White Knight Fluid Handling Inc., a subsidiary of Graco Inc., announced 7/19/19 that Graco acquired Heateflex. Heateflex and White Knight websites are merging. White Knight Fluid Handling Inc., a subsidiary of Graco Inc. (NYSE:GGG), announced today that Graco has acquired the business of Heateflex. Heateflex offers a wide range of Ultra Pure Heaters