本公司生産的系(xì)列自力(lì)式氮封(fēng)調節(jiē)閥主要(yào)由(yóu)控制(zhì)閥門(mén)、執行(háng) 器、指揮(huī)器、壓力彈簧(huáng)等部(bù)件組(zǔ)成。主要用于保(bǎo)持容器頂部保(bǎo)護 氣體(tǐ)(一(yī)般為(wéi)氮氣(qì))的壓力恒(héng)定，以避免容器内物(wù)料與空氣(qì)直接接(jiē) 觸，防(fáng)止物料揮發、被氧(yǎng)化，以(yǐ)及容器的安全(quán)。适用于各(gè)類大型 儲罐的(de)氣封(fēng)保(bǎo)護系(xì)統(tǒng)。 

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.