回油阀 meaning in English

oil return valve
spill valve

Fuel return valve assembly
回油阀部件
Whole scheme of frame design of test - bed is proposed as : the host fanner supply the firebox the once and twice air required by diesel oil ' s burning and the cooling air ; the export parameter of the test - bed is varied by the adjust of the flux of air and diesel oil . and the air flux is varied by adjusting the rev of the fanner adjusted by transducer and the corner of the fan inlet adjusted by step motor . the quantity of oil is varied by adjusting the oil valve adjusted by step motor ; the measurement of the air flux in the test - bed adopts the method of fanner dynamics performance test in the nation criterion
确立了实验台结构设计方案：主风机为燃烧器提供燃烧所需的一次、二次进风量及冷却风量；利用变频器调节主风机转速、用步进电机调节风门开度来调节风量，用步进电机调节回油阀开度来调节供油量，从而实现对模拟实验台出口烟气热流量的调节；实验台的流量测量采用风机动力性能测试标准中测流量方法等。