背压阀 meaning in English

back pre ure valve
back pressure ale
back pressure valve
counterbalance valve

As we all know , the back - pressure valve ( also called evaporating pressure regulator ) is often used to regulate the evaporating temperature of every high - temperature refrigeratory in the system containing many different temperatures but single engine of the ship . but it is neglected that the energy of the system is lost and the efficiency of the system becomes low
众所周知船舶单机多库(简称为高、低温冷库)系统中，常用背压阀(蒸发压力调节阀)来调节各高温库的蒸发温度，但忽略了系统无形损耗的能量，效率也有所下降。