This Dry Gas Seal can replace John Crane 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.
Features
- Cartridge design
- Unidirectional or bidirectional capability
- Single, double-opposed or tandem configuration
- Robust design with unparalleled field-proven pedigree
Parameters
Temperature: -220°F to 600°F/-140°C to 315°C, dependent on overall duty conditions.
Pressure： 180bar。
Speed： 660fps/200m/s。
Size：13.75″-350mm