Product details

TYPE 28ST
Product code : TYPE 28ST
Price : Contact
Describe : Non-Contacting, Steam Turbine Gas Seal Type 28ST combines proven rotating groove technology and high-temperature secondary seals to reduce steam leakage by nearly two orders of magnitude, as compared to traditional sealing devices such as segmented carbon rings and labyrinths. This steam-lubricated, end-face cartridge seal reacts instantaneously and automatically to maintain a safe face gap despite sudden changes in operating conditions.

Description: 28STNon-Contacting, Steam Turbine Gas Seal

Type 28ST combines proven rotating groove technology and high-temperature secondary seals to reduce steam leakage by nearly two orders of magnitude, as compared to traditional sealing devices such as segmented carbon rings and labyrinths.

This steam-lubricated, end-face cartridge seal reacts instantaneously and automatically to maintain a safe face gap despite sudden changes in operating conditions.

A stable seal face gap, typically 0.0025mm to 0.0051mm / 0.0001" to 0.0002", is the result of specially designed rotating grooves, which pump steam radially inward into a nongrooved portion of the seal known as the "sealing dam." This seal is primarily for use on steam turbines.

Description: GasSeal_28ST


Design Features 

  • Bearing oil steam contamination reduced.
  • Standard designs fit most single-stage turbines.
  • Reduced noise levels and hazards associated with leaking steam.
  • Support equipment eliminated.
  • Bi-Directional face patterns available


Quick Specs - Refer to datasheet for full specification and limits

Temperature

40 F to 500 F / -40 C to 260 C

Pressure

Up to 27.6 bar g / 400 psig

     

Speed

Up to 122 m/s / 400 fps max

     

Download Gas Seal Type 28ST (PDF)

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