Besides John Crane, which other manufacturers can produce dry gas seals?

There are many abroad; the more well-known ones include Germany’s Böger Brötchen, Japan’s Pira, and the United States’ Foss. In China, Chuanmi and Chengdu Yitong are also options

This post was last edited by tie008 on 2018-1-30 08:11. Dry gas sealing is a new type of non-contact seal that emerged in the late 1960s, based on gas dynamic pressure bearings and through fundamental improvements to mechanical seals; it achieves non-contact operation of the sealing surface primarily by adding dynamic pressure grooves to the rotating ring of the mechanical seal and by implementing corresponding auxiliary systems. John Crane in the UK was the first to apply dry gas seals to gas transmission equipment on offshore platforms in the late 1970s, with success. Dry gas seals were originally developed to address the sealing issues at the shaft ends of high-speed centrifugal compressors. Since they operate in a non-contact manner, the materials used for the sealing friction pairs are not significantly constrained by PV values, making them particularly suitable as shaft end seals for high-speed, high-pressure equipment. ~~~ There are many manufacturers of dry gas seals in China; Yitong and Chuanmi are both excellent~~~

In China, there are Dandong Clone and Shenbei Carbon

Sichuan Nikki, Shenyang Beican, Dongying Haisen, etc