Home » Specialty valves Specialty valves April 1, 2005 Reprints No Comments Flowserve Worcester tube bore WK74 series clean valves and Worcester high performance cryogenic ball valves provide critical service environment operation in temperatures from -320 Did you enjoy this article? Click here to subscribe to Food Engineering Magazine. Related Articles Critical service valves Pressure-relief valves Food-safe resins Extended seat life You must login or register in order to post a comment. Report Abusive Comment Thank you for helping us to improve our forums. Is this comment offensive? Please tell us why.