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Type SV02FKMSize 500 °C to 130 °C

BURKERT 677690 Type SV02 FKM Diaphragm Size 50

Burkert 677690 Type SV02 replacement diaphragm for industrial valves. Features FKM (fluor rubber) construction, size 50, and a temperature range of 0°C to 130°C.

BURKERT 677690 Type SV02 FKM Diaphragm Size 50

BURKERT 677690 Type SV02 is a replacement diaphragm packed for industrial valve applications. This size 50 diaphragm is constructed from FKM (fluor rubber) and is designed to operate within a medium temperature range of 0 °C to 130 °C.

Storage of Elastomer Parts

Elastomer parts could lose their eponymous features as storage time progresses. These changes happen based on various influencing factors such as light, heat, ozone, humidity, deformation, oxygen, oils and solvents. International standards such as DIN 7716 or ISO 2230 Basic illustrate basic instructions for correct storage.

Correct storage is an important factor in the operating life of elastomers especially for highly stressed components (e.g. diaphragms).

Storage Conditions

  • Optimal storage temperature is between + 5°C and + 25°C. The parts shouldn't be stored next to a heating element.
  • Relative air humidity should be less than 65% with condensation avoided at all times.
  • Parts should be stored away from all direct sunlight and artificial light with a high UV, as this will speed up the ageing process.
  • All parts should be also stored in an airtight container to protect them from circulating air and other environmental influences such as Ozone for example.
  • Ozone generating devices, such as electric motors, should also not be operated within storage areas.
  • Elastomer parts are best stored in a relaxed and non deforming condition.
  • Contact to solvents, oils, fats and other chemicals should be avoided at all times.
  • No contact with rubber products of varying composition especially of varying colors.
  • No contact with parts made of cooper, manganese or alloys of these metals.

Maximum Storage Periods by Material

Raw MaterialStorage Period (max.)
EPDM7 years
NBR5 years
FKM7 years
FFKM7 years
Butyl5 years
CR6 years
CSM7 years

Expected Life Cycle for Diaphragms

Based on the above, the following is the expected life cycle for diaphragms.

Raw MaterialStorage Period (max.)Operating Time (max.)
EPDM7 years3 years
FKM7 years4 years
PTFE or advanced PTFE10 years3 years