DANBURY, Conn.--(BUSINESS WIRE)--Praxair, Inc. (NYSE:PX) today announced that its newest tunnel freezing system, the Praxair® ColdFront™ cryo-saver tunnel freezer, will be shown to visitors during Seafood Processing North America in booth 1465. The exposition is being held at the Boston Convention & Exhibition Center from March 15-17, 2015. The Praxair ColdFront cryo-saver tunnel freezer employs field-proven technology to allow processors to lower production costs up to 15 percent by freezi