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Seal Material Data

ACO Pipe® sockets are fitted with EPDM seals as standard for regular drainage applications. For particularly aggressive applications, FPM and NBR seals are available. Refer to the table below to assess suitability and contact ACO.

EPDM (Ethylene Propylene Diene Monomer)
EPDM was originally developed during the 1950s for vehicle tyre applications. It reached wider applications because of its suitability for outdoor use.

FPM (Fluoroelastomer)
FPM is a fluorocarbon and the best material for resistance to hostile chemical and oil environments at normal and elevated temperatures. This material is widely used in the chemical and pharmaceutical industries, but is significantly more expensive than EPDM.

NBR (Nitrile rubber)
NBR has good water resistance, excellent chemical resistance and durability.

Seal Assembly Replacement or Upgrade

sealsThe double lip seal is easily removed and replaced from the female end of all ACO Pipe®, pipes and fittings. This allows easy on-site upgrade of the seal material.

Seal Installation Notes

  1. If changing the seal, ensure the correct size and grade of seal is selected for the application (see table below).
  2. Ensure the seal itself and the zone around the pipe and/or fitting receiving the seal is clean, dry and free from dust, grit and any metallic particles.
  3. Insert the dry seal into the pipe and/or fitting recess. NOTE: the seal MUST be inserted so the double sealing lips face away from the opening of the pipe and/or fitting.
  4. Do not use tools to aid the assembly process otherwise damage to the pipes, fittings and seals may occur.
  EPDMFPMNBR
Water ResistanceExcellentGoodGood
Chemical ResistanceAcids
Bases
Good
Good
Excellent
Good
Excellent
Good
Solvent Resistance (20°C)Alcohol
Acetone
Benzene
Good
Good
Unsatisfactory
Good
Unsuitable
Good
Good
Unsuitable
Unsuitable
Oil ResistanceASTM Oil No. 1 @ 20°C
ASTM Oil No. 1 @ 100°C
ASTM Oil No. 3 @ 20°C
ASTM Oil No. 3 @ 100°C
Fair
Unsatisfactory
Unsatisfactory
Unsatisfactory
Excellent
150°C Excellent
Excellent
150°C Excellent
Excellent
150°C Good
Excellent
150°C Good
Fuel ResistanceASTM Fuel B @ 20°CUnsatisfactoryExcellentExcellent
ResistancesOxidation
Ozone & Weathering
Excellent
Outstanding
Outstanding
Outstanding
Outstanding
Low
Heat ResistanceMaximum Continuous
Maximum Intermittent
130°C
150°C
205°C
300°C
80°C
100°C
Low Temperature Resistance– 50°C– 20°C– 30°C
Gas PermeabilityFairly LowVery LowVery Low
Physical StrengthGoodGoodGood
Compression Set ResistanceGoodGoodGood
Tear & Abrasion ResistanceGoodGoodGood
Cost Factor (1 = low)1202
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