Jason Marquardt is a senior staff engineer at John Crane. He specializes in the design and application of sealing solutions for centrifugal compressors, centrifugal pumps and steam turbines. Readers can reach him at jtmarquardt@johncrane.com. John Crane is a provider of engineered products and services for major process industries, including oil and gas extraction and refining, power generation, chemical production, pharmaceutical manufacturing, pulp and paper production and mining. For more information, visit www.johncrane.com.