In larger systems, such as those employing long transfer lines or piping, check the flow charts and piping diagrams for the identification of valves and written cleaning procedures.
Reduced port Ball valves are not recommended in building services piping, but rather for process piping in hazardous material transfer.
缩径流道球阀不推荐在建筑物管道系统中使用，但是可用于有害物质传输的处理管道。
3
JAPAN FAWICK ROTORSEAL is a rotary joint which permits the transfer of air (under pressure or a vacuum) or liquids, into or out of stationary piping to a rotating shaft.