Features mechanical seal type 28xp
- California Residents: PROPOSITION 65 WARNING
- Cartridge design
- Unidirectional or bidirectional capability
- Single, double-opposed or tandem configuration
- Robust design with unparalleled field-proven pedigree
Recommended Applications type 28xp
- Centrifugal compressors
- Other compressors
About Mechanical seal type 28xp
Type 28xp 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 and primary ring 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.
Type 28XP: Possibly the most popular seal in the range today, the Type 28XP builds on the 28AT design and seals medium to high pressures with improved chemical resistance. It can also operate over a wider temperature range and is increasingly the preferred product for large sizes, and for applications requiring slow roll and coast-down where dry gas (very low dew point) conditions and rotational speeds lower than the lift off speed of the gas seal create arduous contacting operation. Type 28XP seals are also available with Carbon LF™ primary ring material for improved friction and wear-resistance for contacting operation in dry gas (very low dew point) conditions.
Design Features mechanical seal type 28xp
- Shrouded mating ring prevents secondary damage in the event of a mating ring fracture
- 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
Operating range mechanical seal type 28xp
-220°F to 600°F/-140°C to 315°C, dependent on overall duty conditions
6,500 psi(g)/450 bar(g) across single stage
Product Description type 28xp
Type 28xp compressor dry-running gas seals have been the industrystandard since the 1970s 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 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