Ready fitted seals

TB mechanical seals for reliable operation and fast and easy maintenance

TB1, TB1F and TB2 ready-fitted mechanical seals are designed for the seal chamber of the standard gland packing casing cover and for the standard shaft without extra shaft sleeve, for different pump types like AHLSTAR process pump range types A, APP, NPP, WPP.

TB1 ready-fitted single mechanical seal
  • The ready-fitted seals are designed as an organic part of certain centrifugal pump types without any extra components to get as much space between the seal and casing cover as possible for maximizing reliable operation.
  • The ready-fitted seals are fixed to the casing cover with a standard flange of the pump or with the flange of the seal.
  • The seal is fixed on the shaft without extra components such as shaft sleeve to get optimal material wall thickness for highly reliable operation.
  • The ready-fitted seals are simple and robust for fast and easy installation and maintenance. They do not need any complicated setting clips like cartridge seals do.
  • The single seal has been designed so that any pressure variations or dropouts of the pumped liquid do not open the seal faces.
  • The double seal has been designed so that any pressure variations or dropouts either on the side of the pumped liquid or sealing liquid do not open the seal faces. The seal faces do not open in the case of vacuum pressure, either.
  • The seal faces lie on the flexible O-rings so that they do not stand at an angle but are aligned accurately according to the shaft, giving a long and reliable operation time.
  • Due to the simple design of the ready-fitted seal, the cost of the seal is much lower than the cost of cartridge mechanical seals.
Technical Specifications Material Alternatives
TB1 TB1F TB2
P max 16 bar / 232 psi 16 bar / 232 psi 16 bar / 232 psi
V max

25 m/s / 82 ft/s

25 m/s / 82 ft/s  25 m/s / 82 ft/s

T max

125°C / 257°F

140°C / 284°F
with internal flushing

180°C / 355°F
with external flushing
180°C / 355°F
Seal faces
SiC/SiC, C/SiC SiC/SiC, C/SiC SiC/SiC-SiC/SiC
SiC/SiC-C/SiC
O-rings
EPDM, FKM EPDM, FKM EPDM, FKM
Other parts
AISI 316, AISI 329 AISI 316, AISI 329 AISI 316, AISI 329
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