Flowserve Corporation , a leading provider of flow control products and services for the global infrastructure markets, today announced the launch of the McCANNA CryoSeal ball valve for cryogenic service. The CryoSeal represents the optimum design solution for cryogen flow isolation at temperatures as low as -320a F / -196a C. User benefits with this new product include increased uptime through the use of self-compensating, live-loaded stem seals which provide enhanced sealing life as well as leak-tight integrity.