| 
 LF -  | 
 没有关闭阀 without shutoff valves  | 
| 
 OSY –  | 
 UL/FM外阀杆和轭架弹性阀座闸阀 UL/FM outside stem and yoke resilient seated gate valves  | 
| 
 *OSY FxG –  | 
 法兰进口闸阀连接和槽状出口闸阀连接 Flanged inlet gate connection and grooved outlet gate connection  | 
| 
 *OSY GxF –  | 
 槽状进口闸阀连接和法兰出口闸阀连接 Grooved inlet gate connection and flanged outlet gate connection  | 
| 
 *OSY GxG –  | 
 槽状进口闸阀连接和槽状出口闸阀连接 Grooved inlet gate connection and grooved outlet gate connection  | 
| 
 CFM –  | 
 立方英尺/分钟,水表 cubic feet per minute meter  | 
| 
 GPM –  | 
 美制加仑/分钟,水表 gallons per minute meter  |