变量泵为供暖和空调行业提供了节能和延长设备使用寿命的机会。什么是变压容积泵？它是改变系统中水压和流量的任何泵送系统，从而使泵产生的实际压力和体积与系统要求相匹配。图1描述了可变压力容积系统的一般配置。它与变量泵的不同之处在于，压力随需求和体积而变化。 在下面的讨论中，术语“变压容积”将表示为“VPV”。引用:ASHRAE交易，第81卷，第一部分，新泽西州大西洋城

Variable pressure~volume pumping offers the heating and air-conditioning industry the opportunities of saving energy and prolonging the usefule life of equipment. What is variable pressure-volume pumping? It is any pumping system which varies the water pressure and flow in a system so that the actual pressure and volume produced by a pump match that required by the system. Fig. 1 describes the general configuration of a variable pressure-volume system. It differs from variable volume pumping in that the pressure is varied with demand as well as volume. The term "variable pressure-volume" will be indicated as "VPV" in the following discussion.