蠕动泵通过对泵的弹性输送软管交替进行挤压和释放来泵送流体。就象用两根手指夹挤软管一样,随着手指的移动,管内形成负压,液体随之流动.蠕动泵就是在两个转辊子之间的一段泵管形成“枕”形流体。“枕”的体积取决于泵管的内径和转子的几何特征。流量取决于泵头的转速与“枕”的尺寸、转子每转一圈产生的“枕”的个数这三项参数之乘积。“枕”的尺寸一般为常量（泵送粘性特别大的流体时除外）。拿转子直径相同的泵相比较，产生较大“枕”体积的泵，其转子每转一圈所输送的流体体积也较大，但产生的脉动度也较大。这与膜阀的情形相似。而产生较小“枕”体积的泵，其转子每转一圈所输送的流体体积也较小；而且，快速、连续地形成的小“枕”使流体的流动较为平稳。这与齿轮泵的情形相似。

The creep pump works by squeezing and releasing the pump by squeezing and releasing the pump. Like use two fingers to squeeze the hose, along with the movement of the fingers, tube forming negative pressure, the liquid flow. Peristaltic pump is between two turning rolls a form "pillow" form fluid pump pipe. The size of the pillow depends on the internal diameter and the geometry of the rotor. The flow rate depends on the number of "pillow" the number of the "pillow" of the pump head and the "pillow" of the rotor. The size of the "pillow" is usually constant (except when the pump delivers a particularly viscous fluid). With rotor diameter, in comparison with the same pump "pillow" larger volume pump, its rotor per round the transmission fluid volume is bigger also, but the pulse is bigger also. This is similar to the membrane valve. The volume of the pump that produces a smaller "pillow" is smaller than that of the rotor. Furthermore, the rapid and continuous formation of small "pillows" makes the fluid flow more smoothly. This is similar to the case of a gear pump.