本[Ben]公司[Si]生産(Chan)的系列自力式氮封(Feng)調節[Jie]閥主要[Yao]由控制閥[Fa]門、執行 器、指揮器(Qi)、壓力彈簧等部件組(Zu)成。主要用于保(Bao)持容器頂部保[Bao]護 氣體(一般為[Wei]氮氣[Qi])的壓力恒定，以避免容器内物料與空氣直接接 觸，防[Fang]止(Zhi)物料揮發(Fa)、被氧[Yang]化，以及(Ji)容器的安全。适用于各類大[Da]型 儲(Chu)罐的(De)氣封保護系統。 

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.