法兰连接方式 口径:DN50~DN450 SS304阀板和不锈钢阀杆 阀座:EPDM、NBR、VITON 有直接安装平台 气动、电动操作 阀座 温度 EPDM-H -15° C. to +120° C. NBR -10° C. to +80° C. FPM -20° C. to +170° C. 选项 Natural rubber - 30° C. to +80° C. Hypalon - 20° C. to +75° C. Silicone - 40° C. to +170° C. PTFE on silicone backup -40° C. to +180° C.