Patents Assigned to Pields Engineering Inc.
  • Apparatus and method for mechanically reducing internal pressure of column in refinery or petrochemical process
    Patent number: 8752576
    Abstract: Disclosed is an apparatus and method for mechanically reducing internal pressure of a column in a refinery or petrochemical process, which uses a safety relay valve for operating an emergency shutdown valve able to mechanically block the supply of a heat source in the process, thus reducing the mounting cost, simplifying the process and ensuring high reliability thanks to the use of mechanical signals.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: June 17, 2014
    Assignee: Pields Engineering Inc.
    Inventor: Chang Hun Na