译文：
限流止回阀主要用于多泵并联采用改变台数的方式进行流量调节的系统中，安装在水泵的出口，起限制水泵流量，稳定扬程。使水泵在高效区内工作，防止低扬程大流量水泵过载烧坏电机。 限流止回阀性能与特点： 　　限流止回阀支持水泵工作点在高效区内工作，限制水泵大流量，低效率时运行，同时微阻缓闭止回停泵时，关闭无水锤现象；还可以防止水泵过载超额定电流烧坏电机；有无级调节扬程功能；限制扬程可调范围0.1-0.6MPa，压力设定在0.1MPa；可调介质温度在0-150℃之间。 　　限流止回阀使用方法： 　　限流止回阀介质流动方向应与阀体箭头方向一致，可以外接导压管装置出厂前均通过压力试验，安装时严禁损伤导压装置；阀上的1/2管接头应安装在水泵入口处；可水平安装也可以垂直安装；限流止回阀的需求扬程大于0.1MPa时，先逆时针把四通开大，然后再顺时针逐渐关闭调压阀，关闭过程中出口压力会逐渐增大，直至出口压力为需要扬程时，即完成初调节，反复启闭水泵2-3次，每次运行3-5分钟，出口压力不变即完成调试工作；视水质情况应经常检查出口压力值，当出口压力小于设定值时，应开启过滤器排除污物。

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原文：
Current-limiting valve is mainly used for multi-pump units in parallel with changes in the way the number of traffic conditioning system, installed in the pump exports, from restrictions on water pump flow, stable head. Efficiency of pumps in the area, to prevent low head high flow pump motor overload burned. Limiting valve performance and features: Limiting valve pump operating point to support the work in the high zone, limiting pump large flow and low efficiency of operation, while micro-Slow Close-return pump shut down, turn off the water hammer phenomenon; also prevent excess water pump overload setting current burned-out motor; whether the head-level adjustment function; restrictions lift adjustable range 0.1-0.6MPa, the pressure set at 0.1MPa; adjustable between medium temperature 0-150 ℃. Limiting valve to use: Limiting valve should be the medium flow direction arrow on valve body in the same direction, you can add pressure pipe fittings factory guide both through pressure testing, installation guide is strictly prohibited Injury pressure device; valve 1 / 2 connector should be installed at the pump entrance Department; can be installed level can also be mounted vertically; limit the demand valve lift is greater than 0.1MPa, the first four-way counter-clockwise to open big, and then gradually close the relief valve clockwise to close the process of outlet pressure will gradually increases, until the outlet pressure for the need to lift, that is the completion of initial adjustment, repeatedly open and close pump 2-3 times, each time you run 3-5 minutes, the same outlet pressure to complete the commissioning work; as the water quality should always check the outlet pressure value, when the outlet pressure is less than set value, it should open the filter to exclude dirt.