Type 28AT: The original gas seal, with a design pedigree stretching back over 30 years and evolving gradually, installed and proven in thousands of compressors all around the world and remaining the preferred seal choice for many customers. Type 28 compressor dry-running gas seals have been the industry standard since early 1970 for gas-handling turbomachinery. Utilizing John Craneas 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.

John Crane TYPE 28AT Non-contacting Gas Seal for Turbo Compressors Features:

Cartridge design

Unidirectional or bidirectional capability

Single, double-opposed or tandem configuration

Robust design with unparalleled field-proven pedigree

Seals can be customized according to your requirments.

We have in total 35 different brands of mechanical seals with a total number of 1457 types of 

mechanical seals.

Johncrane Mechanical Seals

Eagleburgmann Mechanical Seals

Flowserve Mechanical Seals

BorgWaner Mechanical Seals

Burgmann Mechanical Seals

KBS Mechanical Seals

NOK Mechanical Seals

Aesseal Mechanical Seals

Kaco Mechanical Seals

Eagle Mechanical Seals

Depac Mechanical Seals