Since incorporated in 1976, SEWON Q & Tech Co., Ltd have developed various type of venting devices & safety devices.Sewon's Pressure & Vacuum Relief Vents and/or Flame Arresters are reliable, and well designed to protect storage tankswhich may increase internal pressure caused by internal or external thermal effects, atmospheric pressure change, controlvalve failure, and exposure of the tank to a fire. SEWON have not only supplied its high quality products to shipbuilding, heavy machinery industries, petrochemical plantsand nuclear power plants but also provided technical solutions to the needs of customer.