Type 28EXP

Manufacturer: John Crane

Non contacting Gas Seal for Turbo Compressors

Type 28EXP: The product for the most challenging and hostile environments with proven and independently audited performance to 425 bar(g). Type 28 compressor dry running gas seals have been the industry standard since early 1970 for gas handling turbomachinery. Utilizing John Crane's patented spiral groove pattern, 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"/5 microns, thereby eliminating wear. These seals eliminate seal oil contamination and reduce maintenance costs and downtime. Single, tandem and double seal arrangements are available.

• Cartridge design

• Unidirectional or bidirectional capability

• Single, double opposed or tandem configuration

• Robust design with unparalleled field proven pedigree

TEMPERATURE LIMITS220°F to 600°F/ 140°C to 315°C, dependent on overall duty conditions

PRESSURE LIMITS6,500 psi(g)/450 bar(g) across single stage

SPEED LIMITS660fps/200m/s

SIZE LIMITS13.75"/350mm