Peristaltic pumps certainly have their place in the hygienic process, especially when handling fluids that will be infused with someone's blood (like IV fluid, for example). However, there are phases of the hygienic process that require gentle handling of the fluid being conveyed and the pulsation of a peristaltic pump could damage the product. That is why having a RL or CPP with consistent speed and flow is ideal, depending on the phase of production of the liquid.