本[Ben]公司生産的系列自力式氮封調節閥主要由控制[Zhi]閥門、執行 器、指揮器[Qi]、壓力彈簧等部件組[Zu]成。主要用于保持容[Rong]器頂部保護(Hu) 氣體(一(Yi)般為氮氣)的壓力恒(Heng)定，以避免容器内[Nei]物[Wu]料與空氣直接接 觸，防[Fang]止[Zhi]物料揮發、被氧[Yang]化，以及容器的安[An]全。适用于各類(Lei)大[Da]型 儲(Chu)罐的[De]氣封保護系[Xi]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.