压差平衡阀，亦称自力式压差控制阀，是一种不需外来能源依靠被调介质自身压力变化进行自动调节的阀门，适用于分户计量或自动控制系统中。压差平衡阀为双瓣结构，阀杆不平衡力小，结构紧凑，用于供热（空调）水系列中，恒定被控制系统的压差。
在部分负荷的条件下，利用动态平衡阀是防止气蚀的有效方法，因为它减少了通过平衡阀的压差。
Under part-load conditions the use of a dynamic balancing valve is a more effective method to prevent a cavitation as it reduces the pressure drop across a balancing valve.
另外由于流量平衡阀是靠压差方式调整流量的，将对水系统产生一定的阻力。
In addition, as flow balancing valve is adjusted by way of flow pressure, the water system will have some resistance.
平衡阀主要有：静态平衡阀、动态平衡阀、压差控制阀等系列空调水平衡系统。
And the balance valve which is used in the air conditioning water balanced system, includes static balance valve, dynamic balance valve, different pressure control valve ect.
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