G75B

Perlast G75B offers a unique blend of excellent chemical resistance, mechanical properties and high temperature stability, simultaneously extending the operating limits in all three aspects.

Perlast® G75B has been specially formulated to provide increased acid resistance by eliminating fillers that are prone to acid attack and optimising the polymer structure. In addition, this perfluoroelastomer has low permeability and as a result, it is less prone to swelling, leading to extended in-service performance in, for example, valves, pumps and mechanical seals.

A high modulus makes Perlast G75B resistant to extrusion and ideal for use in medium-high pressure applications. In addition, the low cumulative compression set provides a high mean-time between maintenance cycles in hot chemically aggressive environments.

Perlast® G75B is suitable for both dynamic and static applications and can be fully moulded into O-rings (any size up to 2m/6.5ft internal diameter) and custom shapes.

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Producttype

O-rings

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Temperature

+275°C (+527°F)

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Key Attributes

  • Excellent chemical resistance to a wide range of chemicals
  • Exceptional acid and amine resistance
  • Superior mechanical properties
  • Long-term sealing efficiency at high temperature
  • Extremely low out-gassing properties
  • Good steam resistance (ASME BPE 2000)
  • Less than 2% swell in MIL-L-23699C jet oil after 336 hours at 200°C

Typical Applications

Aerospace – Inter-stage seal assemblies (static O-rings)

Chemical Processing – Pumps, Valves, Mechanical seals

Diesel – Pre-heat chambers
Exhaust valve seats

Semiconductor
– Gas abatement systems (static), High temperature environments

Oil & Gas – High temperature down-hole environments

Electrical bulkhead feed -throughs

Material Properties

Material type
ASTM D1418 / FFKM
Color
Black
Hardness (Shore A)
85
Tensile strength
18.0 MPa
Elongation at break
125 %
50% Modulus MPA
10.0 MPa
100% Modulus MPA
16.0 MPa
Compression Set (%): 70 h @ 200 ˚C (392 ˚F)
18
Minimum Operating Temperature
-15 ˚C (+5 ˚F)
Maximum Operating Temperature
+325°C (+617°F)
Continuous Use Temperature
+275°C (+527°F)

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