Rubber Fab Kalrez® LS390 Tri-Clamp Gaskets


Kalrez® is a sealing product for use in food, beverage and pharmaceutical processing applications where FDA and Class VI compliance is required. Kalrez® Tri-Clamp® gaskets are designed to address thermal and chemical resistance, compression set issues and high static friction, which can cause intrusion in the process line. Kalrez® gaskets are designed to address these problems by offering high hardness, low stiction and a high temperature resistance. These properties enable increased MTBR (Mean time Between Repair). Because of its unique grey color, LS390 seals are easy to identify for proper material selection and application.


  • Low Stiction Performance
  • WFI and SIP/CIP Process
  • High Hardness/Modulas
  • Ease of Identification (Grey color)

Technical information

Sizes ASME BPE 1/2" to 6", DIN & ISO (on request) 
Max. Temp. up to 220°C
Connections Tri-clamp, NA-Connect
Standards ASME BPE, DIN, ISO (other on request)
Material Kalrez® LS390 (Grey)


FDA, USP Class VI-121°C, {87}, {88}