предохранительный клапан

safety valve were first used on steam boilers during the industrial revolution.Early boilers without them were prone to accidental explosion when the pressure become too high . the valve are factory set ,tested ,sealed and tagged to service your specific application.Air.Steam,Gas.or Liquid . the set pressure or pop off point are set in accordance to safety and capacity requirements . we recommend settings to not exceed 10% of the vessels or lines operation pressure . As required by the ASME all valves manufactured for steam servicing must have a handle lift lever.For Air and Gas this is optional .