John Crane Type 155 mechanical seals
This is a particularly economic mechanical seal, highly valuable and with interchangeable components. The basic pairing Ceramic-Carbon provides type 3 with a vast field of applications also with non-limpid liquids. The possibility of replacing the wearing rings alone after their common working period keeps maintenance costs low. Its metallic parts are in stainless steel and the gaskets may be in various kinds of elastomer, which again widens the range of possible applications.


John Crane Type 155
John Crane Type 155
Burgmann Type M3N/11U
Material used :
  • Stationary Ring (Carbon/SiC/SSiC/TC)
  • Rotary Ring (Alumina 99%/Alumina 99.5%/SiC/SSiC/TC)
  • Secondary Seal (NBR/EPDM/Viton)
  • Spring and Punched Parts (SS304/SS316)
Working conditions:
  • Pumps: Water pumps, circuation pumps, etc
  • Temperature: -20°C~200°C
  • Pressure: ≤0.8MPa
  • Speed: ≤ 10 m/Sec