/community-hubs/fluid-control-pneumatics/b/fluid-control-pneumatics-blog/posts/advantages-of-a-tunable-proportional-regulatorWhen you need more control over a process than simple on/off valves provide, proportional products offer an easy way to achieve that precision. Proportional regulators, sometimes called I to P or E to P valves, offer end-users a simple and reliable wen-USTelligent Community 13