本公司[Si]生産[Chan]的系(Xi)列(Lie)自力式氮封(Feng)調節閥主要由控制閥(Fa)門、執行 器、指揮器[Qi]、壓力彈簧等部件組成[Cheng]。主要用于保(Bao)持容(Rong)器頂部保[Bao]護 氣體(一(Yi)般為氮氣)的(De)壓力恒(Heng)定，以避免容器内物料與空氣直接接 觸[Chu]，防(Fang)止(Zhi)物料揮發[Fa]、被氧化，以及容器的安全[Quan]。适用于各類大(Da)型 儲罐的[De]氣封保護系統(Tong)。 

Serial self-operated nitrogen seal regulating valve of the company is mainly composed of several parts including actuated valve， actuator， director and pressure spring.It is utilized to maintain constant pressure of protective gas(generally nitrogen) on the top of containers for avoiding direct contacts of containers and materials， preventing materials from vol at il izing and being oxidized and ensuring containers safeties.It applies to air seal protection systems of all kinds of large-scaled storage tank.