John Crane 4054 Pike Ln, Concord, CA94520 John Crane is a leader in engineered sealing systems. Its products include welded metal seals and focused sealing and…More lubrication products. It serves the pulp and paper market as well as providing high-pressure cartridge seals for the pipeline and refinery services. Divisions of the company also sell pre-cut rings, flat gaskets and live load packing for valves. It also produces braided packing, enough each year to reach to the moon and back.