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我厂于1977年开始试制Dg65、Pg6聚三氟氯乙烯衬里旋塞(下称F-3衬里旋塞),并于1978年7月制造成功。在三年多的使用实践中,经受了耐腐蚀性能、温差变化、耐磨性、启闭次数等各项指标的考核,满足使用要求。1980年8月经天津市科委、化工部设备中心站、天津市化工局、天津市染料公司等20多个单位联合鉴定,一致认为,F—3衬里旋塞原料立足国内,耐蚀性能优良,结
I plant in 1977 trial production of Dg65, Pg6 polychlorotrifluoroethylene lined plug (hereinafter referred to as F-3 lined cock), and in 1978 July made. In more than three years of using practice, it has been tested on various indexes such as corrosion resistance, temperature change, abrasion resistance, opening and closing times, etc. to meet the requirements of use. August 1980 by the Tianjin Science and Technology Commission, Ministry of Chemical Equipment Center Station, Tianjin Chemical Industry Bureau, Tianjin Dye Company more than 20 units jointly identified, agreed that the F-3 lining tap material based in the country, excellent corrosion resistance, knot