Construction and Maintenance of 1700 Series Relief Valves

Along with the introduction of many foreign-made power units and development of home-made heavy units, 1700 Series relief valves,which are designed and fabricated by the Dresser Company,USA,are widely used in Chi- na.The relief valve is back pressure spiral-spring valve whose structure and working principle are not complicated.It is only to know its structure and performance so that you can remove any obstacle and guarantee its safety.