DICHTOMATIK

ACM – acrylate rubber
ACM is used mainly by the automotive
industry as it is resistant to motor,
transmission and ATF oils. In terms of
application areas, ACM lies between
NBR and FPM. The temperature
application range is from -25°C to
+150°C.
EPDM – ethylene-propylene-diene
rubber / trade name: e.g. Nordel ®
(Du Pont-Dow Elastomers)
EPDM has good resistance in hot water
and steam, detergent, natron and
potassium hydroxide solutions, silicone
oils and greases, many polar solvents,
many diluted acids and chemicals, and
has a wide thermal application range.
EPDM materials offer no resistance with
all mineral oil products (lubricants, fuels).
Materials for
tension springs
Standard tension spring
Non-alloyed spring steel acc.
to DIN EN 10270-1
Exceptions
VIA, VIAS
(FPM standard rotary shaft seals):
rust and acid-resistant steel 1.4301
(AISI 304)
WEPO
(Rotary shaft seal made of PTFE):
rust and acid-resistant steel 1.4571
Optionally, other types can also be fitted
with the rust and acid-resistant springs
1.4301 (AISI 304) or 1.4571.
Materials for
metal inserts
(housing)
Standard material
Non-alloyed steel acc. to
DIN EN 10139
Special material
Rust and acid-resistant steel 1.4301
(AISI 304)
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