Kalrez® 6375: Powering Critical Processes Across Industries Worldwide

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Across oil & gas, petrochemical, pharmaceutical and various other process industries, Kalrez® Spectrum™ 6375 has become the sealing material of choice used in more than 85% of critical applications where reliability cannot be compromised. Engineered to deliver broad chemical resistance and exceptional high-temperature stability, Kalrez® Spectrum™ 6375 offers proven performance in environments that expose elastomers to some of the harshest chemicals and demanding operating conditions.

Why Kalrez® 6375 Stands Out

1.Wide Chemical Compatibility

Kalrez® 6375 is designed to perform across a broad mix of chemicals—strong acids, bases, solvents and organic compounds. Its low volume swell helps prevent leakage, extrusion and premature seal failure.
It shows excellent resistance to:

  • Sulfuric acid
  • Glacial acetic acid
  • Water and steam at high temperatures
  • Maleic acid and urea

 

  1. High-Temperature Performance

With a maximum service temperature of 275 °C (527 °F), the compound offers outstanding thermal stability.
Its low compression set even after exposure to 204 °C (400 °F) helps maintain sealing force during long operating cycles, making it ideal for pumps, valves and reactors where temperature spikes are common.

A graph of compresion vs. time at 204 degree celcius

Where It Delivers Best-

Kalrez® Spectrum™ 6375 is widely used in:

  • Chemical and petrochemical processing
  • Fertilizer and urea plants
  • API and pharma facilities
  • High-temperature pump and valve applications

Its strength lies in providing dependable sealing where both chemical exposure and high heat are present.

If operations involve aggressive fluids, corrosive media, or extreme temperatures, Kalrez® 6375 offers a proven combination of chemical resistance, thermal stability and long service life. It helps minimize maintenance, reduce downtime and enhance overall equipment reliability.

Don’t let seal failures disrupt your operations. Kalrez® 6375 offers a long-lasting, high-performance sealing solution for the toughest environments. Reach out to Mascot Systems to upgrade your systems with proven FFKM technology designed for maximum uptime.

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