-80 | 40-80 |
Temperature | ||||||||
Max continous ℃ | 100 | 80 | 100 | 100 | 205 | 210 | 110 | 85 |
Max intermittant ℃ | 125 | 100 | 125 | 120 | 250 | 260 | 120 | 115 |
Low temp℃ | -40 | -40 | -45 | -40 | -20 | -60 | -40 | -55 |
Solvents | ||||||||
Alcohol | Good | Good | Good | Good | Good | Good | Fair | Good |
Acetone | Poor | Fair | Good | Fair | Poor | Fair | Good | Fair |
Acids | Good | Good | Good | Good | Excellent | Fair | Good | Good |
Bases | Fair | Good | Good | Fair | Good | Fair | Fair | Good |
Resistance | ||||||||
Oxidation | Good | Fair | Excellent | Very good | Excellent | Excellent | Excellent | Fair |
Ozone&weathering | Fair | Poor | Excellent | Very good | Excellent | Excellent | Excellent | Fair |
Oil | Excellent | Poor | Poor | Good | Excellent | Poor | Poor | Poor |
Flame retardance | Poor | Poor | Good | Excellent | Excellent | Good | Poor | Poor |
Water | Good | Fair | Excellent | Good | Good | Good | Very good | Fair |
Other | ||||||||
Physical strength | Good | Excellent | Good | Good | Good | Poor | Good | Good |
Compression set | Good | Good | Good | Good | Good | Good | Fair | Good |
Tear&Abrasion | Good | Excellent | Good | Good | Good | Poor | Good | Good |
Sesilience | Good | Excellent | Very good | Very good | Poor | Fair | Good | Good |
Gas permiability | Good | Poor | Low | Very good | Very good | Good | Very good | Low |
Electrical strength | Poor | Excellent | Excellent | Good | Good | Excellent | Excellent | Excellent |