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1·It is diaphragm type back pressure valve.

背压阀为隔膜式，能调整设定压力。

2·According to flow in a different, balanced spool valve the pressure can be pre-pressure, can also be a back pressure valve.

根据流向不同，平衡阀芯所受的压力可以是阀前压力，也可以是阀后压力。

3·If the engine backfires, the sudden pressure in the intake manifold forces the valve back.

如果发动机回火，进气歧管骤增的压力就迫使阀门向后移动。

4·Export pump with check valve, it will immediately turn off to prevent reverse flow back high-pressure water pump.

水泵出口装有逆止阀时，它会立即关闭，防止高压水反向流回水泵。

5·The performance and structure of existing back valve are introduced, and an ultra-low pressure startup back valve, which can be fixed freely in any pipes with any directions, is designed.

对现有止回阀的性能、结构进行了分析，设计了一种可以随意安装于各种方向的管道中的超低压力启动上回阀。

6·The necessary back-pressure is often created and controlled by a valve that is set to operate under the desired range of conditions.

所必需的回压通常由一个阀来产生和控制，此阀被调定在所要求的条件范围内进行工作。

7·The balance extension tube functions to retain balanced pressure in front and at the back of the cleaner prior to the opening of the valve to prevent it from impacting the valve core.

发球筒平衡接管的作用是在通球初始时，出球接口端的阀门未开启前使清管器在发球筒中处于前后压力平衡，不能撞向阀芯。

8·Working pressure is the hydraulic pressure control valve before the working hydraulic control valve back pressure minus the difference.

工作压差是指水力控制阀前的工作压力减去水力控制阀出口背压的差值。

9·The key of calculation and selection of the valve is to select the correct flow value and the differential pressure value between the valve front and back for calculation.

在阀径计算和选型时关键在于正确选取用于计算的流量值和阀前后差压。

10·The key of calculation and selection of the valve is to select the correct now value and the differential pressure value between the valve front and back for calculation.

在阀径计算和选型时关键在于正确选取用于计算的流量值和阀前后差压。