該系列調(diào)與 210C 的不同之處為:采用閥桿貫通流路,頂?shù)纂p填料密封方式。這樣一方面可相互抵消流體對(duì)閥桿的推力,適用于高壓場(chǎng)合;另一方面可消除閥桿熱膨脹的影響,適用于高溫場(chǎng)合;另外,該系列的部分球面形閥板不設(shè)有 V 形切口。
This series is same as 210C series except that the stem penetrates the body and is supported by double gland packing. The stem's blow out force is set off in this construction making it suitable to heavier services such as high pressure, high temperature service because of heat expansion insulation design stem.