FLENDER COUPLINGS N-EUPEX 3103en, Assembly And Operating Instructions Manual, Page: 59 / 64

A.5 Flexible elements (12)
A.5.1 Use and storage of flexible elements (12)
Note the following concerning the use and storage of the flexible elements (12):
• Storage possible for up to 5 years
• Protect against direct sunlight, artificial light with a high UV‐content and extreme
temperatures
• Avoid contact with aggressive media
• Only replace complete sets
• Only use flexible elements of the same type and age
A.5.2 N-EUPEX flexible elements (12)
Table A-6 N‑EUPEX flexible elements
Material Hardness Comment Marking Ambient tempera‐
ture
Approved for
explosion group
NBR 80 Shore A Standard Black flexible elements
with
blue stripe
-30 °C to +80 °C IIA, IIB, IIC
NBR 65 Shore A Special, soft,
shifting of the
resonant speed,
rated torque
reduced
Black flexible elements
with
green stripe
-30 °C to +80 °C IIA, IIB, IIC
NBR 90 Shore A Special, hard,
shifting of the
resonant speed
Black flexible elements
with
magenta stripe
-30 °C to +80 °C IIA, IIB, IIC
NBR 80 Shore A Special,
increased (low-backlash)
Black flexible elements
with
yellow stripe
-30 °C to +80 °C IIA, IIB, IIC
NBR 65 Shore A Special,
increased (low-backlash)
shifting of the
resonant speed,
rated torque
reduced
Black flexible elements
with
white stripe
-30 °C to +80 °C IIA, IIB, IIC
NR 80 Shore A Special,
low-temperature use
Black flexible elements
with
orange
stripe
-50 °C to +50 °C IIA, IIB, IIC
Technical data
A.5 Flexible elements (12)
Assembly and operating instructions 3103en
Edition 10/2020
59