Active Chemical Systems, Inc. manufactures new and replacement systems and components for Cylindrical Block, Cubic Block, Shell & Tube heat exchangers, and Plate Immersion Heaters. All heaters and heat exchanger units are built from formulations of graphite for maximum thermal efficiency and chemical compatibility. Our ability to do all of our own in house Phenolic Resin & Teflon Graphite Impregnation allows us to deliver high quality components in a fraction of the time. We use only the finest raw graphite material, and our quality control is second to none ensuring complete impregnation of all of our graphite products. Each unit is rigorously pressure tested and inspected to assure our customers receive safe and reliable systems. Because of our large amount of graphite inventory from graphite blocks to graphite tubes, we are able to offer the fastest deliveries available!