TYPE 28EXP

Describe : Highest Pressure Non-Contacting, Dry-Running Gas Seal Type 28 compressor dry-running gas seals have been the industry standard since the early 1980s for gas-handling turbomachinery. Supported by John Crane’s patented design features, these seals are non-contacting in operation. During dynamic operation, the mating ring/seat and primary ring/face maintain a sealing gap of approximately 0.0002 in./5 microns, thereby eliminating wear.

Highest Pressure Non-Contacting, Dry-Running Gas Seal

Type 28 compressor dry-running gas seals have been the industry standard since the early 1980s for gas-handling turbomachinery. Supported by John Crane’s patented design features, these seals are non-contacting in operation.

During dynamic operation, the mating ring/seat and primary ring/face maintain a sealing gap of approximately 0.0002 in./5 microns, thereby eliminating wear.

These seals eliminate seal oil contamination and reduce maintenance costs and downtime.

Single, double opposed, and tandem cartridge seals are capable of handling a wide variety of gas sealing applications in the gas collection/transmission, refining, chemical and petrochemical processing industries.

The three seal type designations AT, XP and EXP refer to different design characteristics capable of handling increasing pressure conditions, although final seal selection recommendations are made based on a complete review of application conditions.

Description: GasSeal_28EXP

Design Features

  • Mating Ring
    Shrouded mating ring prevents secondary damage in the event of a mating ring fracture.
  • Leakage
    Low-level leakage can be vented to a safe area, used as fuel to drive equipment, or returned to process via a low-pressure ejector.

Quick Specs – Refer to datasheet for full specification and limits

TemperatureMax. range -140 C to 315 C / -220 F to 600 F, dependent on overall duty conditions
PressureUp to 450 BARG / 6,500 PSIG across single stage
SpeedUp to 200 m/s / 660 fps
SizeUp to 330 mm / 13inches

Download Gas Seal Type 28EXP (PDF)